EVOLUTION-MANAGER

Edit File: sysvars_server_embedded.result

set time_zone='+00:00'; set timestamp=unix_timestamp('2014-09-01 13:40:23'); set pseudo_thread_id=10; set sql_mode=ansi_quotes; set global div_precision_increment=5; select * from information_schema.system_variables where variable_name not like 'aria%' and variable_name not like 'debug%' and variable_name not like 'wsrep%' and variable_name not in ( 'in_predicate_conversion_threshold', 'have_openssl', 'have_symlink', 'hostname', 'large_files_support', 'log_tc_size', 'lower_case_file_system', 'lower_case_table_names', 'open_files_limit', 'plugin_maturity', 'rand_seed1', 'rand_seed2', 'system_time_zone', 'version_comment', 'version_source_revision', 'version_compile_machine', 'version_compile_os', 'version_malloc_library', 'version_ssl_library', 'version' ) order by variable_name; VARIABLE_NAME ALTER_ALGORITHM SESSION_VALUE DEFAULT GLOBAL_VALUE DEFAULT GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE DEFAULT VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Specify the alter table algorithm NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST DEFAULT,COPY,INPLACE,NOCOPY,INSTANT READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME AUTOCOMMIT SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1, the default, all queries are committed immediately. If set to 0, they are only committed upon a COMMIT statement, or rolled back with a ROLLBACK statement. If autocommit is set to 0, and then changed to 1, all open transactions are immediately committed. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME AUTOMATIC_SP_PRIVILEGES SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Creating and dropping stored procedures alters ACLs NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME AUTO_INCREMENT_INCREMENT SESSION_VALUE 1 GLOBAL_VALUE 1 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE 1 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Auto-increment columns are incremented by this NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 65535 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME AUTO_INCREMENT_OFFSET SESSION_VALUE 1 GLOBAL_VALUE 1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Offset added to Auto-increment columns. Used when auto-increment-increment != 1 NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 65535 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME BACK_LOG SESSION_VALUE NULL GLOBAL_VALUE 80 GLOBAL_VALUE_ORIGIN AUTO DEFAULT_VALUE 150 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of outstanding connection requests MariaDB can have. This comes into play when the main MariaDB thread gets very many connection requests in a very short time NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 65535 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BASEDIR SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Path to installation directory. All paths are usually resolved relative to this NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BIG_TABLES SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Old variable, which if set to 1, allows large result sets by saving all temporary sets to disk, avoiding 'table full' errors. No longer needed, as the server now handles this automatically. sql_big_tables is a synonym. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME BIND_ADDRESS SESSION_VALUE NULL GLOBAL_VALUE 127.0.0.1 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT IP address to bind to. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BINLOG_ANNOTATE_ROW_EVENTS SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Tells the master to annotate RBR events with the statement that caused these events NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME BINLOG_CACHE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 32768 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 32768 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The size of the transactional cache for updates to transactional engines for the binary log. If you often use transactions containing many statements, you can increase this to get more performance NUMERIC_MIN_VALUE 4096 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 4096 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BINLOG_CHECKSUM SESSION_VALUE NULL GLOBAL_VALUE CRC32 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE CRC32 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE ENUM VARIABLE_COMMENT Type of BINLOG_CHECKSUM_ALG. Include checksum for log events in the binary log NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NONE,CRC32 READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BINLOG_COMMIT_WAIT_COUNT SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT If non-zero, binlog write will wait at most binlog_commit_wait_usec microseconds for at least this many commits to queue up for group commit to the binlog. This can reduce I/O on the binlog and provide increased opportunity for parallel apply on the slave, but too high a value will decrease commit throughput. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BINLOG_COMMIT_WAIT_USEC SESSION_VALUE NULL GLOBAL_VALUE 100000 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 100000 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum time, in microseconds, to wait for more commits to queue up for binlog group commit. Only takes effect if the value of binlog_commit_wait_count is non-zero. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BINLOG_DIRECT_NON_TRANSACTIONAL_UPDATES SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Causes updates to non-transactional engines using statement format to be written directly to binary log. Before using this option make sure that there are no dependencies between transactional and non-transactional tables such as in the statement INSERT INTO t_myisam SELECT * FROM t_innodb; otherwise, slaves may diverge from the master. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME BINLOG_FILE_CACHE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 16384 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 16384 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The size of file cache for the binary log NUMERIC_MIN_VALUE 8192 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 4096 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BINLOG_FORMAT SESSION_VALUE MIXED GLOBAL_VALUE MIXED GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE MIXED VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT What form of binary logging the master will use: either ROW for row-based binary logging, STATEMENT for statement-based binary logging, or MIXED. MIXED is statement-based binary logging except for those statements where only row-based is correct: those which involve user-defined functions (i.e. UDFs) or the UUID() function; for those, row-based binary logging is automatically used. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST MIXED,STATEMENT,ROW READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BINLOG_OPTIMIZE_THREAD_SCHEDULING SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Run fast part of group commit in a single thread, to optimize kernel thread scheduling. On by default. Disable to run each transaction in group commit in its own thread, which can be slower at very high concurrency. This option is mostly for testing one algorithm versus the other, and it should not normally be necessary to change it. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BINLOG_ROW_IMAGE SESSION_VALUE FULL GLOBAL_VALUE FULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE FULL VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Controls whether rows should be logged in 'FULL', 'NOBLOB' or 'MINIMAL' formats. 'FULL', means that all columns in the before and after image are logged. 'NOBLOB', means that mysqld avoids logging blob columns whenever possible (eg, blob column was not changed or is not part of primary key). 'MINIMAL', means that a PK equivalent (PK columns or full row if there is no PK in the table) is logged in the before image, and only changed columns are logged in the after image. (Default: FULL). NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST MINIMAL,NOBLOB,FULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BINLOG_STMT_CACHE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 32768 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 32768 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The size of the statement cache for updates to non-transactional engines for the binary log. If you often use statements updating a great number of rows, you can increase this to get more performance. NUMERIC_MIN_VALUE 4096 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 4096 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME BULK_INSERT_BUFFER_SIZE SESSION_VALUE 8388608 GLOBAL_VALUE 8388608 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 8388608 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Size of tree cache used in bulk insert optimisation. Note that this is a limit per thread! NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME CHARACTER_SETS_DIR SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Directory where character sets are NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME CHARACTER_SET_CLIENT SESSION_VALUE latin1 GLOBAL_VALUE latin1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE latin1 VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The character set for statements that arrive from the client NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME CHARACTER_SET_CONNECTION SESSION_VALUE latin1 GLOBAL_VALUE latin1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE latin1 VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The character set used for literals that do not have a character set introducer and for number-to-string conversion NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME CHARACTER_SET_DATABASE SESSION_VALUE latin1 GLOBAL_VALUE latin1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE latin1 VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The character set used by the default database NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME CHARACTER_SET_FILESYSTEM SESSION_VALUE binary GLOBAL_VALUE binary GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE binary VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The filesystem character set NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME CHARACTER_SET_RESULTS SESSION_VALUE latin1 GLOBAL_VALUE latin1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE latin1 VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The character set used for returning query results to the client NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME CHARACTER_SET_SERVER SESSION_VALUE latin1 GLOBAL_VALUE latin1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE latin1 VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The default character set NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME CHARACTER_SET_SYSTEM SESSION_VALUE NULL GLOBAL_VALUE utf8 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE ENUM VARIABLE_COMMENT The character set used by the server for storing identifiers NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME CHECK_CONSTRAINT_CHECKS SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT check_constraint_checks NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME COLLATION_CONNECTION SESSION_VALUE latin1_swedish_ci GLOBAL_VALUE latin1_swedish_ci GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE latin1_swedish_ci VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The collation of the connection character set NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME COLLATION_DATABASE SESSION_VALUE latin1_swedish_ci GLOBAL_VALUE latin1_swedish_ci GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE latin1_swedish_ci VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The collation of the database character set NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME COLLATION_SERVER SESSION_VALUE latin1_swedish_ci GLOBAL_VALUE latin1_swedish_ci GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE latin1_swedish_ci VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The server default collation NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME COLUMN_COMPRESSION_THRESHOLD SESSION_VALUE 100 GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 100 VARIABLE_SCOPE SESSION VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Minimum column data length eligible for compression NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME COLUMN_COMPRESSION_ZLIB_LEVEL SESSION_VALUE 6 GLOBAL_VALUE 6 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 6 VARIABLE_SCOPE SESSION VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT zlib compression level (1 gives best speed, 9 gives best compression) NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 9 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME COLUMN_COMPRESSION_ZLIB_STRATEGY SESSION_VALUE DEFAULT_STRATEGY GLOBAL_VALUE DEFAULT_STRATEGY GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE DEFAULT_STRATEGY VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The strategy parameter is used to tune the compression algorithm. Use the value DEFAULT_STRATEGY for normal data, FILTERED for data produced by a filter (or predictor), HUFFMAN_ONLY to force Huffman encoding only (no string match), or RLE to limit match distances to one (run-length encoding). Filtered data consists mostly of small values with a somewhat random distribution. In this case, the compression algorithm is tuned to compress them better. The effect of FILTERED is to force more Huffman coding and less string matching; it is somewhat intermediate between DEFAULT_STRATEGY and HUFFMAN_ONLY. RLE is designed to be almost as fast as HUFFMAN_ONLY, but give better compression for PNG image data. The strategy parameter only affects the compression ratio but not the correctness of the compressed output even if it is not set appropriately. FIXED prevents the use of dynamic Huffman codes, allowing for a simpler decoder for special applications. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST DEFAULT_STRATEGY,FILTERED,HUFFMAN_ONLY,RLE,FIXED READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME COLUMN_COMPRESSION_ZLIB_WRAP SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Generate zlib header and trailer and compute adler32 check value. It can be used with storage engines that don't provide data integrity verification to detect data corruption. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME COMPLETION_TYPE SESSION_VALUE NO_CHAIN GLOBAL_VALUE NO_CHAIN GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NO_CHAIN VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT The transaction completion type NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NO_CHAIN,CHAIN,RELEASE READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME CONCURRENT_INSERT SESSION_VALUE NULL GLOBAL_VALUE AUTO GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE AUTO VARIABLE_SCOPE GLOBAL VARIABLE_TYPE ENUM VARIABLE_COMMENT Use concurrent insert with MyISAM NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NEVER,AUTO,ALWAYS READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME CONNECT_TIMEOUT SESSION_VALUE NULL GLOBAL_VALUE 60 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE 10 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of seconds the mysqld server is waiting for a connect packet before responding with 'Bad handshake' NUMERIC_MIN_VALUE 2 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME CORE_FILE SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT write a core-file on crashes NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME DATADIR SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE PATH VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Path to the database root directory NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DATETIME_FORMAT SESSION_VALUE NULL GLOBAL_VALUE %Y-%m-%d %H:%i:%s GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE %Y-%m-%d %H:%i:%s VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The DATETIME format (ignored) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DATE_FORMAT SESSION_VALUE NULL GLOBAL_VALUE %Y-%m-%d GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE %Y-%m-%d VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The DATE format (ignored) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DEADLOCK_SEARCH_DEPTH_LONG SESSION_VALUE 15 GLOBAL_VALUE 15 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 15 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Long search depth for the two-step deadlock detection NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 33 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DEADLOCK_SEARCH_DEPTH_SHORT SESSION_VALUE 4 GLOBAL_VALUE 4 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 4 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Short search depth for the two-step deadlock detection NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 32 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DEADLOCK_TIMEOUT_LONG SESSION_VALUE 50000000 GLOBAL_VALUE 50000000 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 50000000 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Long timeout for the two-step deadlock detection (in microseconds) NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DEADLOCK_TIMEOUT_SHORT SESSION_VALUE 10000 GLOBAL_VALUE 10000 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 10000 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Short timeout for the two-step deadlock detection (in microseconds) NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DEFAULT_REGEX_FLAGS SESSION_VALUE GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE VARIABLE_SCOPE SESSION VARIABLE_TYPE SET VARIABLE_COMMENT Default flags for the regex library NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST DOTALL,DUPNAMES,EXTENDED,EXTRA,MULTILINE,UNGREEDY READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DEFAULT_STORAGE_ENGINE SESSION_VALUE MyISAM GLOBAL_VALUE MyISAM GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE MyISAM VARIABLE_SCOPE SESSION VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The default storage engine for new tables NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME DEFAULT_TMP_STORAGE_ENGINE SESSION_VALUE GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE SESSION VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The default storage engine for user-created temporary tables NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME DEFAULT_WEEK_FORMAT SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The default week format used by WEEK() functions NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 7 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DELAYED_INSERT_LIMIT SESSION_VALUE NULL GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 100 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT After inserting delayed_insert_limit rows, the INSERT DELAYED handler will check if there are any SELECT statements pending. If so, it allows these to execute before continuing. NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DELAYED_INSERT_TIMEOUT SESSION_VALUE NULL GLOBAL_VALUE 300 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 300 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT How long a INSERT DELAYED thread should wait for INSERT statements before terminating NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DELAYED_QUEUE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 1000 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1000 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT What size queue (in rows) should be allocated for handling INSERT DELAYED. If the queue becomes full, any client that does INSERT DELAYED will wait until there is room in the queue again NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME DELAY_KEY_WRITE SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE GLOBAL VARIABLE_TYPE ENUM VARIABLE_COMMENT Specifies how MyISAM tables handles CREATE TABLE DELAY_KEY_WRITE. If set to ON, the default, any DELAY KEY WRITEs are honored. The key buffer is then flushed only when the table closes, speeding up writes. MyISAM tables should be automatically checked upon startup in this case, and --external locking should not be used, as it can lead to index corruption. If set to OFF, DELAY KEY WRITEs are ignored, while if set to ALL, all new opened tables are treated as if created with DELAY KEY WRITEs enabled. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON,ALL READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME DIV_PRECISION_INCREMENT SESSION_VALUE 4 GLOBAL_VALUE 5 GLOBAL_VALUE_ORIGIN SQL DEFAULT_VALUE 4 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Precision of the result of '/' operator will be increased on that value NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 38 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME ENCRYPT_BINLOG SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Encrypt binary logs (including relay logs) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME ENCRYPT_TMP_DISK_TABLES SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Encrypt temporary on-disk tables (created as part of query execution) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME ENCRYPT_TMP_FILES SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Encrypt temporary files (created for filesort, binary log cache, etc) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME ENFORCE_STORAGE_ENGINE SESSION_VALUE GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE SESSION VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Force the use of a storage engine for new tables NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME EQ_RANGE_INDEX_DIVE_LIMIT SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT The optimizer will use existing index statistics instead of doing index dives for equality ranges if the number of equality ranges for the index is larger than or equal to this number. If set to 0, index dives are always used. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME ERROR_COUNT SESSION_VALUE 0 GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of errors that resulted from the last statement that generated messages NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME EXPENSIVE_SUBQUERY_LIMIT SESSION_VALUE 100 GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 100 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The maximum number of rows a subquery may examine in order to be executed during optimization and used for constant optimization NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME EXPIRE_LOGS_DAYS SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT If non-zero, binary logs will be purged after expire_logs_days days; possible purges happen at startup and at binary log rotation NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 99 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME EXPLICIT_DEFAULTS_FOR_TIMESTAMP SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT This option causes CREATE TABLE to create all TIMESTAMP columns as NULL with DEFAULT NULL attribute, Without this option, TIMESTAMP columns are NOT NULL and have implicit DEFAULT clauses. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME EXTERNAL_USER SESSION_VALUE GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The external user account used when logging in NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME EXTRA_MAX_CONNECTIONS SESSION_VALUE NULL GLOBAL_VALUE 1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of connections on extra-port NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 100000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME EXTRA_PORT SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Extra port number to use for tcp connections in a one-thread-per-connection manner. 0 means don't use another port NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME FLUSH SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Flush MyISAM tables to disk between SQL commands NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME FLUSH_TIME SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT A dedicated thread is created to flush all tables at the given interval NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME FOREIGN_KEY_CHECKS SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1 (the default) foreign key constraints (including ON UPDATE and ON DELETE behavior) InnoDB tables are checked, while if set to 0, they are not checked. 0 is not recommended for normal use, though it can be useful in situations where you know the data is consistent, but want to reload data in a different order from that that specified by parent/child relationships. Setting this variable to 1 does not retrospectively check for inconsistencies introduced while set to 0. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME FT_BOOLEAN_SYNTAX SESSION_VALUE NULL GLOBAL_VALUE + -><()~*:""&| GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE + -><()~*:""&| VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT List of operators for MATCH ... AGAINST ( ... IN BOOLEAN MODE) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME FT_MAX_WORD_LEN SESSION_VALUE NULL GLOBAL_VALUE 84 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 84 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The maximum length of the word to be included in a FULLTEXT index. Note: FULLTEXT indexes must be rebuilt after changing this variable NUMERIC_MIN_VALUE 10 NUMERIC_MAX_VALUE 84 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME FT_MIN_WORD_LEN SESSION_VALUE NULL GLOBAL_VALUE 4 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 4 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The minimum length of the word to be included in a FULLTEXT index. Note: FULLTEXT indexes must be rebuilt after changing this variable NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 84 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME FT_QUERY_EXPANSION_LIMIT SESSION_VALUE NULL GLOBAL_VALUE 20 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 20 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Number of best matches to use for query expansion NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 1000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME FT_STOPWORD_FILE SESSION_VALUE NULL GLOBAL_VALUE (built-in) GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Use stopwords from this file instead of built-in list NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME GENERAL_LOG SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Log connections and queries to a table or log file. Defaults logging to a file 'hostname'.log or a table mysql.general_logif --log-output=TABLE is used. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME GENERAL_LOG_FILE SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Log connections and queries to given file NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME GROUP_CONCAT_MAX_LEN SESSION_VALUE 1048576 GLOBAL_VALUE 1048576 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1048576 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The maximum length of the result of function GROUP_CONCAT() NUMERIC_MIN_VALUE 4 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME GTID_DOMAIN_ID SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Used with global transaction ID to identify logically independent replication streams. When events can propagate through multiple parallel paths (for example multiple masters), each independent source server must use a distinct domain_id. For simple tree-shaped replication topologies, it can be left at its default, 0. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME GTID_SEQ_NO SESSION_VALUE 0 GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Internal server usage, for replication with global transaction id. When set, next event group logged to the binary log will use this sequence number, not generate a new one, thus allowing to preserve master's GTID in slave's binlog. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HAVE_COMPRESS SESSION_VALUE NULL GLOBAL_VALUE YES GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT If the zlib compression library is accessible to the server, this will be set to YES, otherwise it will be NO. The COMPRESS() and UNCOMPRESS() functions will only be available if set to YES. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HAVE_CRYPT SESSION_VALUE NULL GLOBAL_VALUE YES GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT If the crypt() system call is available this variable will be set to YES, otherwise it will be set to NO. If set to NO, the ENCRYPT() function cannot be used. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HAVE_DYNAMIC_LOADING SESSION_VALUE NULL GLOBAL_VALUE YES GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT If the server supports dynamic loading of plugins, will be set to YES, otherwise will be set to NO. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HAVE_GEOMETRY SESSION_VALUE NULL GLOBAL_VALUE YES GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT If the server supports spatial data types, will be set to YES, otherwise will be set to NO. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HAVE_PROFILING SESSION_VALUE NULL GLOBAL_VALUE YES GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT If statement profiling is available, will be set to YES, otherwise will be set to NO. See SHOW PROFILES and SHOW PROFILE. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HAVE_QUERY_CACHE SESSION_VALUE NULL GLOBAL_VALUE YES GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT If the server supports the query cache, will be set to YES, otherwise will be set to NO. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HAVE_RTREE_KEYS SESSION_VALUE NULL GLOBAL_VALUE YES GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT If RTREE indexes (used for spatial indexes) are available, will be set to YES, otherwise will be set to NO. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HAVE_SSL SESSION_VALUE NULL GLOBAL_VALUE NO GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT If the server supports secure connections, will be set to YES, otherwise will be set to NO. If set to DISABLED, the server was compiled with TLS support, but was not started with TLS support (see the mysqld options). See also have_openssl. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HISTOGRAM_SIZE SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Number of bytes used for a histogram. If set to 0, no histograms are created by ANALYZE. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 255 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME HISTOGRAM_TYPE SESSION_VALUE SINGLE_PREC_HB GLOBAL_VALUE SINGLE_PREC_HB GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE SINGLE_PREC_HB VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Specifies type of the histograms created by ANALYZE. Possible values are: SINGLE_PREC_HB - single precision height-balanced, DOUBLE_PREC_HB - double precision height-balanced. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST SINGLE_PREC_HB,DOUBLE_PREC_HB READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME HOST_CACHE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 279 GLOBAL_VALUE_ORIGIN AUTO DEFAULT_VALUE 128 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT How many host names should be cached to avoid resolving. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 65536 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME IDENTITY SESSION_VALUE 0 GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Synonym for the last_insert_id variable NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME IDLE_READONLY_TRANSACTION_TIMEOUT SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT The number of seconds the server waits for read-only idle transaction NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME IDLE_TRANSACTION_TIMEOUT SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT The number of seconds the server waits for idle transaction NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME IDLE_WRITE_TRANSACTION_TIMEOUT SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT The number of seconds the server waits for write idle transaction NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME IGNORE_BUILTIN_INNODB SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Disable initialization of builtin InnoDB plugin NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME IGNORE_DB_DIRS SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Specifies a directory to add to the ignore list when collecting database names from the datadir. Put a blank argument to reset the list accumulated so far. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME INIT_CONNECT SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Command(s) that are executed for each new connection (unless the user has SUPER privilege) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME INIT_FILE SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Read SQL commands from this file at startup NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME INIT_SLAVE SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Command(s) that are executed by a slave server each time the SQL thread starts NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME INSERT_ID SESSION_VALUE 0 GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The value to be used by the following INSERT or ALTER TABLE statement when inserting an AUTO_INCREMENT value NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME INTERACTIVE_TIMEOUT SESSION_VALUE 28800 GLOBAL_VALUE 28800 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 28800 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of seconds the server waits for activity on an interactive connection before closing it NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME IN_TRANSACTION SESSION_VALUE 0 GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Whether there is an active transaction NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 1 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME JOIN_BUFFER_SIZE SESSION_VALUE 262144 GLOBAL_VALUE 262144 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 262144 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The size of the buffer that is used for joins NUMERIC_MIN_VALUE 128 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 128 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME JOIN_BUFFER_SPACE_LIMIT SESSION_VALUE 2097152 GLOBAL_VALUE 2097152 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 2097152 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The limit of the space for all join buffers used by a query NUMERIC_MIN_VALUE 2048 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 2048 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME JOIN_CACHE_LEVEL SESSION_VALUE 2 GLOBAL_VALUE 2 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 2 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Controls what join operations can be executed with join buffers. Odd numbers are used for plain join buffers while even numbers are used for linked buffers NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 8 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME KEEP_FILES_ON_CREATE SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Don't overwrite stale .MYD and .MYI even if no directory is specified NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME KEY_BUFFER_SIZE SESSION_VALUE NULL GLOBAL_VALUE 1048576 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE 134217728 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The size of the buffer used for index blocks for MyISAM tables. Increase this to get better index handling (for all reads and multiple writes) to as much as you can afford NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 4096 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME KEY_CACHE_AGE_THRESHOLD SESSION_VALUE NULL GLOBAL_VALUE 300 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 300 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT This characterizes the number of hits a hot block has to be untouched until it is considered aged enough to be downgraded to a warm block. This specifies the percentage ratio of that number of hits to the total number of blocks in key cache NUMERIC_MIN_VALUE 100 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 100 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME KEY_CACHE_BLOCK_SIZE SESSION_VALUE NULL GLOBAL_VALUE 1024 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1024 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The default size of key cache blocks NUMERIC_MIN_VALUE 512 NUMERIC_MAX_VALUE 16384 NUMERIC_BLOCK_SIZE 512 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME KEY_CACHE_DIVISION_LIMIT SESSION_VALUE NULL GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 100 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The minimum percentage of warm blocks in key cache NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 100 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME KEY_CACHE_FILE_HASH_SIZE SESSION_VALUE NULL GLOBAL_VALUE 512 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 512 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Number of hash buckets for open and changed files. If you have a lot of MyISAM files open you should increase this for faster flush of changes. A good value is probably 1/10 of number of possible open MyISAM files. NUMERIC_MIN_VALUE 128 NUMERIC_MAX_VALUE 16384 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME KEY_CACHE_SEGMENTS SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of segments in a key cache NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 64 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LARGE_PAGES SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Enable support for large pages NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LARGE_PAGE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT If large page support is enabled, this shows the size of memory pages NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LAST_INSERT_ID SESSION_VALUE 0 GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The value to be returned from LAST_INSERT_ID() NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LC_MESSAGES SESSION_VALUE en_US GLOBAL_VALUE en_US GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE en_US VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Set the language used for the error messages NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LC_MESSAGES_DIR SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Directory where error messages are NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LC_TIME_NAMES SESSION_VALUE en_US GLOBAL_VALUE en_US GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE en_US VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Set the language used for the month names and the days of the week NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LICENSE SESSION_VALUE NULL GLOBAL_VALUE GPL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The type of license the server has NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LOCAL_INFILE SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE ON VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Enable LOAD DATA LOCAL INFILE NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LOCKED_IN_MEMORY SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Whether mysqld was locked in memory with --memlock NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LOCK_WAIT_TIMEOUT SESSION_VALUE 86400 GLOBAL_VALUE 86400 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 86400 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Timeout in seconds to wait for a lock before returning an error. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LOG_BIN SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Whether the binary log is enabled NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LOG_BIN_COMPRESS SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Whether the binary log can be compressed NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LOG_BIN_COMPRESS_MIN_LEN SESSION_VALUE NULL GLOBAL_VALUE 256 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 256 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Minimum length of sql statement(in statement mode) or record(in row mode)that can be compressed. NUMERIC_MIN_VALUE 10 NUMERIC_MAX_VALUE 1024 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LOG_BIN_TRUST_FUNCTION_CREATORS SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to FALSE (the default), then when --log-bin is used, creation of a stored function (or trigger) is allowed only to users having the SUPER privilege and only if this stored function (trigger) may not break binary logging. Note that if ALL connections to this server ALWAYS use row-based binary logging, the security issues do not exist and the binary logging cannot break, so you can safely set this to TRUE NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LOG_DISABLED_STATEMENTS SESSION_VALUE sp GLOBAL_VALUE sp GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE sp VARIABLE_SCOPE SESSION VARIABLE_TYPE SET VARIABLE_COMMENT Don't log certain types of statements to general log NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST slave,sp READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LOG_ERROR SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Log errors to file (instead of stdout). If file name is not specified then 'datadir'/'log-basename'.err or the 'pid-file' path with extension .err is used NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LOG_OUTPUT SESSION_VALUE NULL GLOBAL_VALUE FILE GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE FILE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE SET VARIABLE_COMMENT How logs should be written NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NONE,FILE,TABLE READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LOG_QUERIES_NOT_USING_INDEXES SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Log queries that are executed without benefit of any index to the slow log if it is open. Same as log_slow_filter='not_using_index' NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LOG_SLOW_ADMIN_STATEMENTS SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Log slow OPTIMIZE, ANALYZE, ALTER and other administrative statements to the slow log if it is open. Resets or sets the option 'admin' in log_slow_disabled_statements NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LOG_SLOW_DISABLED_STATEMENTS SESSION_VALUE sp GLOBAL_VALUE sp GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE sp VARIABLE_SCOPE SESSION VARIABLE_TYPE SET VARIABLE_COMMENT Don't log certain types of statements to slow log NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST admin,call,slave,sp READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LOG_SLOW_FILTER SESSION_VALUE admin,filesort,filesort_on_disk,filesort_priority_queue,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk GLOBAL_VALUE admin,filesort,filesort_on_disk,filesort_priority_queue,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE admin,filesort,filesort_on_disk,filesort_priority_queue,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk VARIABLE_SCOPE SESSION VARIABLE_TYPE SET VARIABLE_COMMENT Log only certain types of queries to the slow log. If variable empty alll kind of queries are logged. All types are bound by slow_query_time, except 'not_using_index' which is always logged if enabled NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST admin,filesort,filesort_on_disk,filesort_priority_queue,full_join,full_scan,not_using_index,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LOG_SLOW_RATE_LIMIT SESSION_VALUE 1 GLOBAL_VALUE 1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Write to slow log every #th slow query. Set to 1 to log everything. Increase it to reduce the size of the slow or the performance impact of slow logging NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LOG_SLOW_SLAVE_STATEMENTS SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Log slow statements executed by slave thread to the slow log if it is open. Resets or sets the option 'slave' in log_slow_disabled_statements NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LOG_SLOW_VERBOSITY SESSION_VALUE GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE VARIABLE_SCOPE SESSION VARIABLE_TYPE SET VARIABLE_COMMENT Verbosity level for the slow log NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST innodb,query_plan,explain READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LOG_WARNINGS SESSION_VALUE 2 GLOBAL_VALUE 2 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 2 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Log some not critical warnings to the general log file.Value can be between 0 and 11. Higher values mean more verbosity NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME LONG_QUERY_TIME SESSION_VALUE 10.000000 GLOBAL_VALUE 10.000000 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 10.000000 VARIABLE_SCOPE SESSION VARIABLE_TYPE DOUBLE VARIABLE_COMMENT Log all queries that have taken more than long_query_time seconds to execute to the slow query log file. The argument will be treated as a decimal value with microsecond precision NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME LOW_PRIORITY_UPDATES SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT INSERT/DELETE/UPDATE has lower priority than selects NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME MAX_ALLOWED_PACKET SESSION_VALUE 16777216 GLOBAL_VALUE 16777216 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 16777216 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Max packet length to send to or receive from the server NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 1073741824 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_BINLOG_CACHE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 18446744073709547520 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 18446744073709547520 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Sets the total size of the transactional cache NUMERIC_MIN_VALUE 4096 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 4096 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_BINLOG_SIZE SESSION_VALUE NULL GLOBAL_VALUE 1073741824 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1073741824 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Binary log will be rotated automatically when the size exceeds this value. NUMERIC_MIN_VALUE 4096 NUMERIC_MAX_VALUE 1073741824 NUMERIC_BLOCK_SIZE 4096 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_BINLOG_STMT_CACHE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 18446744073709547520 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 18446744073709547520 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Sets the total size of the statement cache NUMERIC_MIN_VALUE 4096 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 4096 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_CONNECTIONS SESSION_VALUE NULL GLOBAL_VALUE 151 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 151 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of simultaneous clients allowed NUMERIC_MIN_VALUE 10 NUMERIC_MAX_VALUE 100000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_CONNECT_ERRORS SESSION_VALUE NULL GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 100 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT If there is more than this number of interrupted connections from a host this host will be blocked from further connections NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_DELAYED_THREADS SESSION_VALUE 20 GLOBAL_VALUE 20 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 20 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Don't start more than this number of threads to handle INSERT DELAYED statements. If set to zero INSERT DELAYED will be not used NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 16384 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_DIGEST_LENGTH SESSION_VALUE NULL GLOBAL_VALUE 1024 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1024 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Maximum length considered for digest text. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_ERROR_COUNT SESSION_VALUE 64 GLOBAL_VALUE 64 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 64 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Max number of errors/warnings to store for a statement NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 65535 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_HEAP_TABLE_SIZE SESSION_VALUE 1048576 GLOBAL_VALUE 1048576 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE 16777216 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Don't allow creation of heap tables bigger than this NUMERIC_MIN_VALUE 16384 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_INSERT_DELAYED_THREADS SESSION_VALUE 20 GLOBAL_VALUE 20 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 20 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Don't start more than this number of threads to handle INSERT DELAYED statements. If set to zero INSERT DELAYED will be not used NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 16384 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME MAX_JOIN_SIZE SESSION_VALUE 18446744073709551615 GLOBAL_VALUE 18446744073709551615 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 18446744073709551615 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Joins that are probably going to read more than max_join_size records return an error NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_LENGTH_FOR_SORT_DATA SESSION_VALUE 1024 GLOBAL_VALUE 1024 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1024 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Max number of bytes in sorted records NUMERIC_MIN_VALUE 4 NUMERIC_MAX_VALUE 8388608 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_LONG_DATA_SIZE SESSION_VALUE NULL GLOBAL_VALUE 16777216 GLOBAL_VALUE_ORIGIN AUTO DEFAULT_VALUE 1048576 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The maximum BLOB length to send to server from mysql_send_long_data API. Deprecated option; use max_allowed_packet instead. NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_PREPARED_STMT_COUNT SESSION_VALUE NULL GLOBAL_VALUE 16382 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 16382 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Maximum number of prepared statements in the server NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_RECURSIVE_ITERATIONS SESSION_VALUE 4294967295 GLOBAL_VALUE 4294967295 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 4294967295 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of iterations when executing recursive queries NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME MAX_SEEKS_FOR_KEY SESSION_VALUE 4294967295 GLOBAL_VALUE 4294967295 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 4294967295 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Limit assumed max number of seeks when looking up rows based on a key NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_SESSION_MEM_USED SESSION_VALUE 9223372036854775807 GLOBAL_VALUE 9223372036854775807 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 9223372036854775807 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Amount of memory a single user session is allowed to allocate. This limits the value of the session variable MEM_USED NUMERIC_MIN_VALUE 8192 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_SORT_LENGTH SESSION_VALUE 1024 GLOBAL_VALUE 1024 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1024 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of bytes to use when sorting BLOB or TEXT values (only the first max_sort_length bytes of each value are used; the rest are ignored) NUMERIC_MIN_VALUE 4 NUMERIC_MAX_VALUE 8388608 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_SP_RECURSION_DEPTH SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum stored procedure recursion depth NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 255 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME MAX_STATEMENT_TIME SESSION_VALUE 0.000000 GLOBAL_VALUE 0.000000 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0.000000 VARIABLE_SCOPE SESSION VARIABLE_TYPE DOUBLE VARIABLE_COMMENT A query that has taken more than max_statement_time seconds will be aborted. The argument will be treated as a decimal value with microsecond precision. A value of 0 (default) means no timeout NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_TMP_TABLES SESSION_VALUE 32 GLOBAL_VALUE 32 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 32 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Unused, will be removed. NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_USER_CONNECTIONS SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE INT VARIABLE_COMMENT The maximum number of active connections for a single user (0 = no limit) NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 2147483647 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MAX_WRITE_LOCK_COUNT SESSION_VALUE NULL GLOBAL_VALUE 4294967295 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 4294967295 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT After this many write locks, allow some read locks to run in between NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME METADATA_LOCKS_CACHE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 1024 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1024 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Unused NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME METADATA_LOCKS_HASH_INSTANCES SESSION_VALUE NULL GLOBAL_VALUE 8 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 8 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Unused NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 1024 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MIN_EXAMINED_ROW_LIMIT SESSION_VALUE 0 GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Don't write queries to slow log that examine fewer rows than that NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MRR_BUFFER_SIZE SESSION_VALUE 262144 GLOBAL_VALUE 262144 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 262144 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Size of buffer to use when using MRR with range access NUMERIC_MIN_VALUE 8192 NUMERIC_MAX_VALUE 2147483647 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MULTI_RANGE_COUNT SESSION_VALUE 256 GLOBAL_VALUE 256 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 256 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Ignored. Use mrr_buffer_size instead NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MYISAM_BLOCK_SIZE SESSION_VALUE NULL GLOBAL_VALUE 1024 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1024 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Block size to be used for MyISAM index pages NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 16384 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MYISAM_DATA_POINTER_SIZE SESSION_VALUE NULL GLOBAL_VALUE 6 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 6 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Default pointer size to be used for MyISAM tables NUMERIC_MIN_VALUE 2 NUMERIC_MAX_VALUE 7 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MYISAM_MAX_SORT_FILE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 9223372036853727232 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 9223372036853727232 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Don't use the fast sort index method to created index if the temporary file would get bigger than this NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 9223372036854775807 NUMERIC_BLOCK_SIZE 1048576 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MYISAM_MMAP_SIZE SESSION_VALUE NULL GLOBAL_VALUE 18446744073709551615 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 18446744073709551615 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Restricts the total memory used for memory mapping of MySQL tables NUMERIC_MIN_VALUE 7 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MYISAM_RECOVER_OPTIONS SESSION_VALUE NULL GLOBAL_VALUE BACKUP,QUICK GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE BACKUP,QUICK VARIABLE_SCOPE GLOBAL VARIABLE_TYPE SET VARIABLE_COMMENT Specifies how corrupted tables should be automatically repaired NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST DEFAULT,BACKUP,FORCE,QUICK,BACKUP_ALL,OFF READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME MYISAM_REPAIR_THREADS SESSION_VALUE 1 GLOBAL_VALUE 1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT If larger than 1, when repairing a MyISAM table all indexes will be created in parallel, with one thread per index. The value of 1 disables parallel repair NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MYISAM_SORT_BUFFER_SIZE SESSION_VALUE 134216704 GLOBAL_VALUE 134216704 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 134216704 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The buffer that is allocated when sorting the index when doing a REPAIR or when creating indexes with CREATE INDEX or ALTER TABLE NUMERIC_MIN_VALUE 4096 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MYISAM_STATS_METHOD SESSION_VALUE NULLS_UNEQUAL GLOBAL_VALUE NULLS_UNEQUAL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULLS_UNEQUAL VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Specifies how MyISAM index statistics collection code should treat NULLs. Possible values of name are NULLS_UNEQUAL (default behavior for 4.1 and later), NULLS_EQUAL (emulate 4.0 behavior), and NULLS_IGNORED NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULLS_UNEQUAL,NULLS_EQUAL,NULLS_IGNORED READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME MYISAM_USE_MMAP SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Use memory mapping for reading and writing MyISAM tables NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NONE VARIABLE_NAME MYSQL56_TEMPORAL_FORMAT SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Use MySQL-5.6 (instead of MariaDB-5.3) format for TIME, DATETIME, TIMESTAMP columns. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME NET_BUFFER_LENGTH SESSION_VALUE 16384 GLOBAL_VALUE 16384 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 16384 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Buffer length for TCP/IP and socket communication NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME NET_READ_TIMEOUT SESSION_VALUE 30 GLOBAL_VALUE 30 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 30 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Number of seconds to wait for more data from a connection before aborting the read NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME NET_RETRY_COUNT SESSION_VALUE 10 GLOBAL_VALUE 10 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 10 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT If a read on a communication port is interrupted, retry this many times before giving up NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME NET_WRITE_TIMEOUT SESSION_VALUE 60 GLOBAL_VALUE 60 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 60 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Number of seconds to wait for a block to be written to a connection before aborting the write NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME OLD SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Use compatible behavior from previous MariaDB version. See also --old-mode NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME OLD_ALTER_TABLE SESSION_VALUE DEFAULT GLOBAL_VALUE DEFAULT GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE DEFAULT VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Alias for alter_algorithm. Deprecated. Use --alter-algorithm instead. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST DEFAULT,COPY,INPLACE,NOCOPY,INSTANT READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME OLD_MODE SESSION_VALUE GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE VARIABLE_SCOPE SESSION VARIABLE_TYPE SET VARIABLE_COMMENT Used to emulate old behavior from earlier MariaDB or MySQL versions NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NO_DUP_KEY_WARNINGS_WITH_IGNORE,NO_PROGRESS_INFO,ZERO_DATE_TIME_CAST READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME OLD_PASSWORDS SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Use old password encryption method (needed for 4.0 and older clients) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME OPTIMIZER_PRUNE_LEVEL SESSION_VALUE 1 GLOBAL_VALUE 1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Controls the heuristic(s) applied during query optimization to prune less-promising partial plans from the optimizer search space. Meaning: 0 - do not apply any heuristic, thus perform exhaustive search; 1 - prune plans based on number of retrieved rows NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 1 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME OPTIMIZER_SEARCH_DEPTH SESSION_VALUE 62 GLOBAL_VALUE 62 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 62 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum depth of search performed by the query optimizer. Values larger than the number of relations in a query result in better query plans, but take longer to compile a query. Values smaller than the number of tables in a relation result in faster optimization, but may produce very bad query plans. If set to 0, the system will automatically pick a reasonable value. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 62 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME OPTIMIZER_SELECTIVITY_SAMPLING_LIMIT SESSION_VALUE 100 GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 100 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Controls number of record samples to check condition selectivity NUMERIC_MIN_VALUE 10 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME OPTIMIZER_SWITCH SESSION_VALUE index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on GLOBAL_VALUE index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on VARIABLE_SCOPE SESSION VARIABLE_TYPE FLAGSET VARIABLE_COMMENT Fine-tune the optimizer behavior NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST index_merge,index_merge_union,index_merge_sort_union,index_merge_intersection,index_merge_sort_intersection,engine_condition_pushdown,index_condition_pushdown,derived_merge,derived_with_keys,firstmatch,loosescan,materialization,in_to_exists,semijoin,partial_match_rowid_merge,partial_match_table_scan,subquery_cache,mrr,mrr_cost_based,mrr_sort_keys,outer_join_with_cache,semijoin_with_cache,join_cache_incremental,join_cache_hashed,join_cache_bka,optimize_join_buffer_size,table_elimination,extended_keys,exists_to_in,orderby_uses_equalities,condition_pushdown_for_derived,split_materialized,default READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME OPTIMIZER_USE_CONDITION_SELECTIVITY SESSION_VALUE 1 GLOBAL_VALUE 1 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Controls selectivity of which conditions the optimizer takes into account to calculate cardinality of a partial join when it searches for the best execution plan Meaning: 1 - use selectivity of index backed range conditions to calculate the cardinality of a partial join if the last joined table is accessed by full table scan or an index scan, 2 - use selectivity of index backed range conditions to calculate the cardinality of a partial join in any case, 3 - additionally always use selectivity of range conditions that are not backed by any index to calculate the cardinality of a partial join, 4 - use histograms to calculate selectivity of range conditions that are not backed by any index to calculate the cardinality of a partial join.5 - additionally use selectivity of certain non-range predicates calculated on record samples NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 5 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Enable the performance schema. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME PERFORMANCE_SCHEMA_ACCOUNTS_SIZE SESSION_VALUE NULL GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of instrumented user@host accounts. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_DIGESTS_SIZE SESSION_VALUE NULL GLOBAL_VALUE 200 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Size of the statement digest. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 200 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_EVENTS_STAGES_HISTORY_LONG_SIZE SESSION_VALUE NULL GLOBAL_VALUE 1000 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Number of rows in EVENTS_STAGES_HISTORY_LONG. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_EVENTS_STAGES_HISTORY_SIZE SESSION_VALUE NULL GLOBAL_VALUE 10 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Number of rows per thread in EVENTS_STAGES_HISTORY. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1024 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_EVENTS_STATEMENTS_HISTORY_LONG_SIZE SESSION_VALUE NULL GLOBAL_VALUE 1000 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Number of rows in EVENTS_STATEMENTS_HISTORY_LONG. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_EVENTS_STATEMENTS_HISTORY_SIZE SESSION_VALUE NULL GLOBAL_VALUE 10 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Number of rows per thread in EVENTS_STATEMENTS_HISTORY. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1024 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_EVENTS_WAITS_HISTORY_LONG_SIZE SESSION_VALUE NULL GLOBAL_VALUE 10000 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Number of rows in EVENTS_WAITS_HISTORY_LONG. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_EVENTS_WAITS_HISTORY_SIZE SESSION_VALUE NULL GLOBAL_VALUE 10 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Number of rows per thread in EVENTS_WAITS_HISTORY. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1024 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_HOSTS_SIZE SESSION_VALUE NULL GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of instrumented hosts. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_COND_CLASSES SESSION_VALUE NULL GLOBAL_VALUE 80 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 80 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of condition instruments. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 256 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_COND_INSTANCES SESSION_VALUE NULL GLOBAL_VALUE 1000 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of instrumented condition objects. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_DIGEST_LENGTH SESSION_VALUE NULL GLOBAL_VALUE 1024 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1024 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum length considered for digest text, when stored in performance_schema tables. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_FILE_CLASSES SESSION_VALUE NULL GLOBAL_VALUE 50 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 50 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of file instruments. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 256 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_FILE_HANDLES SESSION_VALUE NULL GLOBAL_VALUE 32768 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 32768 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of opened instrumented files. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_FILE_INSTANCES SESSION_VALUE NULL GLOBAL_VALUE 10000 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of instrumented files. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_MUTEX_CLASSES SESSION_VALUE NULL GLOBAL_VALUE 200 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 200 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of mutex instruments. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 256 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_MUTEX_INSTANCES SESSION_VALUE NULL GLOBAL_VALUE 5000 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of instrumented MUTEX objects. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 104857600 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_RWLOCK_CLASSES SESSION_VALUE NULL GLOBAL_VALUE 40 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 40 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of rwlock instruments. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 256 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_RWLOCK_INSTANCES SESSION_VALUE NULL GLOBAL_VALUE 5000 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of instrumented RWLOCK objects. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 104857600 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_SOCKET_CLASSES SESSION_VALUE NULL GLOBAL_VALUE 10 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 10 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of socket instruments. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 256 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_SOCKET_INSTANCES SESSION_VALUE NULL GLOBAL_VALUE 1000 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of opened instrumented sockets. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_STAGE_CLASSES SESSION_VALUE NULL GLOBAL_VALUE 160 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 160 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of stage instruments. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 256 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_STATEMENT_CLASSES SESSION_VALUE NULL GLOBAL_VALUE 200 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 200 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of statement instruments. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 256 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_TABLE_HANDLES SESSION_VALUE NULL GLOBAL_VALUE 1000 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of opened instrumented tables. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_TABLE_INSTANCES SESSION_VALUE NULL GLOBAL_VALUE 500 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of instrumented tables. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_THREAD_CLASSES SESSION_VALUE NULL GLOBAL_VALUE 50 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 50 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of thread instruments. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 256 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_MAX_THREAD_INSTANCES SESSION_VALUE NULL GLOBAL_VALUE 200 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of instrumented threads. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_SESSION_CONNECT_ATTRS_SIZE SESSION_VALUE NULL GLOBAL_VALUE 2048 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Size of session attribute string buffer per thread. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_SETUP_ACTORS_SIZE SESSION_VALUE NULL GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 100 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of rows in SETUP_ACTORS. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 1024 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_SETUP_OBJECTS_SIZE SESSION_VALUE NULL GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 100 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Maximum number of rows in SETUP_OBJECTS. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PERFORMANCE_SCHEMA_USERS_SIZE SESSION_VALUE NULL GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE -1 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT VARIABLE_COMMENT Maximum number of instrumented users. Use 0 to disable, -1 for automated sizing. NUMERIC_MIN_VALUE -1 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PID_FILE SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Pid file used by safe_mysqld NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PLUGIN_DIR SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Directory for plugins NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PORT SESSION_VALUE NULL GLOBAL_VALUE MASTER_MYPORT GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Port number to use for connection or 0 to default to, my.cnf, $MYSQL_TCP_PORT, /etc/services, built-in default (3306), whatever comes first NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PRELOAD_BUFFER_SIZE SESSION_VALUE 32768 GLOBAL_VALUE 32768 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 32768 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The size of the buffer that is allocated when preloading indexes NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 1073741824 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PROFILING SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1 (0 is default), statement profiling will be enabled. See SHOW PROFILES and SHOW PROFILE. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME PROFILING_HISTORY_SIZE SESSION_VALUE 15 GLOBAL_VALUE 15 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 15 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Number of statements about which profiling information is maintained. If set to 0, no profiles are stored. See SHOW PROFILES. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 100 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PROGRESS_REPORT_TIME SESSION_VALUE 5 GLOBAL_VALUE 5 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 5 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Seconds between sending progress reports to the client for time-consuming statements. Set to 0 to disable progress reporting. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PROTOCOL_VERSION SESSION_VALUE NULL GLOBAL_VALUE 10 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT The version of the client/server protocol used by the MariaDB server NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME PROXY_PROTOCOL_NETWORKS SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Enable proxy protocol for these source networks. The syntax is a comma separated list of IPv4 and IPv6 networks. If the network doesn't contain mask, it is considered to be a single host. "*" represents all networks and must the only directive on the line. String "localhost" represents non-TCP local connections (Unix domain socket, Windows named pipe or shared memory). NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME PROXY_USER SESSION_VALUE GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The proxy user account name used when logging in NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME PSEUDO_SLAVE_MODE SESSION_VALUE OFF GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT SET pseudo_slave_mode= 0,1 are commands that mysqlbinlog adds to beginning and end of binary log dumps. While zero value indeed disables, the actual enabling of the slave applier execution mode is done implicitly when a Format_description_event is sent through the session. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME PSEUDO_THREAD_ID SESSION_VALUE 10 GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT This variable is for internal server use NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME QUERY_ALLOC_BLOCK_SIZE SESSION_VALUE 16384 GLOBAL_VALUE 16384 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 16384 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Allocation block size for query parsing and execution NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME QUERY_CACHE_LIMIT SESSION_VALUE NULL GLOBAL_VALUE 1048576 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1048576 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Don't cache results that are bigger than this NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME QUERY_CACHE_MIN_RES_UNIT SESSION_VALUE NULL GLOBAL_VALUE 4096 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 4096 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The minimum size for blocks allocated by the query cache NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 8 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME QUERY_CACHE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 1048576 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1048576 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The memory allocated to store results from old queries NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME QUERY_CACHE_STRIP_COMMENTS SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Strip all comments from a query before storing it in the query cache NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME QUERY_CACHE_TYPE SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT OFF = Don't cache or retrieve results. ON = Cache all results except SELECT SQL_NO_CACHE ... queries. DEMAND = Cache only SELECT SQL_CACHE ... queries NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON,DEMAND READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME QUERY_CACHE_WLOCK_INVALIDATE SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Invalidate queries in query cache on LOCK for write NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME QUERY_PREALLOC_SIZE SESSION_VALUE 24576 GLOBAL_VALUE 24576 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 24576 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Persistent buffer for query parsing and execution NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME RANGE_ALLOC_BLOCK_SIZE SESSION_VALUE 4096 GLOBAL_VALUE 4096 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 4096 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Allocation block size for storing ranges during optimization NUMERIC_MIN_VALUE 4096 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME READ_BUFFER_SIZE SESSION_VALUE 131072 GLOBAL_VALUE 131072 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 131072 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Each thread that does a sequential scan allocates a buffer of this size for each table it scans. If you do many sequential scans, you may want to increase this value NUMERIC_MIN_VALUE 8192 NUMERIC_MAX_VALUE 2147483647 NUMERIC_BLOCK_SIZE 4096 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME READ_ONLY SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Make all non-temporary tables read-only, with the exception for replication (slave) threads and users with the SUPER privilege NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME READ_RND_BUFFER_SIZE SESSION_VALUE 262144 GLOBAL_VALUE 262144 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 262144 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT When reading rows in sorted order after a sort, the rows are read through this buffer to avoid a disk seeks NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 2147483647 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME ROWID_MERGE_BUFF_SIZE SESSION_VALUE 8388608 GLOBAL_VALUE 8388608 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 8388608 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The size of the buffers used [NOT] IN evaluation via partial matching NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 9223372036854775807 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SECURE_AUTH SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Disallow authentication for accounts that have old (pre-4.1) passwords NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME SECURE_FILE_PRIV SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Limit LOAD DATA, SELECT ... OUTFILE, and LOAD_FILE() to files within specified directory NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SECURE_TIMESTAMP SESSION_VALUE NULL GLOBAL_VALUE NO GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NO VARIABLE_SCOPE GLOBAL VARIABLE_TYPE ENUM VARIABLE_COMMENT Restricts direct setting of a session timestamp. Possible levels are: YES - timestamp cannot deviate from the system clock, REPLICATION - replication thread can adjust timestamp to match the master's, SUPER - a user with this privilege and a replication thread can adjust timestamp, NO - historical behavior, anyone can modify session timestamp NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NO,SUPER,REPLICATION,YES READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SERVER_ID SESSION_VALUE 1 GLOBAL_VALUE 1 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE 1 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Uniquely identifies the server instance in the community of replication partners NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SKIP_EXTERNAL_LOCKING SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Don't use system (external) locking NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SKIP_NAME_RESOLVE SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Don't resolve hostnames. All hostnames are IP's or 'localhost'. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME SKIP_NETWORKING SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Don't allow connection with TCP/IP NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME SKIP_REPLICATION SESSION_VALUE OFF GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Changes are logged into the binary log with the @@skip_replication flag set. Such events will not be replicated by slaves that run with --replicate-events-marked-for-skip set different from its default of REPLICATE. See Selectively skipping replication of binlog events for more information. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SKIP_SHOW_DATABASE SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Don't allow 'SHOW DATABASE' commands NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME SLAVE_COMPRESSED_PROTOCOL SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Use compression on master/slave protocol NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME SLAVE_MAX_ALLOWED_PACKET SESSION_VALUE NULL GLOBAL_VALUE 1073741824 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 1073741824 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The maximum packet length to sent successfully from the master to slave. NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 1073741824 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SLOW_LAUNCH_TIME SESSION_VALUE NULL GLOBAL_VALUE 2 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 2 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT If creating the thread takes longer than this value (in seconds), the Slow_launch_threads counter will be incremented NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SLOW_QUERY_LOG SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Log slow queries to a table or log file. Defaults logging to a file 'hostname'-slow.log or a table mysql.slow_log if --log-output=TABLE is used. Must be enabled to activate other slow log options. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME SLOW_QUERY_LOG_FILE SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Log slow queries to given log file. Defaults logging to 'hostname'-slow.log. Must be enabled to activate other slow log options NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SOCKET SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Socket file to use for connection NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SORT_BUFFER_SIZE SESSION_VALUE 262144 GLOBAL_VALUE 262144 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE 2097152 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Each thread that needs to do a sort allocates a buffer of this size NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SQL_AUTO_IS_NULL SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1, the query SELECT * FROM table_name WHERE auto_increment_column IS NULL will return an auto-increment that has just been successfully inserted, the same as the LAST_INSERT_ID() function. Some ODBC programs make use of this IS NULL comparison. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SQL_BIG_SELECTS SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 0, MariaDB will not perform large SELECTs. See max_join_size for details. If max_join_size is set to anything but DEFAULT, sql_big_selects is automatically set to 0. If sql_big_selects is again set, max_join_size will be ignored. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SQL_BUFFER_RESULT SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1 (0 is default), results from SELECT statements are always placed into temporary tables. This can help the server when it takes a long time to send the results to the client by allowing the table locks to be freed early. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SQL_LOG_BIN SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 0 (1 is the default), no logging to the binary log is done for the client. Only clients with the SUPER privilege can update this variable. Can have unintended consequences if set globally, see SET SQL_LOG_BIN. Starting MariaDB 10.1.7, this variable does not affect the replication of events in a Galera cluster. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SQL_LOG_OFF SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1 (0 is the default), no logging to the general query log is done for the client. Only clients with the SUPER privilege can update this variable. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SQL_MODE SESSION_VALUE ANSI_QUOTES GLOBAL_VALUE STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION VARIABLE_SCOPE SESSION VARIABLE_TYPE SET VARIABLE_COMMENT Sets the sql mode NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST REAL_AS_FLOAT,PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,IGNORE_BAD_TABLE_OPTIONS,ONLY_FULL_GROUP_BY,NO_UNSIGNED_SUBTRACTION,NO_DIR_IN_CREATE,POSTGRESQL,ORACLE,MSSQL,DB2,MAXDB,NO_KEY_OPTIONS,NO_TABLE_OPTIONS,NO_FIELD_OPTIONS,MYSQL323,MYSQL40,ANSI,NO_AUTO_VALUE_ON_ZERO,NO_BACKSLASH_ESCAPES,STRICT_TRANS_TABLES,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ALLOW_INVALID_DATES,ERROR_FOR_DIVISION_BY_ZERO,TRADITIONAL,NO_AUTO_CREATE_USER,HIGH_NOT_PRECEDENCE,NO_ENGINE_SUBSTITUTION,PAD_CHAR_TO_FULL_LENGTH,EMPTY_STRING_IS_NULL,SIMULTANEOUS_ASSIGNMENT READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SQL_NOTES SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1, the default, warning_count is incremented each time a Note warning is encountered. If set to 0, Note warnings are not recorded. mysqldump has outputs to set this variable to 0 so that no unnecessary increments occur when data is reloaded. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SQL_QUOTE_SHOW_CREATE SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1, the default, the server will quote identifiers for SHOW CREATE DATABASE, SHOW CREATE TABLE and SHOW CREATE VIEW statements. Quoting is disabled if set to 0. Enable to ensure replications works when identifiers require quoting. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SQL_SAFE_UPDATES SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1, UPDATEs and DELETEs need either a key in the WHERE clause, or a LIMIT clause, or else they will aborted. Prevents the common mistake of accidentally deleting or updating every row in a table. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME SQL_SELECT_LIMIT SESSION_VALUE 18446744073709551615 GLOBAL_VALUE 18446744073709551615 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 18446744073709551615 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The maximum number of rows to return from SELECT statements NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SQL_WARNINGS SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1, single-row INSERTs will produce a string containing warning information if a warning occurs. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SSL_CA SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT CA file in PEM format (check OpenSSL docs, implies --ssl) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SSL_CAPATH SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT CA directory (check OpenSSL docs, implies --ssl) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SSL_CERT SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT X509 cert in PEM format (implies --ssl) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SSL_CIPHER SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT SSL cipher to use (implies --ssl) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SSL_CRL SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT CRL file in PEM format (check OpenSSL docs, implies --ssl) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SSL_CRLPATH SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT CRL directory (check OpenSSL docs, implies --ssl) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SSL_KEY SESSION_VALUE NULL GLOBAL_VALUE GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT X509 key in PEM format (implies --ssl) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME STANDARD_COMPLIANT_CTE SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Allow only CTEs compliant to SQL standard NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME STORAGE_ENGINE SESSION_VALUE MyISAM GLOBAL_VALUE MyISAM GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE MyISAM VARIABLE_SCOPE SESSION VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Alias for @@default_storage_engine. Deprecated NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME STORED_PROGRAM_CACHE SESSION_VALUE NULL GLOBAL_VALUE 256 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 256 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The soft upper limit for number of cached stored routines for one connection. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 524288 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME STRICT_PASSWORD_VALIDATION SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT When password validation plugins are enabled, reject passwords that cannot be validated (passwords specified as a hash) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME SYNC_BINLOG SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Synchronously flush binary log to disk after every #th event. Use 0 (default) to disable synchronous flushing NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SYNC_FRM SESSION_VALUE NULL GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Sync .frm files to disk on creation NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME SYNC_MASTER_INFO SESSION_VALUE NULL GLOBAL_VALUE 10000 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 10000 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Synchronously flush master info to disk after every #th event. Use 0 to disable synchronous flushing NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SYSTEM_VERSIONING_ALTER_HISTORY SESSION_VALUE ERROR GLOBAL_VALUE ERROR GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ERROR VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Versioning ALTER TABLE mode. ERROR: Fail ALTER with error; KEEP: Keep historical system rows and subject them to ALTER NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST ERROR,KEEP READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME SYSTEM_VERSIONING_ASOF SESSION_VALUE DEFAULT GLOBAL_VALUE DEFAULT GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE DEFAULT VARIABLE_SCOPE SESSION VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Default value for the FOR SYSTEM_TIME AS OF clause NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST DEFAULT READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME TABLE_DEFINITION_CACHE SESSION_VALUE NULL GLOBAL_VALUE 400 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 400 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of cached table definitions NUMERIC_MIN_VALUE 400 NUMERIC_MAX_VALUE 2097152 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TABLE_OPEN_CACHE SESSION_VALUE NULL GLOBAL_VALUE 100 GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE 2000 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of cached open tables NUMERIC_MIN_VALUE 10 NUMERIC_MAX_VALUE 1048576 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TABLE_OPEN_CACHE_INSTANCES SESSION_VALUE NULL GLOBAL_VALUE 8 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 8 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT Maximum number of table cache instances NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 64 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TCP_KEEPALIVE_INTERVAL SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT VARIABLE_COMMENT The interval, in seconds, between when successive keep-alive packets are sent if no acknowledgement is received.If set to 0, system dependent default is used. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 2147483 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TCP_KEEPALIVE_PROBES SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT VARIABLE_COMMENT The number of unacknowledged probes to send before considering the connection dead and notifying the application layer.If set to 0, system dependent default is used. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 2147483 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TCP_KEEPALIVE_TIME SESSION_VALUE NULL GLOBAL_VALUE 0 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT VARIABLE_COMMENT Timeout, in milliseconds, with no activity until the first TCP keep-alive packet is sent.If set to 0, system dependent default is used. NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 2147483 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME THREAD_CACHE_SIZE SESSION_VALUE NULL GLOBAL_VALUE 151 GLOBAL_VALUE_ORIGIN AUTO DEFAULT_VALUE 256 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT How many threads we should keep in a cache for reuse. These are freed after 5 minutes of idle time NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 16384 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME THREAD_CONCURRENCY SESSION_VALUE NULL GLOBAL_VALUE 10 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 10 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Permits the application to give the threads system a hint for the desired number of threads that should be run at the same time.This variable has no effect, and is deprecated. It will be removed in a future release. NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 512 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME THREAD_HANDLING SESSION_VALUE NULL GLOBAL_VALUE no-threads GLOBAL_VALUE_ORIGIN AUTO DEFAULT_VALUE one-thread-per-connection VARIABLE_SCOPE GLOBAL VARIABLE_TYPE ENUM VARIABLE_COMMENT Define threads usage for handling queries NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST one-thread-per-connection,no-threads READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME THREAD_STACK SESSION_VALUE NULL GLOBAL_VALUE 299008 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 299008 VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The stack size for each thread NUMERIC_MIN_VALUE 131072 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TIMED_MUTEXES SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Specify whether to time mutexes. Deprecated, has no effect. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME TIMESTAMP SESSION_VALUE 1409578823.000000 GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 0.000000 VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE DOUBLE VARIABLE_COMMENT Set the time for this client NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 2147483647 NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME TIME_FORMAT SESSION_VALUE NULL GLOBAL_VALUE %H:%i:%s GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE %H:%i:%s VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The TIME format (ignored) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TIME_ZONE SESSION_VALUE +00:00 GLOBAL_VALUE SYSTEM GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE SYSTEM VARIABLE_SCOPE SESSION VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The current time zone, used to initialize the time zone for a client when it connects. Set to SYSTEM by default, in which the client uses the system time zone value. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME TMPDIR SESSION_VALUE NULL GLOBAL_VALUE PATH GLOBAL_VALUE_ORIGIN CONFIG DEFAULT_VALUE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Path for temporary files. Several paths may be specified, separated by a colon (:), in this case they are used in a round-robin fashion NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TMP_DISK_TABLE_SIZE SESSION_VALUE 18446744073709551615 GLOBAL_VALUE 18446744073709551615 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 18446744073709551615 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Max size for data for an internal temporary on-disk MyISAM or Aria table. NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TMP_MEMORY_TABLE_SIZE SESSION_VALUE 16777216 GLOBAL_VALUE 16777216 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 16777216 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT If an internal in-memory temporary table exceeds this size, MariaDB will automatically convert it to an on-disk MyISAM or Aria table. Same as tmp_table_size. NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TMP_TABLE_SIZE SESSION_VALUE 16777216 GLOBAL_VALUE 16777216 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 16777216 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Alias for tmp_memory_table_size. If an internal in-memory temporary table exceeds this size, MariaDB will automatically convert it to an on-disk MyISAM or Aria table. NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TRANSACTION_ALLOC_BLOCK_SIZE SESSION_VALUE 8192 GLOBAL_VALUE 8192 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 8192 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Allocation block size for transactions to be stored in binary log NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 134217728 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TRANSACTION_PREALLOC_SIZE SESSION_VALUE 4096 GLOBAL_VALUE 4096 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 4096 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Persistent buffer for transactions to be stored in binary log NUMERIC_MIN_VALUE 1024 NUMERIC_MAX_VALUE 134217728 NUMERIC_BLOCK_SIZE 1024 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME TX_ISOLATION SESSION_VALUE REPEATABLE-READ GLOBAL_VALUE REPEATABLE-READ GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE REPEATABLE-READ VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Default transaction isolation level NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST READ-UNCOMMITTED,READ-COMMITTED,REPEATABLE-READ,SERIALIZABLE READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME TX_READ_ONLY SESSION_VALUE OFF GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Default transaction access mode. If set to OFF, the default, access is read/write. If set to ON, access is read-only. The SET TRANSACTION statement can also change the value of this variable. See SET TRANSACTION and START TRANSACTION. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME UNIQUE_CHECKS SESSION_VALUE ON GLOBAL_VALUE ON GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE ON VARIABLE_SCOPE SESSION VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT If set to 1, the default, secondary indexes in InnoDB tables are performed. If set to 0, storage engines can (but are not required to) assume that duplicate keys are not present in input data. Set to 0 to speed up imports of large tables to InnoDB. The storage engine will still issue a duplicate key error if it detects one, even if set to 0. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME UPDATABLE_VIEWS_WITH_LIMIT SESSION_VALUE YES GLOBAL_VALUE YES GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE YES VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT YES = Don't issue an error message (warning only) if a VIEW without presence of a key of the underlying table is used in queries with a LIMIT clause for updating. NO = Prohibit update of a VIEW, which does not contain a key of the underlying table and the query uses a LIMIT clause (usually get from GUI tools) NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NO,YES READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME USERSTAT SESSION_VALUE NULL GLOBAL_VALUE OFF GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE OFF VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Enables statistics gathering for USER_STATISTICS, CLIENT_STATISTICS, INDEX_STATISTICS and TABLE_STATISTICS tables in the INFORMATION_SCHEMA NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY NO COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME USE_STAT_TABLES SESSION_VALUE NEVER GLOBAL_VALUE NEVER GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NEVER VARIABLE_SCOPE SESSION VARIABLE_TYPE ENUM VARIABLE_COMMENT Specifies how to use system statistics tables NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NEVER,COMPLEMENTARY,PREFERABLY READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME WAIT_TIMEOUT SESSION_VALUE 28800 GLOBAL_VALUE 28800 GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE 28800 VARIABLE_SCOPE SESSION VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of seconds the server waits for activity on a connection before closing it NUMERIC_MIN_VALUE 1 NUMERIC_MAX_VALUE 31536000 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME WARNING_COUNT SESSION_VALUE 0 GLOBAL_VALUE NULL GLOBAL_VALUE_ORIGIN COMPILE-TIME DEFAULT_VALUE NULL VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT The number of errors, warnings, and notes that resulted from the last statement that generated messages NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL select VARIABLE_NAME, VARIABLE_SCOPE, VARIABLE_TYPE, VARIABLE_COMMENT, NUMERIC_MIN_VALUE, NUMERIC_MAX_VALUE, NUMERIC_BLOCK_SIZE, ENUM_VALUE_LIST, READ_ONLY, COMMAND_LINE_ARGUMENT from information_schema.system_variables where variable_name in ( 'have_openssl', 'have_symlink', 'hostname', 'large_files_support', 'lower_case_file_system', 'lower_case_table_names', 'open_files_limit', 'rand_seed1', 'rand_seed2', 'system_time_zone', 'version_comment', 'version_source_revision', 'version_compile_machine', 'version_compile_os', 'version_malloc_library', 'version_ssl_library', 'version' ) order by variable_name; VARIABLE_NAME HAVE_OPENSSL VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Comparing have_openssl with have_ssl will indicate whether YaSSL or openssl was used. If YaSSL, have_ssl will be YES, but have_openssl will be NO. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HAVE_SYMLINK VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT If symbolic link support is enabled, will be set to YES, otherwise will be set to NO. Required for the INDEX DIRECTORY and DATA DIRECTORY table options (see CREATE TABLE) and Windows symlink support. Will be set to DISABLED if the server is started with the --skip-symbolic-links option. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME HOSTNAME VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Server host name NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LARGE_FILES_SUPPORT VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Whether mysqld was compiled with options for large file support NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LOWER_CASE_FILE_SYSTEM VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BOOLEAN VARIABLE_COMMENT Case sensitivity of file names on the file system where the data directory is located NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST OFF,ON READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME LOWER_CASE_TABLE_NAMES VARIABLE_SCOPE GLOBAL VARIABLE_TYPE INT UNSIGNED VARIABLE_COMMENT If set to 1 table names are stored in lowercase on disk and table names will be case-insensitive. Should be set to 2 if you are using a case insensitive file system NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 2 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT OPTIONAL VARIABLE_NAME OPEN_FILES_LIMIT VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT If this is not 0, then mysqld will use this value to reserve file descriptors to use with setrlimit(). If this value is 0 or autoset then mysqld will reserve max_connections*5 or max_connections + table_cache*2 (whichever is larger) number of file descriptors NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 4294967295 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED VARIABLE_NAME RAND_SEED1 VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Sets the internal state of the RAND() generator for replication purposes NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME RAND_SEED2 VARIABLE_SCOPE SESSION ONLY VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Sets the internal state of the RAND() generator for replication purposes NUMERIC_MIN_VALUE 0 NUMERIC_MAX_VALUE 18446744073709551615 NUMERIC_BLOCK_SIZE 1 ENUM_VALUE_LIST NULL READ_ONLY NO COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME SYSTEM_TIME_ZONE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The server system time zone NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME VERSION VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Server version number. It may also include a suffix with configuration or build information. -debug indicates debugging support was enabled on the server, and -log indicates at least one of the binary log, general log or slow query log are enabled, for example 10.1.1-MariaDB-mariadb1precise-log. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME VERSION_COMMENT VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Value of the COMPILATION_COMMENT option specified by CMake when building MariaDB, for example mariadb.org binary distribution. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME VERSION_COMPILE_MACHINE VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT The machine type or architecture MariaDB was built on, for example i686. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME VERSION_COMPILE_OS VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Operating system that MariaDB was built on, for example debian-linux-gnu. NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME VERSION_MALLOC_LIBRARY VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Version of the used malloc library NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME VERSION_SOURCE_REVISION VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Source control revision id for MariaDB source code NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL VARIABLE_NAME VERSION_SSL_LIBRARY VARIABLE_SCOPE GLOBAL VARIABLE_TYPE VARCHAR VARIABLE_COMMENT Version of the used SSL library NUMERIC_MIN_VALUE NULL NUMERIC_MAX_VALUE NULL NUMERIC_BLOCK_SIZE NULL ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT NULL select VARIABLE_NAME, GLOBAL_VALUE_ORIGIN, VARIABLE_SCOPE, VARIABLE_TYPE, VARIABLE_COMMENT, ENUM_VALUE_LIST, READ_ONLY, COMMAND_LINE_ARGUMENT from information_schema.system_variables where variable_name in ( 'log_tc_size' ) order by variable_name; VARIABLE_NAME LOG_TC_SIZE GLOBAL_VALUE_ORIGIN AUTO VARIABLE_SCOPE GLOBAL VARIABLE_TYPE BIGINT UNSIGNED VARIABLE_COMMENT Size of transaction coordinator log. ENUM_VALUE_LIST NULL READ_ONLY YES COMMAND_LINE_ARGUMENT REQUIRED set global div_precision_increment=default;