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mariadb/mysql-test/suite/sys_vars/r/sysvars_innodb.result
Sergei Golubchik b565b3e7e0 Merge branch '11.4' into 11.8
2025-07-28 21:29:29 +02:00

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select VARIABLE_NAME, SESSION_VALUE, DEFAULT_VALUE, 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 like 'innodb%' and
variable_name not in (
'innodb_numa_interleave', # only available WITH_NUMA
'innodb_evict_tables_on_commit_debug', # one may want to override this
'innodb_use_native_aio', # default value depends on OS
'innodb_log_file_buffering', # only available on Linux and Windows
'innodb_linux_aio', # existence depends on OS
'innodb_buffer_pool_load_pages_abort') # debug build only, and is only for testing
order by variable_name;
VARIABLE_NAME INNODB_ADAPTIVE_FLUSHING
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Attempt flushing dirty pages to avoid IO bursts at checkpoints
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 INNODB_ADAPTIVE_FLUSHING_LWM
SESSION_VALUE NULL
DEFAULT_VALUE 10.000000
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE DOUBLE
VARIABLE_COMMENT Percentage of log capacity below which no adaptive flushing happens
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 70
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_ADAPTIVE_HASH_INDEX
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable InnoDB adaptive hash index (disabled by default)
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 INNODB_ADAPTIVE_HASH_INDEX_PARTS
SESSION_VALUE NULL
DEFAULT_VALUE 8
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Number of InnoDB Adaptive Hash Index Partitions (default 8)
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 512
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_ALTER_COPY_BULK
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Allow bulk insert operation for copy alter operation
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 INNODB_AUTOEXTEND_INCREMENT
SESSION_VALUE NULL
DEFAULT_VALUE 64
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Data file autoextend increment in megabytes
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 1000
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_AUTOINC_LOCK_MODE
SESSION_VALUE NULL
DEFAULT_VALUE 1
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT
VARIABLE_COMMENT The AUTOINC lock modes supported by InnoDB: 0 => Old style AUTOINC locking (for backward compatibility); 1 => New style AUTOINC locking; 2 => No AUTOINC locking (unsafe for SBR)
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 2
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUFFER_POOL_CHUNK_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Deprecated parameter with no effect
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 1048576
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUFFER_POOL_DUMP_AT_SHUTDOWN
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Dump the buffer pool into a file named @@innodb_buffer_pool_filename
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUFFER_POOL_DUMP_NOW
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Trigger an immediate dump of the buffer pool into a file named @@innodb_buffer_pool_filename
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUFFER_POOL_DUMP_PCT
SESSION_VALUE NULL
DEFAULT_VALUE 25
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Dump only the hottest N% of each buffer pool, defaults to 25
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 100
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUFFER_POOL_EVICT
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Evict pages from the buffer pool
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 INNODB_BUFFER_POOL_FILENAME
SESSION_VALUE NULL
DEFAULT_VALUE ib_buffer_pool
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Filename to/from which to dump/load the InnoDB buffer pool
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 INNODB_BUFFER_POOL_LOAD_ABORT
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Abort a currently running load of the buffer pool
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUFFER_POOL_LOAD_AT_STARTUP
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Load the buffer pool from a file named @@innodb_buffer_pool_filename
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 INNODB_BUFFER_POOL_LOAD_NOW
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Trigger an immediate load of the buffer pool from a file named @@innodb_buffer_pool_filename
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUFFER_POOL_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 134217728
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT The size of the memory buffer InnoDB uses to cache data and indexes of its tables
NUMERIC_MIN_VALUE 2097152
NUMERIC_MAX_VALUE 18446744073701163008
NUMERIC_BLOCK_SIZE 1048576
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUFFER_POOL_SIZE_AUTO_MIN
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Minimum innodb_buffer_pool_size for dynamic shrinking on memory pressure
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 18446744073701163008
NUMERIC_BLOCK_SIZE 8388608
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUFFER_POOL_SIZE_MAX
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Maximum innodb_buffer_pool_size
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 18446744073701163008
NUMERIC_BLOCK_SIZE 8388608
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUF_DUMP_STATUS_FREQUENCY
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT A number that tells how often buffer pool dump status in percentages should be printed. E.g. 10 means that buffer pool dump status is printed when every 10% of number of buffer pool pages are dumped. Default is 0 (only start and end status is printed)
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 100
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_BUF_FLUSH_LIST_NOW
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Force dirty page flush now
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 INNODB_CHECKSUM_ALGORITHM
SESSION_VALUE NULL
DEFAULT_VALUE full_crc32
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE ENUM
VARIABLE_COMMENT The algorithm InnoDB uses for page checksumming. Possible values are FULL_CRC32 for new files, always use CRC-32C; for old, see CRC32 below; STRICT_FULL_CRC32 for new files, always use CRC-32C; for old, see STRICT_CRC32 below; CRC32 write crc32, allow previously used algorithms to match when reading; STRICT_CRC32 write crc32, do not allow other algorithms to match when reading; New files created with full_crc32 are readable by MariaDB 10.4.3+
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST crc32,strict_crc32,full_crc32,strict_full_crc32
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_CMP_PER_INDEX_ENABLED
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable INFORMATION_SCHEMA.innodb_cmp_per_index, may have negative impact on performance (off by default)
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 INNODB_COMPRESSION_ALGORITHM
SESSION_VALUE NULL
DEFAULT_VALUE zlib
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE ENUM
VARIABLE_COMMENT Compression algorithm used on page compression. One of: none, zlib, lz4, lzo, lzma, bzip2, or snappy
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST none,zlib,lz4,lzo,lzma,bzip2,snappy
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_COMPRESSION_DEFAULT
SESSION_VALUE OFF
DEFAULT_VALUE OFF
VARIABLE_SCOPE SESSION
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Is compression the default for new tables
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 INNODB_COMPRESSION_FAILURE_THRESHOLD_PCT
SESSION_VALUE NULL
DEFAULT_VALUE 5
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT If the compression failure rate of a table is greater than this number more padding is added to the pages to reduce the failures. A value of zero implies no padding
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 100
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_COMPRESSION_LEVEL
SESSION_VALUE NULL
DEFAULT_VALUE 6
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Compression level used for zlib compression. 0 is no compression, 1 is fastest, 9 is best compression and default is 6
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 9
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_COMPRESSION_PAD_PCT_MAX
SESSION_VALUE NULL
DEFAULT_VALUE 50
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Percentage of empty space on a data page that can be reserved to make the page compressible
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 75
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_DATA_FILE_BUFFERING
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Whether the file system cache for data files is enabled
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 INNODB_DATA_FILE_PATH
SESSION_VALUE NULL
DEFAULT_VALUE ibdata1:12M:autoextend
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Path to individual files and their sizes
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 INNODB_DATA_FILE_SIZE_DEBUG
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT InnoDB system tablespace size to be set in recovery
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 268435456
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_DATA_FILE_WRITE_THROUGH
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Whether each write to data files writes through
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 INNODB_DATA_HOME_DIR
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT The common part for InnoDB table spaces
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 INNODB_DEADLOCK_DETECT
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable/disable InnoDB deadlock detector (default ON). if set to OFF, deadlock detection is skipped, and we rely on innodb_lock_wait_timeout in case of deadlock
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 INNODB_DEADLOCK_REPORT
SESSION_VALUE NULL
DEFAULT_VALUE full
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE ENUM
VARIABLE_COMMENT How to report deadlocks (if innodb_deadlock_detect=ON)
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST off,basic,full
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_DEFAULT_ENCRYPTION_KEY_ID
SESSION_VALUE 1
DEFAULT_VALUE 1
VARIABLE_SCOPE SESSION
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Default encryption key id used for table encryption
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_DEFAULT_ROW_FORMAT
SESSION_VALUE NULL
DEFAULT_VALUE dynamic
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE ENUM
VARIABLE_COMMENT The default ROW FORMAT for all innodb tables created without explicit ROW_FORMAT. Possible values are REDUNDANT, COMPACT, and DYNAMIC. The ROW_FORMAT value COMPRESSED is not allowed
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST redundant,compact,dynamic
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_DISABLE_SORT_FILE_CACHE
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Whether to disable OS system file cache for sort I/O
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 INNODB_DOUBLEWRITE
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE ENUM
VARIABLE_COMMENT Whether and how to use the doublewrite buffer. OFF=Assume that writes of innodb_page_size are atomic; ON=Prevent torn writes (the default); fast=Like ON, but do not synchronize writes to data files
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON,fast
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_ENABLE_XAP_UNLOCK_UNMODIFIED_FOR_PRIMARY_DEBUG
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Unlock unmodified records on XA PREPARE for primary
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 INNODB_ENCRYPTION_ROTATE_KEY_AGE
SESSION_VALUE NULL
DEFAULT_VALUE 1
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Key rotation - re-encrypt in background all pages that were encrypted with a key that many (or more) versions behind. Value 0 indicates that key rotation is disabled
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_ENCRYPTION_ROTATION_IOPS
SESSION_VALUE NULL
DEFAULT_VALUE 100
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Use this many iops for background key rotation
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_ENCRYPTION_THREADS
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Number of threads performing background key rotation
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 255
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_ENCRYPT_LOG
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable redo log encryption
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 INNODB_ENCRYPT_TABLES
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE ENUM
VARIABLE_COMMENT Enable encryption for tables. Don't forget to enable --innodb-encrypt-log too
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON,FORCE
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_ENCRYPT_TEMPORARY_TABLES
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Encrypt the temporary table data
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 INNODB_FAST_SHUTDOWN
SESSION_VALUE NULL
DEFAULT_VALUE 1
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Speeds up the shutdown process of the InnoDB storage engine. Possible values are 0, 1 (faster), 2 (crash-like), 3 (fastest clean)
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 3
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_FATAL_SEMAPHORE_WAIT_THRESHOLD
SESSION_VALUE NULL
DEFAULT_VALUE 600
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Maximum number of seconds that semaphore times out in InnoDB
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FILE_PER_TABLE
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Stores each InnoDB table to an .ibd file in the database dir
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 INNODB_FILL_FACTOR
SESSION_VALUE NULL
DEFAULT_VALUE 100
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Percentage of B-tree page filled during bulk insert
NUMERIC_MIN_VALUE 10
NUMERIC_MAX_VALUE 100
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FIL_MAKE_PAGE_DIRTY_DEBUG
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Make the first page of the given tablespace dirty
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_FLUSHING_AVG_LOOPS
SESSION_VALUE NULL
DEFAULT_VALUE 30
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Number of iterations over which the background flushing is averaged
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 1000
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FLUSH_LOG_AT_TIMEOUT
SESSION_VALUE NULL
DEFAULT_VALUE 1
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Write and flush logs every (n) second
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 2700
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_FLUSH_LOG_AT_TRX_COMMIT
SESSION_VALUE NULL
DEFAULT_VALUE 1
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Controls the durability/speed trade-off for commits. Set to 0 (write and flush redo log to disk only once per second), 1 (flush to disk at each commit), 2 (write to log at commit but flush to disk only once per second) or 3 (flush to disk at prepare and at commit, slower and usually redundant). 1 and 3 guarantees that after a crash, committed transactions will not be lost and will be consistent with the binlog and other transactional engines. 2 can get inconsistent and lose transactions if there is a power failure or kernel crash but not if mysqld crashes. 0 has no guarantees in case of crash. 0 and 2 can be faster than 1 or 3
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 3
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_FLUSH_METHOD
SESSION_VALUE NULL
DEFAULT_VALUE O_DIRECT
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE ENUM
VARIABLE_COMMENT With which method to flush data
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST fsync,O_DSYNC,littlesync,nosync,O_DIRECT,O_DIRECT_NO_FSYNC
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FLUSH_NEIGHBORS
SESSION_VALUE NULL
DEFAULT_VALUE 1
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Set to 0 (don't flush neighbors from buffer pool), 1 (flush contiguous neighbors from buffer pool) or 2 (flush neighbors from buffer pool), when flushing a block
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 2
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_FLUSH_SYNC
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Allow IO bursts at the checkpoints ignoring io_capacity setting
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 INNODB_FORCE_PRIMARY_KEY
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Do not allow creating a table without primary key (off by default)
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 INNODB_FORCE_RECOVERY
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Helps to save your data in case the disk image of the database becomes corrupt. Value 5 can return bogus data, and 6 can permanently corrupt data
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 6
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FT_AUX_TABLE
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT FTS internal auxiliary table to be checked
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 INNODB_FT_CACHE_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 8000000
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT InnoDB Fulltext search cache size in bytes
NUMERIC_MIN_VALUE 1600000
NUMERIC_MAX_VALUE 1099511627776
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FT_ENABLE_DIAG_PRINT
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Whether to enable additional FTS diagnostic printout
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 INNODB_FT_ENABLE_STOPWORD
SESSION_VALUE ON
DEFAULT_VALUE ON
VARIABLE_SCOPE SESSION
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Create FTS index with stopword
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 INNODB_FT_MAX_TOKEN_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 84
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT InnoDB Fulltext search maximum token size in characters
NUMERIC_MIN_VALUE 10
NUMERIC_MAX_VALUE 84
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FT_MIN_TOKEN_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 3
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT InnoDB Fulltext search minimum token size in characters
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 16
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FT_NUM_WORD_OPTIMIZE
SESSION_VALUE NULL
DEFAULT_VALUE 2000
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT InnoDB Fulltext search number of words to optimize for each optimize table call
NUMERIC_MIN_VALUE 1000
NUMERIC_MAX_VALUE 10000
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_FT_RESULT_CACHE_LIMIT
SESSION_VALUE NULL
DEFAULT_VALUE 2000000000
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT InnoDB Fulltext search query result cache limit in bytes
NUMERIC_MIN_VALUE 1000000
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FT_SERVER_STOPWORD_TABLE
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT The user supplied stopword table name
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_FT_SORT_PLL_DEGREE
SESSION_VALUE NULL
DEFAULT_VALUE 2
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT InnoDB Fulltext search parallel sort degree, will round up to nearest power of 2 number
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 16
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FT_TOTAL_CACHE_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 640000000
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Total memory allocated for InnoDB Fulltext Search cache
NUMERIC_MIN_VALUE 32000000
NUMERIC_MAX_VALUE 1099511627776
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_FT_USER_STOPWORD_TABLE
SESSION_VALUE
DEFAULT_VALUE
VARIABLE_SCOPE SESSION
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT User supplied stopword table name, effective in the session level
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_IMMEDIATE_SCRUB_DATA_UNCOMPRESSED
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable scrubbing of data
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_INSTANT_ALTER_COLUMN_ALLOWED
SESSION_VALUE NULL
DEFAULT_VALUE add_drop_reorder
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE ENUM
VARIABLE_COMMENT File format constraint for ALTER TABLE
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST never,add_last,add_drop_reorder
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_IO_CAPACITY
SESSION_VALUE NULL
DEFAULT_VALUE 200
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Number of IOPs the server can do. Tunes the background IO rate
NUMERIC_MIN_VALUE 100
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_IO_CAPACITY_MAX
SESSION_VALUE NULL
DEFAULT_VALUE 4294967295
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Limit to which innodb_io_capacity can be inflated
NUMERIC_MIN_VALUE 100
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Artificially limit the number of records per B-tree page (0=unlimited)
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_LOCK_WAIT_TIMEOUT
SESSION_VALUE 50
DEFAULT_VALUE 50
VARIABLE_SCOPE SESSION
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Timeout in seconds an InnoDB transaction may wait for a lock before being rolled back. The value 100000000 is infinite timeout
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 100000000
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_LOG_BUFFER_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 16777216
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Redo log buffer size in bytes
NUMERIC_MIN_VALUE 2097152
NUMERIC_MAX_VALUE 2147479552
NUMERIC_BLOCK_SIZE 4096
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_LOG_CHECKPOINT_NOW
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Write back dirty pages from the buffer pool and update the log checkpoint
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 INNODB_LOG_FILE_MMAP
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Whether ib_logfile0 resides in persistent memory (when supported) or should initially be memory-mapped
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 INNODB_LOG_FILE_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 100663296
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Redo log size in bytes
NUMERIC_MIN_VALUE 4194304
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 4096
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_LOG_FILE_WRITE_THROUGH
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Whether each write to ib_logfile0 is write through
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 INNODB_LOG_GROUP_HOME_DIR
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Path to ib_logfile0
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 INNODB_LOG_SPIN_WAIT_DELAY
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Deprecated parameter with no effect
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 6000
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_LOG_WRITE_AHEAD_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 512
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Redo log write size to avoid read-on-write; must be a power of two
NUMERIC_MIN_VALUE 512
NUMERIC_MAX_VALUE 4096
NUMERIC_BLOCK_SIZE 1
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_LRU_FLUSH_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 32
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Unused
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT NULL
VARIABLE_NAME INNODB_LRU_SCAN_DEPTH
SESSION_VALUE NULL
DEFAULT_VALUE 1536
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT How deep to scan LRU to keep it clean
NUMERIC_MIN_VALUE 100
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_MAX_DIRTY_PAGES_PCT
SESSION_VALUE NULL
DEFAULT_VALUE 90.000000
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE DOUBLE
VARIABLE_COMMENT Percentage of dirty pages allowed in bufferpool
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 99.999
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_MAX_DIRTY_PAGES_PCT_LWM
SESSION_VALUE NULL
DEFAULT_VALUE 0.000000
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE DOUBLE
VARIABLE_COMMENT Percentage of dirty pages at which flushing kicks in. The value 0 (default) means 'refer to innodb_max_dirty_pages_pct'
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 99.999
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_MAX_PURGE_LAG
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Desired maximum length of the purge queue (0 = no limit)
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_MAX_PURGE_LAG_DELAY
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Maximum delay of user threads in micro-seconds
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 10000000
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_MAX_PURGE_LAG_WAIT
SESSION_VALUE NULL
DEFAULT_VALUE 4294967295
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Wait until History list length is below the specified limit
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_MAX_UNDO_LOG_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 10485760
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Desired maximum UNDO tablespace size in bytes
NUMERIC_MIN_VALUE 10485760
NUMERIC_MAX_VALUE 281474976710656
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_MERGE_THRESHOLD_SET_ALL_DEBUG
SESSION_VALUE NULL
DEFAULT_VALUE 50
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Override current MERGE_THRESHOLD setting for all indexes at dictionary cache by the specified value dynamically, at the time
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 50
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_MONITOR_DISABLE
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Turn off a monitor counter
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 INNODB_MONITOR_ENABLE
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Turn on a monitor counter
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 INNODB_MONITOR_RESET
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Reset a monitor counter
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 INNODB_MONITOR_RESET_ALL
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Reset all values for a monitor counter
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 INNODB_OLD_BLOCKS_PCT
SESSION_VALUE NULL
DEFAULT_VALUE 37
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Percentage of the buffer pool to reserve for 'old' blocks
NUMERIC_MIN_VALUE 5
NUMERIC_MAX_VALUE 95
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_OLD_BLOCKS_TIME
SESSION_VALUE NULL
DEFAULT_VALUE 1000
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Move blocks to the 'new' end of the buffer pool if the first access was at least this many milliseconds ago. The timeout is disabled if 0
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_ONLINE_ALTER_LOG_MAX_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 134217728
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Maximum modification log file size for online index creation
NUMERIC_MIN_VALUE 65536
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_OPEN_FILES
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT How many files at the maximum InnoDB keeps open at the same time
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 9223372036854775807
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_OPTIMIZE_FULLTEXT_ONLY
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Only optimize the Fulltext index of the table
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 INNODB_PAGE_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 16384
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Page size to use for all InnoDB tablespaces
NUMERIC_MIN_VALUE 4096
NUMERIC_MAX_VALUE 65536
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Unused
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 INNODB_PRINT_ALL_DEADLOCKS
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Print all deadlocks to MariaDB error log (off by default)
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 INNODB_PURGE_BATCH_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 127
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Number of UNDO log pages to purge in one batch from the history list
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 5000
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_PURGE_RSEG_TRUNCATE_FREQUENCY
SESSION_VALUE NULL
DEFAULT_VALUE 128
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Unused
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 128
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT NULL
VARIABLE_NAME INNODB_PURGE_THREADS
SESSION_VALUE NULL
DEFAULT_VALUE 4
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Number of tasks for purging transaction history
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 32
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_RANDOM_READ_AHEAD
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Whether to use read ahead for random access within an extent
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 INNODB_READ_AHEAD_THRESHOLD
SESSION_VALUE NULL
DEFAULT_VALUE 56
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Number of pages that must be accessed sequentially for InnoDB to trigger a readahead
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 64
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_READ_IO_THREADS
SESSION_VALUE NULL
DEFAULT_VALUE 4
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Number of background read I/O threads in InnoDB
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 64
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_READ_ONLY
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Start InnoDB in read only mode (off by default)
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 INNODB_READ_ONLY_COMPRESSED
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Make ROW_FORMAT=COMPRESSED tables read-only
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 INNODB_ROLLBACK_ON_TIMEOUT
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Roll back the complete transaction on lock wait timeout, for 4.x compatibility (disabled by default)
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 INNODB_SAVED_PAGE_NUMBER_DEBUG
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT An InnoDB page number
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_SNAPSHOT_ISOLATION
SESSION_VALUE ON
DEFAULT_VALUE ON
VARIABLE_SCOPE SESSION
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Use snapshot isolation (write-write conflict detection)
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 INNODB_SORT_BUFFER_SIZE
SESSION_VALUE NULL
DEFAULT_VALUE 1048576
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Memory buffer size for index creation
NUMERIC_MIN_VALUE 65536
NUMERIC_MAX_VALUE 67108864
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_SPIN_WAIT_DELAY
SESSION_VALUE NULL
DEFAULT_VALUE 4
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Maximum delay between polling for a spin lock (4 by default)
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 6000
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_STATS_AUTO_RECALC
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT InnoDB automatic recalculation of persistent statistics enabled for all tables unless overridden at table level (automatic recalculation is only done when InnoDB decides that the table has changed too much and needs a new statistics)
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 INNODB_STATS_INCLUDE_DELETE_MARKED
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Include delete marked records when calculating persistent statistics
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 INNODB_STATS_METHOD
SESSION_VALUE NULL
DEFAULT_VALUE nulls_equal
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE ENUM
VARIABLE_COMMENT Specifies how InnoDB index statistics collection code should treat NULLs. Possible values are NULLS_EQUAL (default), NULLS_UNEQUAL and NULLS_IGNORED
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST nulls_equal,nulls_unequal,nulls_ignored
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_STATS_MODIFIED_COUNTER
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT The number of rows modified before we calculate new statistics (default 0 = current limits)
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_STATS_ON_METADATA
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable statistics gathering for metadata commands such as SHOW TABLE STATUS for tables that use transient statistics (off by default)
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 INNODB_STATS_PERSISTENT
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT InnoDB persistent statistics enabled for all tables unless overridden at table level
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 INNODB_STATS_PERSISTENT_SAMPLE_PAGES
SESSION_VALUE NULL
DEFAULT_VALUE 20
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT The number of leaf index pages to sample when calculating persistent statistics (by ANALYZE, default 20)
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_STATS_TRADITIONAL
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable traditional statistic calculation based on number of configured pages (default true)
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_STATS_TRANSIENT_SAMPLE_PAGES
SESSION_VALUE NULL
DEFAULT_VALUE 8
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT The number of leaf index pages to sample when calculating transient statistics (if persistent statistics are not used, default 8)
NUMERIC_MIN_VALUE 1
NUMERIC_MAX_VALUE 4294967295
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_STATUS_OUTPUT
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable InnoDB monitor output to the error log
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 INNODB_STATUS_OUTPUT_LOCKS
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable InnoDB lock monitor output to the error log. Requires innodb_status_output=ON
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 INNODB_STRICT_MODE
SESSION_VALUE ON
DEFAULT_VALUE ON
VARIABLE_SCOPE SESSION
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Use strict mode when evaluating create 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 INNODB_SYNC_SPIN_LOOPS
SESSION_VALUE NULL
DEFAULT_VALUE 30
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Count of spin-loop rounds in InnoDB mutexes (30 by default)
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 18446744073709551615
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_TABLE_LOCKS
SESSION_VALUE ON
DEFAULT_VALUE ON
VARIABLE_SCOPE SESSION
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable InnoDB locking in LOCK TABLES
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 INNODB_TEMP_DATA_FILE_PATH
SESSION_VALUE NULL
DEFAULT_VALUE ibtmp1:12M:autoextend
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Path to files and their sizes making temp-tablespace
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 INNODB_TMPDIR
SESSION_VALUE
DEFAULT_VALUE
VARIABLE_SCOPE SESSION
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Directory for temporary non-tablespace files
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME INNODB_TRUNCATE_TEMPORARY_TABLESPACE_NOW
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Shrink the temporary tablespace
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 INNODB_TRX_PURGE_VIEW_UPDATE_ONLY_DEBUG
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Pause actual purging any delete-marked records, but merely update the purge view. It is to create artificially the situation the purge view have been updated but the each purges were not done yet
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 INNODB_TRX_RSEG_N_SLOTS_DEBUG
SESSION_VALUE NULL
DEFAULT_VALUE 0
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Debug flags for InnoDB to limit TRX_RSEG_N_SLOTS for trx_rsegf_undo_find_free()
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 1024
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT NULL
VARIABLE_NAME INNODB_UNDO_DIRECTORY
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT Directory where undo tablespace files live, this path can be absolute
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 INNODB_UNDO_LOG_TRUNCATE
SESSION_VALUE NULL
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable or Disable Truncate of UNDO tablespace
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 INNODB_UNDO_TABLESPACES
SESSION_VALUE NULL
DEFAULT_VALUE 3
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Number of undo tablespaces to use
NUMERIC_MIN_VALUE 0
NUMERIC_MAX_VALUE 127
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_USE_ATOMIC_WRITES
SESSION_VALUE NULL
DEFAULT_VALUE ON
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Enable atomic writes, instead of using the doublewrite buffer, for files on devices that supports atomic writes
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY YES
COMMAND_LINE_ARGUMENT NONE
VARIABLE_NAME INNODB_WRITE_IO_THREADS
SESSION_VALUE NULL
DEFAULT_VALUE 4
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE INT UNSIGNED
VARIABLE_COMMENT Number of background write I/O threads in InnoDB
NUMERIC_MIN_VALUE 2
NUMERIC_MAX_VALUE 64
NUMERIC_BLOCK_SIZE 0
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
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