mysqld Ver 5.6.11 for Linux on x86_64 (Source distribution)
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affiliates. Other names may be trademarks of their respective
owners.
Starts the MySQL database server.
Usage: mysqld [OPTIONS]
Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf
The following groups are read: mysqld server mysqld-5.6
The following options may be given as the first argument:
--print-defaults Print the program argument list and exit.
--no-defaults Don‘t read default options from any option file,
except for login file.
--defaults-file=# Only read default options from the given file #.
--defaults-extra-file=# Read this file after the global files are read.
--defaults-group-suffix=#
Also read groups with concat(group, suffix)
--login-path=# Read this path from the login file.
--abort-slave-event-count=#
Option used by mysql-test for debugging and testing of
replication.
--allow-suspicious-udfs
Allows use of UDFs consisting of only one symbol xxx()
without corresponding xxx_init() or xxx_deinit(). That
also means that one can load any function from any
library, for example exit() from libc.so
-a, --ansi Use ANSI SQL syntax instead of MySQL syntax. This mode
will also set transaction isolation level ‘serializable‘.
--archive[=name] Enable or disable ARCHIVE plugin. Possible values are ON,
OFF, FORCE (don‘t start if the plugin fails to load).
--auto-increment-increment[=#]
Auto-increment columns are incremented by this
--auto-increment-offset[=#]
Offset added to Auto-increment columns. Used when
auto-increment-increment != 1
--autocommit Set default value for autocommit (0 or 1)
(Defaults to on; use --skip-autocommit to disable.)
--automatic-sp-privileges
Creating and dropping stored procedures alters ACLs
(Defaults to on; use --skip-automatic-sp-privileges to disable.)
--back-log=# The number of outstanding connection requests MySQL can
have. This comes into play when the main MySQL thread
gets very many connection requests in a very short time
-b, --basedir=name Path to installation directory. All paths are usually
resolved relative to this
--big-tables Allow big result sets by saving all temporary sets on
file (Solves most ‘table full‘ errors)
--bind-address=name IP address to bind to.
--binlog-cache-size=#
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
--binlog-checksum=name
Type of BINLOG_CHECKSUM_ALG. Include checksum for log
events in the binary log. Possible values are NONE and
CRC32; default is CRC32.
--binlog-direct-non-transactional-updates
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.
--binlog-do-db=name Tells the master it should log updates for the specified
database, and exclude all others not explicitly
mentioned.
--binlog-format=name
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. If NDBCLUSTER is enabled and
binlog-format is MIXED, the format switches to row-based
and back implicitly per each query accessing an
NDBCLUSTER table
--binlog-ignore-db=name
Tells the master that updates to the given database
should not be logged to the binary log.
--binlog-max-flush-queue-time=#
The maximum time that the binary log group commit will
keep reading transactions before it flush the
transactions to the binary log (and optionally sync,
depending on the value of sync_binlog).
--binlog-order-commits
Issue internal commit calls in the same order as
transactions are written to the binary log. Default is to
order commits.
(Defaults to on; use --skip-binlog-order-commits to disable.)
--binlog-row-event-max-size=#
The maximum size of a row-based binary log event in
bytes. Rows will be grouped into events smaller than this
size if possible. The value has to be a multiple of 256.
--binlog-row-image=name
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).
--binlog-rows-query-log-events
Allow writing of Rows_query_log events into binary log.
--binlog-stmt-cache-size=#
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
--blackhole[=name] Enable or disable BLACKHOLE plugin. Possible values are
ON, OFF, FORCE (don‘t start if the plugin fails to load).
--bootstrap Used by mysql installation scripts.
--bulk-insert-buffer-size=#
Size of tree cache used in bulk insert optimisation. Note
that this is a limit per thread!
--character-set-client-handshake
Don‘t ignore client side character set value sent during
handshake.
(Defaults to on; use --skip-character-set-client-handshake to disable.)
--character-set-filesystem=name
Set the filesystem character set.
-C, --character-set-server=name
Set the default character set.
--character-sets-dir=name
Directory where character sets are
-r, --chroot=name Chroot mysqld daemon during startup.
--collation-server=name
Set the default collation.
--completion-type=name
The transaction completion type, one of NO_CHAIN, CHAIN,
RELEASE
--concurrent-insert[=name]
Use concurrent insert with MyISAM. Possible values are
NEVER, AUTO, ALWAYS
--connect-timeout=# The number of seconds the mysqld server is waiting for a
connect packet before responding with ‘Bad handshake‘
--console Write error output on screen; don‘t remove the console
window on windows.
--core-file Write core on errors.
-h, --datadir=name Path to the database root directory
--date-format=name The DATE format (ignored)
--datetime-format=name
The DATETIME format (ignored)
--default-authentication-plugin=name
Defines what password- and authentication algorithm to
use per default
--default-storage-engine=name
The default storage engine for new tables
--default-time-zone=name
Set the default time zone.
--default-tmp-storage-engine=name
The default storage engine for new explict temporary
tables
--default-week-format=#
The default week format used by WEEK() functions
--delay-key-write[=name]
Type of DELAY_KEY_WRITE
--delayed-insert-limit=#
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. This variable is deprecated along with
INSERT DELAYED.
--delayed-insert-timeout=#
How long a INSERT DELAYED thread should wait for INSERT
statements before terminating.This variable is deprecated
along with INSERT DELAYED.
--delayed-queue-size=#
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.This variable is deprecated along
with INSERT DELAYED.
--des-key-file=name Load keys for des_encrypt() and des_encrypt from given
file.
--disconnect-on-expired-password
Give clients that don‘t signal password expiration
support execution time error(s) instead of connection
error
(Defaults to on; use --skip-disconnect-on-expired-password to disable.)
--disconnect-slave-event-count=#
Option used by mysql-test for debugging and testing of
replication.
--div-precision-increment=#
Precision of the result of ‘/‘ operator will be increased
on that value
--end-markers-in-json
In JSON output ("EXPLAIN FORMAT=JSON" and optimizer
trace), if variable is set to 1, repeats the structure‘s
key (if it has one) near the closing bracket
--enforce-gtid-consistency
Prevents execution of statements that would be impossible
to log in a transactionally safe manner. Currently, the
disallowed statements include CREATE TEMPORARY TABLE
inside transactions, all updates to non-transactional
tables, and CREATE TABLE ... SELECT.
--eq-range-index-dive-limit=#
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.
--event-scheduler[=name]
Enable the event scheduler. Possible values are ON, OFF,
and DISABLED (keep the event scheduler completely
deactivated, it cannot be activated run-time)
-T, --exit-info[=#] Used for debugging. Use at your own risk.
--expire-logs-days=#
If non-zero, binary logs will be purged after
expire_logs_days days; possible purges happen at startup
and at binary log rotation
--explicit-defaults-for-timestamp
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. The old behavior is deprecated.
--external-locking Use system (external) locking (disabled by default).
With this option enabled you can run myisamchk to test
(not repair) tables while the MySQL server is running.
Disable with --skip-external-locking.
--federated[=name] Enable or disable FEDERATED plugin. Possible values are
ON, OFF, FORCE (don‘t start if the plugin fails to load).
--flush Flush MyISAM tables to disk between SQL commands
--flush-time=# A dedicated thread is created to flush all tables at the
given interval
--ft-boolean-syntax=name
List of operators for MATCH ... AGAINST ( ... IN BOOLEAN
MODE)
--ft-max-word-len=# The maximum length of the word to be included in a
FULLTEXT index. Note: FULLTEXT indexes must be rebuilt
after changing this variable
--ft-min-word-len=# The minimum length of the word to be included in a
FULLTEXT index. Note: FULLTEXT indexes must be rebuilt
after changing this variable
--ft-query-expansion-limit=#
Number of best matches to use for query expansion
--ft-stopword-file=name
Use stopwords from this file instead of built-in list
--gdb Set up signals usable for debugging.
--general-log 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
--general-log-file=name
Log connections and queries to given file
--group-concat-max-len=#
The maximum length of the result of function
GROUP_CONCAT()
--gtid-mode=name Whether Global Transaction Identifiers (GTIDs) are
enabled. Can be ON or OFF.
-?, --help Display this help and exit.
--host-cache-size=# How many host names should be cached to avoid resolving.
--ignore-builtin-innodb
IGNORED. This option will be removed in future releases.
Disable initialization of builtin InnoDB plugin
--ignore-db-dir=name
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.
--init-connect=name Command(s) that are executed for each new connection
--init-file=name Read SQL commands from this file at startup
--init-slave=name Command(s) that are executed by a slave server each time
the SQL thread starts
--innodb[=name] Enable or disable InnoDB plugin. Possible values are ON,
OFF, FORCE (don‘t start if the plugin fails to load).
--innodb-adaptive-flushing
Attempt flushing dirty pages to avoid IO bursts at
checkpoints.
(Defaults to on; use --skip-innodb-adaptive-flushing to disable.)
--innodb-adaptive-flushing-lwm=#
Percentage of log capacity below which no adaptive
flushing happens.
--innodb-adaptive-hash-index
Enable InnoDB adaptive hash index (enabled by default).
Disable with --skip-innodb-adaptive-hash-index.
(Defaults to on; use --skip-innodb-adaptive-hash-index to disable.)
--innodb-adaptive-max-sleep-delay=#
The upper limit of the sleep delay in usec. Value of 0
disables it.
--innodb-additional-mem-pool-size=#
DEPRECATED. This option may be removed in future
releases, together with the option innodb_use_sys_malloc
and with the InnoDB‘s internal memory allocator. Size of
a memory pool InnoDB uses to store data dictionary
information and other internal data structures.
--innodb-api-bk-commit-interval[=#]
Background commit interval in seconds
--innodb-api-disable-rowlock
Disable row lock when direct access InnoDB through InnoDB
APIs
--innodb-api-enable-binlog
Enable binlog for applications direct access InnoDB
through InnoDB APIs
--innodb-api-enable-mdl
Enable MDL for applications direct access InnoDB through
InnoDB APIs
--innodb-api-trx-level[=#]
InnoDB API transaction isolation level
--innodb-autoextend-increment=#
Data file autoextend increment in megabytes
--innodb-autoinc-lock-mode=#
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)
--innodb-buffer-page[=name]
Enable or disable INNODB_BUFFER_PAGE plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-buffer-page-lru[=name]
Enable or disable INNODB_BUFFER_PAGE_LRU plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-buffer-pool-dump-at-shutdown
Dump the buffer pool into a file named
@@innodb_buffer_pool_filename
--innodb-buffer-pool-dump-now
Trigger an immediate dump of the buffer pool into a file
named @@innodb_buffer_pool_filename
--innodb-buffer-pool-filename=name
Filename to/from which to dump/load the InnoDB buffer
pool
--innodb-buffer-pool-instances=#
Number of buffer pool instances, set to higher value on
high-end machines to increase scalability
--innodb-buffer-pool-load-abort
Abort a currently running load of the buffer pool
--innodb-buffer-pool-load-at-startup
Load the buffer pool from a file named
@@innodb_buffer_pool_filename
--innodb-buffer-pool-load-now
Trigger an immediate load of the buffer pool from a file
named @@innodb_buffer_pool_filename
--innodb-buffer-pool-size=#
The size of the memory buffer InnoDB uses to cache data
and indexes of its tables.
--innodb-buffer-pool-stats[=name]
Enable or disable INNODB_BUFFER_POOL_STATS plugin.
Possible values are ON, OFF, FORCE (don‘t start if the
plugin fails to load).
--innodb-change-buffer-max-size=#
Maximum on-disk size of change buffer in terms of
percentage of the buffer pool.
--innodb-change-buffering=name
Buffer changes to reduce random access: OFF, ON,
inserting, deleting, changing, or purging.
--innodb-checksum-algorithm=name
The algorithm InnoDB uses for page checksumming. Possible
values are CRC32 (hardware accelerated if the CPU
supports it) write crc32, allow any of the other
checksums to match when reading; STRICT_CRC32 write
crc32, do not allow other algorithms to match when
reading; INNODB write a software calculated checksum,
allow any other checksums to match when reading;
STRICT_INNODB write a software calculated checksum, do
not allow other algorithms to match when reading; NONE
write a constant magic number, do not do any checksum
verification when reading (same as innodb_checksums=OFF);
STRICT_NONE write a constant magic number, do not allow
values other than that magic number when reading; Files
updated when this option is set to crc32 or strict_crc32
will not be readable by MySQL versions older than 5.6.3
--innodb-checksums DEPRECATED. Use innodb_checksum_algorithm=NONE instead of
setting this to OFF. Enable InnoDB checksums validation
(enabled by default). Disable with
--skip-innodb-checksums.
(Defaults to on; use --skip-innodb-checksums to disable.)
--innodb-cmp[=name] Enable or disable INNODB_CMP plugin. Possible values are
ON, OFF, FORCE (don‘t start if the plugin fails to load).
--innodb-cmp-per-index[=name]
Enable or disable INNODB_CMP_PER_INDEX plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-cmp-per-index-enabled
Enable INFORMATION_SCHEMA.innodb_cmp_per_index, may have
negative impact on performance (off by default)
--innodb-cmp-per-index-reset[=name]
Enable or disable INNODB_CMP_PER_INDEX_RESET plugin.
Possible values are ON, OFF, FORCE (don‘t start if the
plugin fails to load).
--innodb-cmp-reset[=name]
Enable or disable INNODB_CMP_RESET plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-cmpmem[=name]
Enable or disable INNODB_CMPMEM plugin. Possible values
are ON, OFF, FORCE (don‘t start if the plugin fails to
load).
--innodb-cmpmem-reset[=name]
Enable or disable INNODB_CMPMEM_RESET plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-commit-concurrency=#
Helps in performance tuning in heavily concurrent
environments.
--innodb-compression-failure-threshold-pct[=#]
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
--innodb-compression-level=#
Compression level used for compressed row format. 0 is
no compression, 1 is fastest, 9 is best compression and
default is 6.
--innodb-compression-pad-pct-max[=#]
Percentage of empty space on a data page that can be
reserved to make the page compressible.
--innodb-concurrency-tickets=#
Number of times a thread is allowed to enter InnoDB
within the same SQL query after it has once got the
ticket
--innodb-data-file-path=name
Path to individual files and their sizes.
--innodb-data-home-dir=name
The common part for InnoDB table spaces.
--innodb-disable-sort-file-cache
Whether to disable OS system file cache for sort I/O
--innodb-doublewrite
Enable InnoDB doublewrite buffer (enabled by default).
Disable with --skip-innodb-doublewrite.
(Defaults to on; use --skip-innodb-doublewrite to disable.)
--innodb-fast-shutdown[=#]
Speeds up the shutdown process of the InnoDB storage
engine. Possible values are 0, 1 (faster) or 2 (fastest -
crash-like).
--innodb-file-format=name
File format to use for new tables in .ibd files.
--innodb-file-format-check
Whether to perform system file format check.
(Defaults to on; use --skip-innodb-file-format-check to disable.)
--innodb-file-format-max[=name]
The highest file format in the tablespace.
--innodb-file-io-threads=#
Number of file I/O threads in InnoDB.
--innodb-file-per-table
Stores each InnoDB table to an .ibd file in the database
dir.
(Defaults to on; use --skip-innodb-file-per-table to disable.)
--innodb-flush-log-at-timeout[=#]
Write and flush logs every (n) second.
--innodb-flush-log-at-trx-commit[=#]
Set to 0 (write and flush once per second), 1 (write and
flush at each commit) or 2 (write at commit, flush once
per second).
--innodb-flush-method=name
With which method to flush data.
--innodb-flush-neighbors[=#]
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
--innodb-flushing-avg-loops=#
Number of iterations over which the background flushing
is averaged.
--innodb-force-load-corrupted
Force InnoDB to load metadata of corrupted table.
--innodb-force-recovery=#
Helps to save your data in case the disk image of the
database becomes corrupt.
--innodb-ft-aux-table
FTS internal auxiliary table to be checked
--innodb-ft-being-deleted[=name]
Enable or disable INNODB_FT_BEING_DELETED plugin.
Possible values are ON, OFF, FORCE (don‘t start if the
plugin fails to load).
--innodb-ft-cache-size=#
InnoDB Fulltext search cache size in bytes
--innodb-ft-config[=name]
Enable or disable INNODB_FT_CONFIG plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-ft-default-stopword[=name]
Enable or disable INNODB_FT_DEFAULT_STOPWORD plugin.
Possible values are ON, OFF, FORCE (don‘t start if the
plugin fails to load).
--innodb-ft-deleted[=name]
Enable or disable INNODB_FT_DELETED plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-ft-enable-diag-print
Whether to enable additional FTS diagnostic printout
--innodb-ft-enable-stopword
Create FTS index with stopword.
(Defaults to on; use --skip-innodb-ft-enable-stopword to disable.)
--innodb-ft-index-cache[=name]
Enable or disable INNODB_FT_INDEX_CACHE plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-ft-index-table[=name]
Enable or disable INNODB_FT_INDEX_TABLE plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-ft-max-token-size=#
InnoDB Fulltext search maximum token size in characters
--innodb-ft-min-token-size=#
InnoDB Fulltext search minimum token size in characters
--innodb-ft-num-word-optimize[=#]
InnoDB Fulltext search number of words to optimize for
each optimize table call
--innodb-ft-server-stopword-table[=name]
The user supplied stopword table name.
--innodb-ft-sort-pll-degree=#
InnoDB Fulltext search parallel sort degree, will round
up to nearest power of 2 number
--innodb-ft-user-stopword-table[=name]
User supplied stopword table name, effective in the
session level.
--innodb-io-capacity=#
Number of IOPs the server can do. Tunes the background IO
rate
--innodb-io-capacity-max=#
Limit to which innodb_io_capacity can be inflated.
--innodb-large-prefix
Support large index prefix length of
REC_VERSION_56_MAX_INDEX_COL_LEN (3072) bytes.
--innodb-lock-wait-timeout=#
Timeout in seconds an InnoDB transaction may wait for a
lock before being rolled back. Values above 100000000
disable the timeout.
--innodb-lock-waits[=name]
Enable or disable INNODB_LOCK_WAITS plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-locks[=name]
Enable or disable INNODB_LOCKS plugin. Possible values
are ON, OFF, FORCE (don‘t start if the plugin fails to
load).
--innodb-locks-unsafe-for-binlog
DEPRECATED. This option may be removed in future
releases. Please use READ COMMITTED transaction isolation
level instead. Force InnoDB to not use next-key locking,
to use only row-level locking.
--innodb-log-buffer-size=#
The size of the buffer which InnoDB uses to write log to
the log files on disk.
--innodb-log-compressed-pages
Enables/disables the logging of entire compressed page
images. InnoDB logs the compressed pages to prevent
corruption if the zlib compression algorithm changes.
When turned OFF, InnoDB will assume that the zlib
compression algorithm doesn‘t change.
(Defaults to on; use --skip-innodb-log-compressed-pages to disable.)
--innodb-log-file-size=#
Size of each log file in a log group.
--innodb-log-files-in-group=#
Number of log files in the log group. InnoDB writes to
the files in a circular fashion.
--innodb-log-group-home-dir=name
Path to InnoDB log files.
--innodb-lru-scan-depth=#
How deep to scan LRU to keep it clean
--innodb-max-dirty-pages-pct=#
Percentage of dirty pages allowed in bufferpool.
--innodb-max-dirty-pages-pct-lwm=#
Percentage of dirty pages at which flushing kicks in.
--innodb-max-purge-lag=#
Desired maximum length of the purge queue (0 = no limit)
--innodb-max-purge-lag-delay=#
Maximum delay of user threads in micro-seconds
--innodb-metrics[=name]
Enable or disable INNODB_METRICS plugin. Possible values
are ON, OFF, FORCE (don‘t start if the plugin fails to
load).
--innodb-mirrored-log-groups=#
Number of identical copies of log groups we keep for the
database. Currently this should be set to 1.
--innodb-monitor-disable=name
Turn off a monitor counter
--innodb-monitor-enable=name
Turn on a monitor counter
--innodb-monitor-reset=name
Reset a monitor counter
--innodb-monitor-reset-all=name
Reset all values for a monitor counter
--innodb-old-blocks-pct=#
Percentage of the buffer pool to reserve for ‘old‘
blocks.
--innodb-old-blocks-time=#
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.
--innodb-online-alter-log-max-size=#
Maximum modification log file size for online index
creation
--innodb-open-files=#
How many files at the maximum InnoDB keeps open at the
same time.
--innodb-optimize-fulltext-only
Only optimize the Fulltext index of the table
--innodb-page-size[=#]
Page size to use for all InnoDB tablespaces.
--innodb-print-all-deadlocks
Print all deadlocks to MySQL error log (off by default)
--innodb-purge-batch-size[=#]
Number of UNDO log pages to purge in one batch from the
history list.
--innodb-purge-threads[=#]
Purge threads can be from 1 to 32. Default is 1.
--innodb-random-read-ahead
Whether to use read ahead for random access within an
extent.
--innodb-read-ahead-threshold=#
Number of pages that must be accessed sequentially for
InnoDB to trigger a readahead.
--innodb-read-io-threads=#
Number of background read I/O threads in InnoDB.
--innodb-read-only Start InnoDB in read only mode (off by default)
--innodb-replication-delay=#
Replication thread delay (ms) on the slave server if
innodb_thread_concurrency is reached (0 by default)
--innodb-rollback-on-timeout
Roll back the complete transaction on lock wait timeout,
for 4.x compatibility (disabled by default)
--innodb-rollback-segments[=#]
Number of undo logs to use (deprecated).
--innodb-sort-buffer-size=#
Memory buffer size for index creation
--innodb-spin-wait-delay[=#]
Maximum delay between polling for a spin lock (6 by
default)
--innodb-stats-auto-recalc
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)
(Defaults to on; use --skip-innodb-stats-auto-recalc to disable.)
--innodb-stats-method=name
Specifies how InnoDB index statistics collection code
should treat NULLs. Possible values are NULLS_EQUAL
(default), NULLS_UNEQUAL and NULLS_IGNORED
--innodb-stats-on-metadata
Enable statistics gathering for metadata commands such as
SHOW TABLE STATUS for tables that use transient
statistics (off by default)
--innodb-stats-persistent
InnoDB persistent statistics enabled for all tables
unless overridden at table level
(Defaults to on; use --skip-innodb-stats-persistent to disable.)
--innodb-stats-persistent-sample-pages=#
The number of leaf index pages to sample when calculating
persistent statistics (by ANALYZE, default 20)
--innodb-stats-sample-pages=#
Deprecated, use innodb_stats_transient_sample_pages
instead
--innodb-stats-transient-sample-pages=#
The number of leaf index pages to sample when calculating
transient statistics (if persistent statistics are not
used, default 8)
--innodb-status-file
Enable SHOW ENGINE INNODB STATUS output in the
innodb_status.<pid> file
--innodb-strict-mode
Use strict mode when evaluating create options.
--innodb-support-xa Enable InnoDB support for the XA two-phase commit
(Defaults to on; use --skip-innodb-support-xa to disable.)
--innodb-sync-array-size[=#]
Size of the mutex/lock wait array.
--innodb-sync-spin-loops=#
Count of spin-loop rounds in InnoDB mutexes (30 by
default)
--innodb-sys-columns[=name]
Enable or disable INNODB_SYS_COLUMNS plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-sys-datafiles[=name]
Enable or disable INNODB_SYS_DATAFILES plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-sys-fields[=name]
Enable or disable INNODB_SYS_FIELDS plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-sys-foreign[=name]
Enable or disable INNODB_SYS_FOREIGN plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-sys-foreign-cols[=name]
Enable or disable INNODB_SYS_FOREIGN_COLS plugin.
Possible values are ON, OFF, FORCE (don‘t start if the
plugin fails to load).
--innodb-sys-indexes[=name]
Enable or disable INNODB_SYS_INDEXES plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-sys-tables[=name]
Enable or disable INNODB_SYS_TABLES plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-sys-tablespaces[=name]
Enable or disable INNODB_SYS_TABLESPACES plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-sys-tablestats[=name]
Enable or disable INNODB_SYS_TABLESTATS plugin. Possible
values are ON, OFF, FORCE (don‘t start if the plugin
fails to load).
--innodb-table-locks
Enable InnoDB locking in LOCK TABLES
(Defaults to on; use --skip-innodb-table-locks to disable.)
--innodb-thread-concurrency=#
Helps in performance tuning in heavily concurrent
environments. Sets the maximum number of threads allowed
inside InnoDB. Value 0 will disable the thread
throttling.
--innodb-thread-sleep-delay=#
Time of innodb thread sleeping before joining InnoDB
queue (usec). Value 0 disable a sleep
--innodb-trx[=name] Enable or disable INNODB_TRX plugin. Possible values are
ON, OFF, FORCE (don‘t start if the plugin fails to load).
--innodb-undo-directory=name
Directory where undo tablespace files live, this path can
be absolute.
--innodb-undo-logs[=#]
Number of undo logs to use.
--innodb-undo-tablespaces=#
Number of undo tablespaces to use.
--innodb-use-native-aio
Use native AIO if supported on this platform.
(Defaults to on; use --skip-innodb-use-native-aio to disable.)
--innodb-use-sys-malloc
DEPRECATED. This option may be removed in future
releases, together with the InnoDB‘s internal memory
allocator. Use OS memory allocator instead of InnoDB‘s
internal memory allocator
(Defaults to on; use --skip-innodb-use-sys-malloc to disable.)
--innodb-write-io-threads=#
Number of background write I/O threads in InnoDB.
--interactive-timeout=#
The number of seconds the server waits for activity on an
interactive connection before closing it
--join-buffer-size=#
The size of the buffer that is used for full joins
--keep-files-on-create
Don‘t overwrite stale .MYD and .MYI even if no directory
is specified
--key-buffer-size=# 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
--key-cache-age-threshold=#
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
--key-cache-block-size=#
The default size of key cache blocks
--key-cache-division-limit=#
The minimum percentage of warm blocks in key cache
-L, --language=name Client error messages in given language. May be given as
a full path. Deprecated. Use --lc-messages-dir instead.
--large-pages Enable support for large pages
--lc-messages=name Set the language used for the error messages.
--lc-messages-dir=name
Directory where error messages are
--lc-time-names=name
Set the language used for the month names and the days of
the week.
--local-infile Enable LOAD DATA LOCAL INFILE
(Defaults to on; use --skip-local-infile to disable.)
--lock-wait-timeout=#
Timeout in seconds to wait for a lock before returning an
error.
--log-bin[=name] Log update queries in binary format. Optional (but
strongly recommended to avoid replication problems if
server‘s hostname changes) argument should be the chosen
location for the binary log files.
--log-bin-index=name
File that holds the names for binary log files.
--log-bin-trust-function-creators
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
--log-bin-use-v1-row-events
If equal to 1 then version 1 row events are written to a
row based binary log. If equal to 0, then the latest
version of events are written. This option is useful
during some upgrades.
--log-error[=name] Error log file
--log-isam[=name] Log all MyISAM changes to file.
--log-output=name Syntax: log-output=value[,value...], where "value" could
be TABLE, FILE or NONE
--log-queries-not-using-indexes
Log queries that are executed without benefit of any
index to the slow log if it is open
--log-raw Log to general log before any rewriting of the query. For
use in debugging, not production as sensitive information
may be logged.
--log-short-format Don‘t log extra information to update and slow-query
logs.
--log-slave-updates Tells the slave to log the updates from the slave thread
to the binary log. You will need to turn it on if you
plan to daisy-chain the slaves
--log-slow-admin-statements
Log slow OPTIMIZE, ANALYZE, ALTER and other
administrative statements to the slow log if it is open.
--log-slow-slave-statements
Log slow statements executed by slave thread to the slow
log if it is open.
--log-tc=name Path to transaction coordinator log (used for
transactions that affect more than one storage engine,
when binary log is disabled).
--log-tc-size=# Size of transaction coordinator log.
--log-throttle-queries-not-using-indexes[=#]
Log at most this many ‘not using index‘ warnings per
minute to the slow log. Any further warnings will be
condensed into a single summary line. A value of 0
disables throttling. Option has no effect unless
--log_queries_not_using_indexes is set.
mysql5.6配置文件详解（一）