· 9 years ago · Jun 24, 2017, 09:22 AM
1Usage: ./bin/mysqld [OPTIONS]
2
3Default options are read from the following files in the given order:
4/etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf
5The following groups are read: mysqld server mysqld-5.1
6The following options may be given as the first argument:
7--print-defaults Print the program argument list and exit.
8--no-defaults Don't read default options from any option file.
9--defaults-file=# Only read default options from the given file #.
10--defaults-extra-file=# Read this file after the global files are read.
11
12 --abort-slave-event-count=#
13 Option used by mysql-test for debugging and testing of
14 replication.
15 --allow-suspicious-udfs
16 Allows use of UDFs consisting of only one symbol xxx()
17 without corresponding xxx_init() or xxx_deinit(). That
18 also means that one can load any function from any
19 library, for example exit() from libc.so
20 -a, --ansi Use ANSI SQL syntax instead of MySQL syntax. This mode
21 will also set transaction isolation level 'serializable'.
22 --auto-increment-increment[=#]
23 Auto-increment columns are incremented by this.
24 --auto-increment-offset[=#]
25 Offset added to Auto-increment columns. Used when
26 auto-increment-increment != 1.
27 --automatic-sp-privileges
28 Creating and dropping stored procedures alters ACLs.
29 Disable with --skip-automatic-sp-privileges.
30 --back_log=# The number of outstanding connection requests MySQL can
31 have. This comes into play when the main MySQL thread
32 gets very many connection requests in a very short time.
33 -b, --basedir=name Path to installation directory. All paths are usually
34 resolved relative to this.
35 --big-tables Allow big result sets by saving all temporary sets on
36 file (solves most 'table full' errors).
37 --bind-address=name IP address to bind to.
38 --binlog-direct-non-transactional-updates
39 Causes updates to non-transactional engines using
40 statement format to be written directly to binary log.
41 Before using this option, make sure that there are no
42 dependencies between transactional and non-transactional
43 tables such as in the statement INSERT INTO t_myisam
44 SELECT * FROM t_innodb; otherwise, slaves may diverge
45 from the master.
46 --binlog-do-db=name Tells the master it should log updates for the specified
47 database, and exclude all others not explicitly
48 mentioned.
49 --binlog-ignore-db=name
50 Tells the master that updates to the given database
51 should not be logged to the binary log.
52 --binlog-row-event-max-size=#
53 The maximum size of a row-based binary log event in
54 bytes. Rows will be grouped into events smaller than this
55 size if possible. The value has to be a multiple of 256.
56 --binlog_cache_size=#
57 The size of the cache to hold the SQL statements for the
58 binary log during a transaction. If you often use big,
59 multi-statement transactions you can increase this to get
60 more performance.
61 --binlog_format=name
62 Does not have any effect without '--log-bin'. Tell the
63 master the form of binary logging to use: either 'row'
64 for row-based binary logging, 'statement' for
65 statement-based binary logging, or 'mixed'. 'mixed' is
66 statement-based binary logging except for statements
67 where only row-based is correct: Statements that involve
68 user-defined functions (i.e., UDFs) or the UUID()
69 function.
70 --bootstrap Used by mysql installation scripts.
71 --bulk_insert_buffer_size=#
72 Size of tree cache used in bulk insert optimization. Note
73 that this is a limit per thread.
74 --character-set-client-handshake
75 Don't ignore client side character set value sent during
76 handshake.
77 --character-set-filesystem=name
78 Set the filesystem character set.
79 -C, --character-set-server=name
80 Set the default character set.
81 --character-sets-dir=name
82 Directory where character sets are.
83 -r, --chroot=name Chroot mysqld daemon during startup.
84 --collation-server=name
85 Set the default collation.
86 --completion-type=# Default completion type.
87 --concurrent-insert[=#]
88 Use concurrent insert with MyISAM. Disable with
89 --concurrent-insert=0.
90 --connect_timeout=# The number of seconds the mysqld server is waiting for a
91 connect packet before responding with 'Bad handshake'.
92 --console Write error output on screen; don't remove the console
93 window on windows.
94 --core-file Write core on errors.
95 -h, --datadir=name Path to the database root.
96 --datetime_format=name
97 The DATETIME/TIMESTAMP format (for future).
98 --date_format=name The DATE format (for future).
99 --default-character-set=name
100 Set the default character set (deprecated option, use
101 --character-set-server instead).
102 --default-collation=name
103 Set the default collation (deprecated option, use
104 --collation-server instead).
105 --default-storage-engine=name
106 Set the default storage engine (table type) for tables.
107 --default-table-type=name
108 (deprecated) Use --default-storage-engine.
109 --default-time-zone=name
110 Set the default time zone.
111 --default_week_format=#
112 The default week format used by WEEK() functions.
113 --delay-key-write[=name]
114 Type of DELAY_KEY_WRITE.
115 --delay-key-write-for-all-tables
116 Don't flush key buffers between writes for any MyISAM
117 table. (Deprecated option, use --delay-key-write=all
118 instead.)
119 --delayed_insert_limit=#
120 After inserting delayed_insert_limit rows, the INSERT
121 DELAYED handler will check if there are any SELECT
122 statements pending. If so, it allows these to execute
123 before continuing.
124 --delayed_insert_timeout=#
125 How long a INSERT DELAYED thread should wait for INSERT
126 statements before terminating.
127 --delayed_queue_size=#
128 What size queue (in rows) should be allocated for
129 handling INSERT DELAYED. If the queue becomes full, any
130 client that does INSERT DELAYED will wait until there is
131 room in the queue again.
132 --des-key-file=name Load keys for des_encrypt() and des_encrypt from given
133 file.
134 --disconnect-slave-event-count=#
135 Option used by mysql-test for debugging and testing of
136 replication.
137 --div_precision_increment=#
138 Precision of the result of '/' operator will be increased
139 on that value.
140 --enable-locking Deprecated option, use --external-locking instead.
141 --engine-condition-pushdown
142 Push supported query conditions to the storage engine.
143 --event-scheduler[=name]
144 Enable/disable the event scheduler.
145 -T, --exit-info[=#] Used for debugging. Use at your own risk.
146 --expire_logs_days=#
147 If non-zero, binary logs will be purged after
148 expire_logs_days days; possible purges happen at startup
149 and at binary log rotation.
150 --external-locking Use system (external) locking (disabled by default).
151 With this option enabled you can run myisamchk to test
152 (not repair) tables while the MySQL server is running.
153 Disable with --skip-external-locking.
154 --flush Flush tables to disk between SQL commands.
155 --flush_time=# A dedicated thread is created to flush all tables at the
156 given interval.
157 --ft_boolean_syntax=name
158 List of operators for MATCH ... AGAINST ( ... IN BOOLEAN
159 MODE).
160 --ft_max_word_len=# The maximum length of the word to be included in a
161 FULLTEXT index. Note: FULLTEXT indexes must be rebuilt
162 after changing this variable.
163 --ft_min_word_len=# The minimum length of the word to be included in a
164 FULLTEXT index. Note: FULLTEXT indexes must be rebuilt
165 after changing this variable.
166 --ft_query_expansion_limit=#
167 Number of best matches to use for query expansion.
168 --ft_stopword_file=name
169 Use stopwords from this file instead of built-in list.
170 --gdb Set up signals usable for debugging.
171 --general_log Enable/disable general log.
172 --general_log_file=name
173 Log connections and queries to given file.
174 --group_concat_max_len=#
175 The maximum length of the result of function
176 group_concat.
177 -?, --help Display this help and exit.
178 --ignore-builtin-innodb
179 Disable initialization of builtin InnoDB plugin.
180 --init-connect=name Command(s) that are executed for each new connection.
181 --init-file=name Read SQL commands from this file at startup.
182 --init-rpl-role=name
183 Set the replication role.
184 --init-slave=name Command(s) that are executed by a slave server each time
185 the SQL thread starts.
186 --innodb[=#] Enable or disable InnoDB plugin. Possible values are ON,
187 OFF, FORCE (don't start if the plugin fails to load).
188 --innodb-adaptive-hash-index
189 Enable InnoDB adaptive hash index (enabled by default).
190 Disable with --skip-innodb-adaptive-hash-index.
191 --innodb-additional-mem-pool-size=#
192 Size of a memory pool InnoDB uses to store data
193 dictionary information and other internal data
194 structures.
195 --innodb-autoextend-increment=#
196 Data file autoextend increment in megabytes
197 --innodb-autoinc-lock-mode=#
198 The AUTOINC lock modes supported by InnoDB:
199 0 => Old style AUTOINC locking (for backward
200 compatibility)
201 1 => New style AUTOINC locking
202 2 => No AUTOINC locking (unsafe for SBR)
203 --innodb-buffer-pool-size=#
204 The size of the memory buffer InnoDB uses to cache data
205 and indexes of its tables.
206 --innodb-checksums Enable InnoDB checksums validation (enabled by default).
207 Disable with --skip-innodb-checksums.
208 --innodb-commit-concurrency=#
209 Helps in performance tuning in heavily concurrent
210 environments.
211 --innodb-concurrency-tickets=#
212 Number of times a thread is allowed to enter InnoDB
213 within the same SQL query after it has once got the
214 ticket
215 --innodb-data-file-path=name
216 Path to individual files and their sizes.
217 --innodb-data-home-dir=name
218 The common part for InnoDB table spaces.
219 --innodb-doublewrite
220 Enable InnoDB doublewrite buffer (enabled by default).
221 Disable with --skip-innodb-doublewrite.
222 --innodb-fast-shutdown[=#]
223 Speeds up the shutdown process of the InnoDB storage
224 engine. Possible values are 0, 1 (faster) or 2 (fastest -
225 crash-like).
226 --innodb-file-io-threads=#
227 Number of file I/O threads in InnoDB.
228 --innodb-file-per-table
229 Stores each InnoDB table to an .ibd file in the database
230 dir.
231 --innodb-flush-log-at-trx-commit[=#]
232 Set to 0 (write and flush once per second), 1 (write and
233 flush at each commit) or 2 (write at commit, flush once
234 per second).
235 --innodb-flush-method=name
236 With which method to flush data.
237 --innodb-force-recovery=#
238 Helps to save your data in case the disk image of the
239 database becomes corrupt.
240 --innodb-lock-wait-timeout=#
241 Timeout in seconds an InnoDB transaction may wait for a
242 lock before being rolled back.
243 --innodb-locks-unsafe-for-binlog
244 Force InnoDB to not use next-key locking, to use only
245 row-level locking.
246 --innodb-log-buffer-size=#
247 The size of the buffer which InnoDB uses to write log to
248 the log files on disk.
249 --innodb-log-file-size=#
250 Size of each log file in a log group.
251 --innodb-log-files-in-group=#
252 Number of log files in the log group. InnoDB writes to
253 the files in a circular fashion. Value 3 is recommended
254 here.
255 --innodb-log-group-home-dir=name
256 Path to InnoDB log files.
257 --innodb-max-dirty-pages-pct=#
258 Percentage of dirty pages allowed in bufferpool.
259 --innodb-max-purge-lag=#
260 Desired maximum length of the purge queue (0 = no limit)
261 --innodb-mirrored-log-groups=#
262 Number of identical copies of log groups we keep for the
263 database. Currently this should be set to 1.
264 --innodb-open-files=#
265 How many files at the maximum InnoDB keeps open at the
266 same time.
267 --innodb-rollback-on-timeout
268 Roll back the complete transaction on lock wait timeout,
269 for 4.x compatibility (disabled by default)
270 --innodb-stats-on-metadata
271 Enable statistics gathering for metadata commands such as
272 SHOW TABLE STATUS (on by default)
273 --innodb-status-file
274 Enable SHOW INNODB STATUS output in the
275 innodb_status.<pid> file
276 --innodb-support-xa Enable InnoDB support for the XA two-phase commit
277 --innodb-sync-spin-loops=#
278 Count of spin-loop rounds in InnoDB mutexes
279 --innodb-table-locks
280 Enable InnoDB locking in LOCK TABLES
281 --innodb-thread-concurrency=#
282 Helps in performance tuning in heavily concurrent
283 environments. Sets the maximum number of threads allowed
284 inside InnoDB. Value 0 will disable the thread
285 throttling.
286 --innodb-thread-sleep-delay=#
287 Time of innodb thread sleeping before joining InnoDB
288 queue (usec). Value 0 disable a sleep
289 --innodb-use-legacy-cardinality-algorithm
290 Use legacy algorithm for picking random pages during
291 index cardinality estimation. Disable this to use a
292 better algorithm, but note that your query plans may
293 change (enabled by default).
294 --interactive_timeout=#
295 The number of seconds the server waits for activity on an
296 interactive connection before closing it.
297 --join_buffer_size=#
298 The size of the buffer that is used for full joins.
299 --keep_files_on_create
300 Don't overwrite stale .MYD and .MYI even if no directory
301 is specified.
302 --key_buffer_size=# The size of the buffer used for index blocks for MyISAM
303 tables. Increase this to get better index handling (for
304 all reads and multiple writes) to as much as you can
305 afford; 1GB on a 4GB machine that mainly runs MySQL is
306 quite common.
307 --key_cache_age_threshold=#
308 This characterizes the number of hits a hot block has to
309 be untouched until it is considered aged enough to be
310 downgraded to a warm block. This specifies the percentage
311 ratio of that number of hits to the total number of
312 blocks in key cache.
313 --key_cache_block_size=#
314 The default size of key cache blocks.
315 --key_cache_division_limit=#
316 The minimum percentage of warm blocks in key cache.
317 -L, --language=name Client error messages in given language. May be given as
318 a full path.
319 --large-pages Enable support for large pages. Disable with
320 --skip-large-pages.
321 --lc-time-names=name
322 Set the language used for the month names and the days of
323 the week.
324 --local-infile Enable/disable LOAD DATA LOCAL INFILE (takes values 1 or
325 0).
326 -l, --log[=name] Log connections and queries to file (deprecated option,
327 use --general_log/--general_log_file instead).
328 --log-bin[=name] Log update queries in binary format. Optional (but
329 strongly recommended to avoid replication problems if
330 server's hostname changes) argument should be the chosen
331 location for the binary log files.
332 --log-bin-index=name
333 File that holds the names for last binary log files.
334 --log-bin-trust-function-creators
335 If equal to 0 (the default), then when --log-bin is used,
336 creation of a stored function (or trigger) is allowed
337 only to users having the SUPER privilege, and only if
338 this stored function (trigger) may not break binary
339 logging.Note that if ALL connections to this server
340 ALWAYS use row-based binary logging, the security issues
341 do not exist and the binary logging cannot break, so you
342 can safely set this to 1.
343 --log-bin-trust-routine-creators
344 (deprecated) Use log-bin-trust-function-creators.
345 --log-error[=name] Error log file.
346 --log-isam[=name] Log all MyISAM changes to file.
347 -0, --log-long-format
348 Log some extra information to update log. Please note
349 that this option is deprecated; see --log-short-format
350 option.
351 --log-output[=name] Syntax: log-output[=value[,value...]], where "value"
352 could be TABLE, FILE or NONE.
353 --log-queries-not-using-indexes
354 Log queries that are executed without benefit of any
355 index to the slow log if it is open.
356 --log-short-format Don't log extra information to update and slow-query
357 logs.
358 --log-slave-updates Tells the slave to log the updates from the slave thread
359 to the binary log. You will need to turn it on if you
360 plan to daisy-chain the slaves.
361 --log-slow-admin-statements
362 Log slow OPTIMIZE, ANALYZE, ALTER and other
363 administrative statements to the slow log if it is open.
364 --log-slow-slave-statements
365 Log slow statements executed by slave thread to the slow
366 log if it is open.
367 --log-tc=name Path to transaction coordinator log (used for
368 transactions that affect more than one storage engine,
369 when binary log is disabled).
370 --log-tc-size=# Size of transaction coordinator log.
371 --log-update[=name] The update log is deprecated since version 5.0, is
372 replaced by the binary log and this option just turns on
373 --log-bin instead.
374 -W, --log-warnings[=#]
375 Log some not critical warnings to the log file.
376 --log_slow_queries[=name]
377 Log slow queries to a table or log file. Defaults logging
378 to table mysql.slow_log or hostname-slow.log if
379 --log-output=file is used. Must be enabled to activate
380 other slow log options. (deprecated option, use
381 --slow_query_log/--slow_query_log_file instead)
382 --long_query_time=# Log all queries that have taken more than long_query_time
383 seconds to execute. The argument will be treated as a
384 decimal value with microsecond precision.
385 --low-priority-updates
386 INSERT/DELETE/UPDATE has lower priority than selects.
387 --lower_case_table_names[=#]
388 If set to 1, table names are stored in lowercase on disk
389 and table names will be case-insensitive. Should be set
390 to 2 if you are using a case-insensitive file system.
391 --master-connect-retry=#
392 The number of seconds the slave thread will sleep before
393 retrying to connect to the master, in case the master
394 goes down or the connection is lost.
395 --master-host=name Master hostname or IP address for replication. If not
396 set, the slave thread will not be started. Note that the
397 setting of master-host will be ignored if there exists a
398 valid master.info file.
399 --master-info-file=name
400 The location and name of the file that remembers the
401 master and where the I/O replication thread is in the
402 master's binlogs.
403 --master-password=name
404 The password the slave thread will authenticate with when
405 connecting to the master. If not set, an empty password
406 is assumed. The value in master.info will take precedence
407 if it can be read.
408 --master-port=# The port the master is listening on. If not set, the
409 compiled setting of MYSQL_PORT is assumed. If you have
410 not tinkered with configure options, this should be 3306.
411 The value in master.info will take precedence if it can
412 be read.
413 --master-retry-count=#
414 The number of tries the slave will make to connect to the
415 master before giving up.
416 --master-ssl Enable the slave to connect to the master using SSL.
417 --master-ssl-ca[=name]
418 Master SSL CA file. Only applies if you have enabled
419 master-ssl.
420 --master-ssl-capath[=name]
421 Master SSL CA path. Only applies if you have enabled
422 master-ssl.
423 --master-ssl-cert[=name]
424 Master SSL certificate file name. Only applies if you
425 have enabled master-ssl.
426 --master-ssl-cipher[=name]
427 Master SSL cipher. Only applies if you have enabled
428 master-ssl.
429 --master-ssl-key[=name]
430 Master SSL keyfile name. Only applies if you have enabled
431 master-ssl.
432 --master-user=name The username the slave thread will use for authentication
433 when connecting to the master. The user must have FILE
434 privilege. If the master user is not set, user test is
435 assumed. The value in master.info will take precedence if
436 it can be read.
437 --max-binlog-dump-events=#
438 Option used by mysql-test for debugging and testing of
439 replication.
440 --max_allowed_packet=#
441 The maximum packet length to send to or receive from
442 server.
443 --max_binlog_cache_size=#
444 Can be used to restrict the total size used to cache a
445 multi-transaction query.
446 --max_binlog_size=# Binary log will be rotated automatically when the size
447 exceeds this value. Will also apply to relay logs if
448 max_relay_log_size is 0. The minimum value for this
449 variable is 4096.
450 --max_connections=# The number of simultaneous clients allowed.
451 --max_connect_errors=#
452 If there is more than this number of interrupted
453 connections from a host this host will be blocked from
454 further connections.
455 --max_delayed_threads=#
456 Don't start more than this number of threads to handle
457 INSERT DELAYED statements. If set to zero, which means
458 INSERT DELAYED is not used.
459 --max_error_count=# Max number of errors/warnings to store for a statement.
460 --max_heap_table_size=#
461 Don't allow creation of heap tables bigger than this.
462 --max_join_size=# Joins that are probably going to read more than
463 max_join_size records return an error.
464 --max_length_for_sort_data=#
465 Max number of bytes in sorted records.
466 --max_prepared_stmt_count=#
467 Maximum number of prepared statements in the server.
468 --max_relay_log_size=#
469 If non-zero: relay log will be rotated automatically when
470 the size exceeds this value; if zero (the default): when
471 the size exceeds max_binlog_size. 0 excepted, the minimum
472 value for this variable is 4096.
473 --max_seeks_for_key=#
474 Limit assumed max number of seeks when looking up rows
475 based on a key.
476 --max_sort_length=# The number of bytes to use when sorting BLOB or TEXT
477 values (only the first max_sort_length bytes of each
478 value are used; the rest are ignored).
479 --max_sp_recursion_depth[=#]
480 Maximum stored procedure recursion depth. (discussed with
481 docs).
482 --max_tmp_tables=# Maximum number of temporary tables a client can keep open
483 at a time.
484 --max_user_connections=#
485 The maximum number of active connections for a single
486 user (0 = no limit).
487 --max_write_lock_count=#
488 After this many write locks, allow some read locks to run
489 in between.
490 --memlock Lock mysqld in memory.
491 --min_examined_row_limit=#
492 Don't log queries which examine less than
493 min_examined_row_limit rows to file.
494 --multi_range_count=#
495 Number of key ranges to request at once.
496 --myisam-recover[=name]
497 Syntax: myisam-recover[=option[,option...]], where option
498 can be DEFAULT, BACKUP, FORCE or QUICK.
499 --myisam_block_size=#
500 Block size to be used for MyISAM index pages.
501 --myisam_data_pointer_size=#
502 Default pointer size to be used for MyISAM tables.
503 --myisam_max_extra_sort_file_size=#
504 This is a deprecated option that does nothing anymore. It
505 will be removed in MySQL 5.6
506 --myisam_max_sort_file_size=#
507 Don't use the fast sort index method to created index if
508 the temporary file would get bigger than this.
509 --myisam_mmap_size=#
510 Can be used to restrict the total memory used for memory
511 mmaping of myisam files
512 --myisam_repair_threads=#
513 Specifies whether several threads should be used when
514 repairing MyISAM tables. For values > 1, one thread is
515 used per index. The value of 1 disables parallel repair.
516 --myisam_sort_buffer_size=#
517 The buffer that is allocated when sorting the index when
518 doing a REPAIR or when creating indexes with CREATE INDEX
519 or ALTER TABLE.
520 --myisam_stats_method=name
521 Specifies how MyISAM index statistics collection code
522 should threat NULLs. Possible values of name are
523 "nulls_unequal" (default behavior for 4.1/5.0),
524 "nulls_equal" (emulate 4.0 behavior), and
525 "nulls_ignored".
526 --myisam_use_mmap Use memory mapping for reading and writing MyISAM tables.
527 --ndb-use-copying-alter-table
528 Force ndbcluster to always copy tables at alter table
529 (should only be used if on-line alter table fails).
530 --net_buffer_length=#
531 Buffer length for TCP/IP and socket communication.
532 --net_read_timeout=#
533 Number of seconds to wait for more data from a connection
534 before aborting the read.
535 --net_retry_count=# If a read on a communication port is interrupted, retry
536 this many times before giving up.
537 --net_write_timeout=#
538 Number of seconds to wait for a block to be written to a
539 connection before aborting the write.
540 -n, --new Use very new, possibly 'unsafe', functions.
541 --old Use compatible behavior.
542 --old-alter-table Use old, non-optimized alter table.
543 --old-passwords Use old password encryption method (needed for 4.0 and
544 older clients).
545 --old-style-user-limits
546 Enable old-style user limits (before 5.0.3, user
547 resources were counted per each user+host vs. per
548 account).
549 --one-thread (Deprecated): Only use one thread (for debugging under
550 Linux). Use thread-handling=no-threads instead.
551 --open_files_limit=#
552 If this is not 0, then mysqld will use this value to
553 reserve file descriptors to use with setrlimit(). If this
554 value is 0 then mysqld will reserve max_connections*5 or
555 max_connections + table_cache*2 (whichever is larger)
556 number of files.
557 --optimizer_prune_level[=#]
558 Controls the heuristic(s) applied during query
559 optimization to prune less-promising partial plans from
560 the optimizer search space. Meaning: 0 - do not apply any
561 heuristic, thus perform exhaustive search; 1 - prune
562 plans based on number of retrieved rows.
563 --optimizer_search_depth[=#]
564 Maximum depth of search performed by the query optimizer.
565 Values larger than the number of relations in a query
566 result in better query plans, but take longer to compile
567 a query. Smaller values than the number of tables in a
568 relation result in faster optimization, but may produce
569 very bad query plans. If set to 0, the system will
570 automatically pick a reasonable value; if set to
571 MAX_TABLES+2, the optimizer will switch to the original
572 find_best (used for testing/comparison).
573 --optimizer_switch=name
574 optimizer_switch=option=val[,option=val...], where
575 option={index_merge, index_merge_union,
576 index_merge_sort_union, index_merge_intersection} and
577 val={on, off, default}.
578 --pid-file=name Pid file used by safe_mysqld.
579 --plugin-load=name Optional semicolon-separated list of plugins to load,
580 where each plugin is identified as name=library, where
581 name is the plugin name and library is the plugin library
582 in plugin_dir.
583 --plugin_dir=name Directory for plugins.
584 -P, --port=# Port number to use for connection or 0 for default to, in
585 order of preference, my.cnf, $MYSQL_TCP_PORT,
586 /etc/services, built-in default (3306).
587 --port-open-timeout=#
588 Maximum time in seconds to wait for the port to become
589 free. (Default: No wait).
590 --preload_buffer_size=#
591 The size of the buffer that is allocated when preloading
592 indexes.
593 --profiling_history_size=#
594 Limit of query profiling memory.
595 --query_alloc_block_size=#
596 Allocation block size for query parsing and execution.
597 --query_cache_limit=#
598 Don't cache results that are bigger than this.
599 --query_cache_min_res_unit=#
600 Minimal size of unit in which space for results is
601 allocated (last unit will be trimmed after writing all
602 result data).
603 --query_cache_size=#
604 The memory allocated to store results from old queries.
605 --query_cache_type=#
606 0 = OFF = Don't cache or retrieve results. 1 = ON = Cache
607 all results except SELECT SQL_NO_CACHE ... queries. 2 =
608 DEMAND = Cache only SELECT SQL_CACHE ... queries.
609 --query_cache_wlock_invalidate
610 Invalidate queries in query cache on LOCK for write.
611 --query_prealloc_size=#
612 Persistent buffer for query parsing and execution.
613 --range_alloc_block_size=#
614 Allocation block size for storing ranges during
615 optimization.
616 --read_buffer_size=#
617 Each thread that does a sequential scan allocates a
618 buffer of this size for each table it scans. If you do
619 many sequential scans, you may want to increase this
620 value.
621 --read_only Make all non-temporary tables read-only, with the
622 exception of replication (slave) threads and users with
623 the SUPER privilege.
624 --read_rnd_buffer_size=#
625 When reading rows in sorted order after a sort, the rows
626 are read through this buffer to avoid disk seeks. If not
627 set, then it's set to the value of record_buffer.
628 --record_buffer=# Alias for read_buffer_size. This variable is deprecated
629 and will be removed in a future release.
630 --relay-log=name The location and name to use for relay logs.
631 --relay-log-index=name
632 The location and name to use for the file that keeps a
633 list of the last relay logs.
634 --relay-log-info-file=name
635 The location and name of the file that remembers where
636 the SQL replication thread is in the relay logs.
637 --relay_log_purge 0 = do not purge relay logs. 1 = purge them as soon as
638 they are no more needed.
639 --relay_log_space_limit=#
640 Maximum space to use for all relay logs.
641 --replicate-do-db=name
642 Tells the slave thread to restrict replication to the
643 specified database. To specify more than one database,
644 use the directive multiple times, once for each database.
645 Note that this will only work if you do not use
646 cross-database queries such as UPDATE some_db.some_table
647 SET foo='bar' while having selected a different or no
648 database. If you need cross database updates to work,
649 make sure you have 3.23.28 or later, and use
650 replicate-wild-do-table=db_name.%.
651 --replicate-do-table=name
652 Tells the slave thread to restrict replication to the
653 specified table. To specify more than one table, use the
654 directive multiple times, once for each table. This will
655 work for cross-database updates, in contrast to
656 replicate-do-db.
657 --replicate-ignore-db=name
658 Tells the slave thread to not replicate to the specified
659 database. To specify more than one database to ignore,
660 use the directive multiple times, once for each database.
661 This option will not work if you use cross database
662 updates. If you need cross database updates to work, make
663 sure you have 3.23.28 or later, and use
664 replicate-wild-ignore-table=db_name.%.
665 --replicate-ignore-table=name
666 Tells the slave thread to not replicate to the specified
667 table. To specify more than one table to ignore, use the
668 directive multiple times, once for each table. This will
669 work for cross-database updates, in contrast to
670 replicate-ignore-db.
671 --replicate-rewrite-db=name
672 Updates to a database with a different name than the
673 original. Example:
674 replicate-rewrite-db=master_db_name->slave_db_name.
675 --replicate-same-server-id
676 In replication, if set to 1, do not skip events having
677 our server id. Default value is 0 (to break infinite
678 loops in circular replication). Can't be set to 1 if
679 --log-slave-updates is used.
680 --replicate-wild-do-table=name
681 Tells the slave thread to restrict replication to the
682 tables that match the specified wildcard pattern. To
683 specify more than one table, use the directive multiple
684 times, once for each table. This will work for
685 cross-database updates. Example:
686 replicate-wild-do-table=foo%.bar% will replicate only
687 updates to tables in all databases that start with foo
688 and whose table names start with bar.
689 --replicate-wild-ignore-table=name
690 Tells the slave thread to not replicate to the tables
691 that match the given wildcard pattern. To specify more
692 than one table to ignore, use the directive multiple
693 times, once for each table. This will work for
694 cross-database updates. Example:
695 replicate-wild-ignore-table=foo%.bar% will not do updates
696 to tables in databases that start with foo and whose
697 table names start with bar.
698 --report-host=name Hostname or IP of the slave to be reported to the master
699 during slave registration. Will appear in the output of
700 SHOW SLAVE HOSTS. Leave unset if you do not want the
701 slave to register itself with the master. Note that it is
702 not sufficient for the master to simply read the IP of
703 the slave from the socket once the slave connects. Due to
704 NAT and other routing issues, that IP may not be valid
705 for connecting to the slave from the master or other
706 hosts.
707 --report-password=name
708 Undocumented.
709 --report-port=# Port for connecting to slave reported to the master
710 during slave registration. Set it only if the slave is
711 listening on a non-default port or if you have a special
712 tunnel from the master or other clients to the slave. If
713 not sure, leave this option unset.
714 --report-user=name Undocumented.
715 --rpl-recovery-rank=#
716 Undocumented.
717 --safe-mode Skip some optimize stages (for testing).
718 --safe-show-database
719 Deprecated option; use GRANT SHOW DATABASES instead.
720 --safe-user-create Don't allow new user creation by the user who has no
721 write privileges to the mysql.user table.
722 --safemalloc-mem-limit=#
723 Simulate memory shortage when compiled with the
724 --with-debug=full option.
725 --secure-auth Disallow authentication for accounts that have old
726 (pre-4.1) passwords.
727 --secure-file-priv=name
728 Limit LOAD DATA, SELECT ... OUTFILE, and LOAD_FILE() to
729 files within specified directory.
730 --server-id=# Uniquely identifies the server instance in the community
731 of replication partners.
732 -O, --set-variable=name
733 Change the value of a variable. Please note that this
734 option is deprecated; you can set variables directly with
735 --variable-name=value.
736 --show-slave-auth-info
737 Show user and password in SHOW SLAVE HOSTS on this
738 master.
739 --skip-grant-tables Start without grant tables. This gives all users FULL
740 ACCESS to all tables.
741 --skip-host-cache Don't cache host names.
742 --skip-locking Deprecated option, use --skip-external-locking instead.
743 --skip-name-resolve Don't resolve hostnames. All hostnames are IP's or
744 'localhost'.
745 --skip-networking Don't allow connection with TCP/IP.
746 --skip-new Don't use new, possibly wrong routines.
747 --skip-show-database
748 Don't allow 'SHOW DATABASE' commands.
749 --skip-slave-start If set, slave is not autostarted.
750 --skip-stack-trace Don't print a stack trace on failure.
751 --skip-symlink Don't allow symlinking of tables. Deprecated option. Use
752 --skip-symbolic-links instead.
753 --skip-thread-priority
754 Don't give threads different priorities. Deprecated
755 option.
756 --slave-exec-mode=name
757 Modes for how replication events should be executed.
758 Legal values are STRICT (default) and IDEMPOTENT. In
759 IDEMPOTENT mode, replication will not stop for operations
760 that are idempotent. In STRICT mode, replication will
761 stop on any unexpected difference between the master and
762 the slave.
763 --slave-load-tmpdir=name
764 The location where the slave should put its temporary
765 files when replicating a LOAD DATA INFILE command.
766 --slave-skip-errors=name
767 Tells the slave thread to continue replication when a
768 query event returns an error from the provided list.
769 --slave_compressed_protocol
770 Use compression on master/slave protocol.
771 --slave_net_timeout=#
772 Number of seconds to wait for more data from a
773 master/slave connection before aborting the read.
774 --slave_transaction_retries=#
775 Number of times the slave SQL thread will retry a
776 transaction in case it failed with a deadlock or elapsed
777 lock wait timeout, before giving up and stopping.
778 --slow-query-log Enable/disable slow query log.
779 --slow_launch_time=#
780 If creating the thread takes longer than this value (in
781 seconds), the Slow_launch_threads counter will be
782 incremented.
783 --slow_query_log_file=name
784 Log slow queries to given log file. Defaults logging to
785 hostname-slow.log. Must be enabled to activate other slow
786 log options.
787 --socket=name Socket file to use for connection.
788 --sort_buffer_size=#
789 Each thread that needs to do a sort allocates a buffer of
790 this size.
791 --sporadic-binlog-dump-fail
792 Option used by mysql-test for debugging and testing of
793 replication.
794 --sql-bin-update-same=#
795 The update log is deprecated since version 5.0, is
796 replaced by the binary log and this option does nothing
797 anymore.
798 --sql-mode=name Syntax: sql-mode=option[,option[,option...]] where option
799 can be one of: REAL_AS_FLOAT, PIPES_AS_CONCAT,
800 ANSI_QUOTES, IGNORE_SPACE, ONLY_FULL_GROUP_BY,
801 NO_UNSIGNED_SUBTRACTION.
802 --ssl Enable SSL for connection (automatically enabled with
803 other flags).Disable with --skip-ssl.
804 --ssl-ca=name CA file in PEM format (check OpenSSL docs, implies
805 --ssl).
806 --ssl-capath=name CA directory (check OpenSSL docs, implies --ssl).
807 --ssl-cert=name X509 cert in PEM format (implies --ssl).
808 --ssl-cipher=name SSL cipher to use (implies --ssl).
809 --ssl-key=name X509 key in PEM format (implies --ssl).
810 -s, --symbolic-links
811 Enable symbolic link support.
812 --sync-binlog=# Synchronously flush binary log to disk after every #th
813 event. Use 0 (default) to disable synchronous flushing.
814 --sync-frm Sync .frm to disk on create. Enabled by default.
815 --sysdate-is-now Non-default option to alias SYSDATE() to NOW() to make it
816 safe-replicable. Since 5.0, SYSDATE() returns a `dynamic'
817 value different for different invocations, even within
818 the same statement.
819 --table_cache=# Deprecated; use --table_open_cache instead.
820 --table_definition_cache=#
821 The number of cached table definitions.
822 --table_lock_wait_timeout=#
823 Timeout in seconds to wait for a table level lock before
824 returning an error. Used only if the connection has
825 active cursors.
826 --table_open_cache=#
827 The number of cached open tables.
828 --tc-heuristic-recover=name
829 Decision to use in heuristic recover process. Possible
830 values are COMMIT or ROLLBACK.
831 --temp-pool Using this option will cause most temporary files created
832 to use a small set of names, rather than a unique name
833 for each new file.
834 --thread_cache_size=#
835 How many threads we should keep in a cache for reuse.
836 --thread_concurrency=#
837 Permits the application to give the threads system a hint
838 for the desired number of threads that should be run at
839 the same time.
840 --thread_handling=name
841 Define threads usage for handling queries:
842 one-thread-per-connection or no-threads.
843 --thread_stack=# The stack size for each thread.
844 --timed_mutexes Specify whether to time mutexes (only InnoDB mutexes are
845 currently supported).
846 --time_format=name The TIME format (for future).
847 -t, --tmpdir=name Path for temporary files. Several paths may be specified,
848 separated by a colon (:), in this case they are used in a
849 round-robin fashion.
850 --tmp_table_size=# If an internal in-memory temporary table exceeds this
851 size, MySQL will automatically convert it to an on-disk
852 MyISAM table.
853 --transaction-isolation=name
854 Default transaction isolation level.
855 --transaction_alloc_block_size=#
856 Allocation block size for transactions to be stored in
857 binary log.
858 --transaction_prealloc_size=#
859 Persistent buffer for transactions to be stored in binary
860 log.
861 --updatable_views_with_limit=#
862 1 = YES = Don't issue an error message (warning only) if
863 a VIEW without presence of a key of the underlying table
864 is used in queries with a LIMIT clause for updating. 0 =
865 NO = Prohibit update of a VIEW, which does not contain a
866 key of the underlying table and the query uses a LIMIT
867 clause (usually get from GUI tools).
868 --use-symbolic-links
869 Enable symbolic link support. Deprecated option; use
870 --symbolic-links instead.
871 -u, --user=name Run mysqld daemon as user.
872 -v, --verbose Used with --help option for detailed help.
873 -V, --version Output version information and exit.
874 --wait_timeout=# The number of seconds the server waits for activity on a
875 connection before closing it.
876 --warnings[=#] Deprecated; use --log-warnings instead.