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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'. --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.) --avoid-temporal-upgrade When this option is enabled, the pre-5.6.4 temporal types are not upgraded to the new format for ALTER TABLE requests ADD/CHANGE/MODIFY COLUMN, ADD INDEX or FORCE operation. This variable is deprecated and will be removed in a future release. --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-error-action=name When statements cannot be written to the binary log due to a fatal error, the server can either ignore the error and let the master continue, or abort. --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-gtid-simple-recovery If this option is enabled, the server does not open more than two binary logs when initializing GTID_PURGED and GTID_EXECUTED, either during server restart or when binary logs are being purged. Enabling this option is useful when the server has already generated many binary logs without GTID events (e.g., having GTID_MODE = OFF). Note: If this option is enabled, GLOBAL.GTID_EXECUTED and GLOBAL.GTID_PURGED may be initialized wrongly in two cases: (1) GTID_MODE was ON for some binary logs but OFF for the newest binary log. (2) SET GTID_PURGED was issued after the oldest existing binary log was generated. If a wrong set is computed in one of case (1) or case (2), it will remain wrong even if the server is later restarted with this option disabled. --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 --binlogging-impossible-mode=name On a fatal error when statements cannot be binlogged the behaviour can be ignore the error and let the master continue or abort the server. This variable is deprecated and will be removed in a future release. Please use binlog_error_action instead. --block-encryption-mode=name mode for AES_ENCRYPT/AES_DECRYPT --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. --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. --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 --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. -W, --log-warnings[=#] Log some not critical warnings to the log file --long-query-time=# Log all queries that have taken more than long_query_time seconds to execute to file. The argument will be treated as a decimal value with microsecond precision --low-priority-updates INSERT/DELETE/UPDATE has lower priority than selects --lower-case-table-names[=#] If set to 1 table names are stored in lowercase on disk and table names will be case-insensitive. Should be set to 2 if you are using a case insensitive file system --master-info-file=name The location and name of the file that remembers the master and where the I/O replication thread is in the master's binlogs. --master-info-repository=name Defines the type of the repository for the master information. --master-retry-count=# The number of tries the slave will make to connect to the master before giving up. Deprecated option, use 'CHANGE MASTER TO master_retry_count = <num>' instead. --master-verify-checksum Force checksum verification of logged events in binary log before sending them to slaves or printing them in output of SHOW BINLOG EVENTS. Disabled by default. --max-allowed-packet=# Max packet length to send to or receive from the server --max-binlog-cache-size=# Sets the total size of the transactional cache --max-binlog-dump-events=# Option used by mysql-test for debugging and testing of replication. --max-binlog-size=# Binary log will be rotated automatically when the size exceeds this value. Will also apply to relay logs if max_relay_log_size is 0 --max-binlog-stmt-cache-size=# Sets the total size of the statement cache --max-connect-errors=# If there is more than this number of interrupted connections from a host this host will be blocked from further connections --max-connections=# The number of simultaneous clients allowed --max-delayed-threads=# Don't start more than this number of threads to handle INSERT DELAYED statements. If set to zero INSERT DELAYED will be not used.This variable is deprecated along with INSERT DELAYED. --max-digest-length=# Maximum length considered for digest text. --max-error-count=# Max number of errors/warnings to store for a statement --max-heap-table-size=# Don't allow creation of heap tables bigger than this --max-join-size=# Joins that are probably going to read more than max_join_size records return an error --max-length-for-sort-data=# Max number of bytes in sorted records --max-prepared-stmt-count=# Maximum number of prepared statements in the server --max-relay-log-size=# If non-zero: relay log will be rotated automatically when the size exceeds this value; if zero: when the size exceeds max_binlog_size --max-seeks-for-key=# Limit assumed max number of seeks when looking up rows based on a key --max-sort-length=# The number of bytes to use when sorting BLOB or TEXT values (only the first max_sort_length bytes of each value are used; the rest are ignored) --max-sp-recursion-depth[=#] Maximum stored procedure recursion depth --max-tmp-tables=# Maximum number of temporary tables a client can keep open at a time --max-user-connections=# The maximum number of active connections for a single user (0 = no limit) --max-write-lock-count=# After this many write locks, allow some read locks to run in between --memlock Lock mysqld in memory. --metadata-locks-cache-size=# Size of unused metadata locks cache --metadata-locks-hash-instances=# Number of metadata locks hash instances --min-examined-row-limit=# Don't write queries to slow log that examine fewer rows than that --multi-range-count=# Number of key ranges to request at once. This variable has no effect, and is deprecated. It will be removed in a future release. --myisam-block-size=# Block size to be used for MyISAM index pages --myisam-data-pointer-size=# Default pointer size to be used for MyISAM tables --myisam-max-sort-file-size=# Don't use the fast sort index method to created index if the temporary file would get bigger than this --myisam-mmap-size=# Restricts the total memory used for memory mapping of MySQL tables --myisam-recover-options[=name] Syntax: myisam-recover-options[=option[,option...]], where option can be DEFAULT, BACKUP, FORCE, QUICK, or OFF --myisam-repair-threads=# If larger than 1, when repairing a MyISAM table all indexes will be created in parallel, with one thread per index. The value of 1 disables parallel repair --myisam-sort-buffer-size=# The buffer that is allocated when sorting the index when doing a REPAIR or when creating indexes with CREATE INDEX or ALTER TABLE --myisam-stats-method=name Specifies how MyISAM index statistics collection code should treat NULLs. Possible values of name are NULLS_UNEQUAL (default behavior for 4.1 and later), NULLS_EQUAL (emulate 4.0 behavior), and NULLS_IGNORED --myisam-use-mmap Use memory mapping for reading and writing MyISAM tables --net-buffer-length=# Buffer length for TCP/IP and socket communication --net-read-timeout=# Number of seconds to wait for more data from a connection before aborting the read --net-retry-count=# If a read on a communication port is interrupted, retry this many times before giving up --net-write-timeout=# Number of seconds to wait for a block to be written to a connection before aborting the write -n, --new Use very new possible "unsafe" functions --old Use compatible behavior --old-alter-table Use old, non-optimized alter table --old-passwords=# Determine which hash algorithm to use when generating passwords using the PASSWORD() function --old-style-user-limits Enable old-style user limits (before 5.0.3, user resources were counted per each user+host vs. per account). --open-files-limit=# If this is not 0, then mysqld will use this value to reserve file descriptors to use with setrlimit(). If this value is 0 then mysqld will reserve max_connections*5 or max_connections + table_open_cache*2 (whichever is larger) number of file descriptors --optimizer-prune-level=# Controls the heuristic(s) applied during query optimization to prune less-promising partial plans from the optimizer search space. Meaning: 0 - do not apply any heuristic, thus perform exhaustive search; 1 - prune plans based on number of retrieved rows --optimizer-search-depth=# Maximum depth of search performed by the query optimizer. Values larger than the number of relations in a query result in better query plans, but take longer to compile a query. Values smaller than the number of tables in a relation result in faster optimization, but may produce very bad query plans. If set to 0, the system will automatically pick a reasonable value --optimizer-switch=name optimizer_switch=option=val[,option=val...], where option is one of {index_merge, index_merge_union, index_merge_sort_union, index_merge_intersection, engine_condition_pushdown, index_condition_pushdown, mrr, mrr_cost_based, materialization, semijoin, loosescan, firstmatch, subquery_materialization_cost_based, block_nested_loop, batched_key_access, use_index_extensions} and val is one of {on, off, default} --optimizer-trace=name Controls tracing of the Optimizer: optimizer_trace=option=val[,option=val...], where option is one of {enabled, one_line} and val is one of {on, default} --optimizer-trace-features=name Enables/disables tracing of selected features of the Optimizer: optimizer_trace_features=option=val[,option=val...], where option is one of {greedy_search, range_optimizer, dynamic_range, repeated_subselect} and val is one of {on, off, default} --optimizer-trace-limit=# Maximum number of shown optimizer traces --optimizer-trace-max-mem-size=# Maximum allowed cumulated size of stored optimizer traces --optimizer-trace-offset=# Offset of first optimizer trace to show; see manual --performance-schema Enable the performance schema. (Defaults to on; use --skip-performance-schema to disable.) --performance-schema-accounts-size=# Maximum number of instrumented user@host accounts. Use 0 to disable, -1 for automated sizing. --performance-schema-consumer-events-stages-current Default startup value for the events_stages_current consumer. --performance-schema-consumer-events-stages-history Default startup value for the events_stages_history consumer. --performance-schema-consumer-events-stages-history-long Default startup value for the events_stages_history_long consumer. --performance-schema-consumer-events-statements-current Default startup value for the events_statements_current consumer. (Defaults to on; use --skip-performance-schema-consumer-events-statements-current to disable.) --performance-schema-consumer-events-statements-history Default startup value for the events_statements_history consumer. --performance-schema-consumer-events-statements-history-long Default startup value for the events_statements_history_long consumer. --performance-schema-consumer-events-waits-current Default startup value for the events_waits_current consumer. --performance-schema-consumer-events-waits-history Default startup value for the events_waits_history consumer. --performance-schema-consumer-events-waits-history-long Default startup value for the events_waits_history_long consumer. --performance-schema-consumer-global-instrumentation Default startup value for the global_instrumentation consumer. (Defaults to on; use --skip-performance-schema-consumer-global-instrumentation to disable.) --performance-schema-consumer-statements-digest Default startup value for the statements_digest consumer. (Defaults to on; use --skip-performance-schema-consumer-statements-digest to disable.) --performance-schema-consumer-thread-instrumentation Default startup value for the thread_instrumentation consumer. (Defaults to on; use --skip-performance-schema-consumer-thread-instrumentation to disable.) --performance-schema-digests-size=# Size of the statement digest. Use 0 to disable, -1 for automated sizing. --performance-schema-events-stages-history-long-size=# Number of rows in EVENTS_STAGES_HISTORY_LONG. Use 0 to disable, -1 for automated sizing. --performance-schema-events-stages-history-size=# Number of rows per thread in EVENTS_STAGES_HISTORY. Use 0 to disable, -1 for automated sizing. --performance-schema-events-statements-history-long-size=# Number of rows in EVENTS_STATEMENTS_HISTORY_LONG. Use 0 to disable, -1 for automated sizing. --performance-schema-events-statements-history-size=# Number of rows per thread in EVENTS_STATEMENTS_HISTORY. Use 0 to disable, -1 for automated sizing. --performance-schema-events-waits-history-long-size=# Number of rows in EVENTS_WAITS_HISTORY_LONG. Use 0 to disable, -1 for automated sizing. --performance-schema-events-waits-history-size=# Number of rows per thread in EVENTS_WAITS_HISTORY. Use 0 to disable, -1 for automated sizing. --performance-schema-hosts-size=# Maximum number of instrumented hosts. Use 0 to disable, -1 for automated sizing. --performance-schema-instrument[=name] Default startup value for a performance schema instrument. --performance-schema-max-cond-classes=# Maximum number of condition instruments. --performance-schema-max-cond-instances=# Maximum number of instrumented condition objects. Use 0 to disable, -1 for automated sizing. --performance-schema-max-digest-length=# Maximum length considered for digest text, when stored in performance_schema tables. --performance-schema-max-file-classes=# Maximum number of file instruments. --performance-schema-max-file-handles=# Maximum number of opened instrumented files. --performance-schema-max-file-instances=# Maximum number of instrumented files. Use 0 to disable, -1 for automated sizing. --performance-schema-max-mutex-classes=# Maximum number of mutex instruments. --performance-schema-max-mutex-instances=# Maximum number of instrumented MUTEX objects. Use 0 to disable, -1 for automated sizing. --performance-schema-max-rwlock-classes=# Maximum number of rwlock instruments. --performance-schema-max-rwlock-instances=# Maximum number of instrumented RWLOCK objects. Use 0 to disable, -1 for automated sizing. --performance-schema-max-socket-classes=# Maximum number of socket instruments. --performance-schema-max-socket-instances=# Maximum number of opened instrumented sockets. Use 0 to disable, -1 for automated sizing. --performance-schema-max-stage-classes=# Maximum number of stage instruments. --performance-schema-max-statement-classes=# Maximum number of statement instruments. --performance-schema-max-table-handles=# Maximum number of opened instrumented tables. Use 0 to disable, -1 for automated sizing. --performance-schema-max-table-instances=# Maximum number of instrumented tables. Use 0 to disable, -1 for automated sizing. --performance-schema-max-thread-classes=# Maximum number of thread instruments. --performance-schema-max-thread-instances=# Maximum number of instrumented threads. Use 0 to disable, -1 for automated sizing. --performance-schema-session-connect-attrs-size=# Size of session attribute string buffer per thread. Use 0 to disable, -1 for automated sizing. --performance-schema-setup-actors-size=# Maximum number of rows in SETUP_ACTORS. --performance-schema-setup-objects-size=# Maximum number of rows in SETUP_OBJECTS. --performance-schema-users-size=# Maximum number of instrumented users. Use 0 to disable, -1 for automated sizing. --pid-file=name Pid file used by safe_mysqld --plugin-dir=name Directory for plugins --plugin-load=name Optional semicolon-separated list of plugins to load, where each plugin is identified as name=library, where name is the plugin name and library is the plugin library in plugin_dir. --plugin-load-add=name Optional semicolon-separated list of plugins to load, where each plugin is identified as name=library, where name is the plugin name and library is the plugin library in plugin_dir. This option adds to the list speficied by --plugin-load in an incremental way. Multiple --plugin-load-add are supported. -P, --port=# Port number to use for connection or 0 to default to, my.cnf, $MYSQL_TCP_PORT, /etc/services, built-in default (3306), whatever comes first --port-open-timeout=# Maximum time in seconds to wait for the port to become free. (Default: No wait). --preload-buffer-size=# The size of the buffer that is allocated when preloading indexes --profiling-history-size=# Limit of query profiling memory --query-alloc-block-size=# Allocation block size for query parsing and execution --query-cache-limit=# Don't cache results that are bigger than this --query-cache-min-res-unit=# The minimum size for blocks allocated by the query cache --query-cache-size=# The memory allocated to store results from old queries --query-cache-type=name OFF = Don't cache or retrieve results. ON = Cache all results except SELECT SQL_NO_CACHE ... queries. DEMAND = Cache only SELECT SQL_CACHE ... queries --query-cache-wlock-invalidate Invalidate queries in query cache on LOCK for write --query-prealloc-size=# Persistent buffer for query parsing and execution --range-alloc-block-size=# Allocation block size for storing ranges during optimization --read-buffer-size=# Each thread that does a sequential scan allocates a buffer of this size for each table it scans. If you do many sequential scans, you may want to increase this value --read-only Make all non-temporary tables read-only, with the exception for replication (slave) threads and users with the SUPER privilege --read-rnd-buffer-size=# When reading rows in sorted order after a sort, the rows are read through this buffer to avoid a disk seeks --relay-log=name The location and name to use for relay logs --relay-log-index=name File that holds the names for relay log files. --relay-log-info-file=name The location and name of the file that remembers where the SQL replication thread is in the relay logs --relay-log-info-repository=name Defines the type of the repository for the relay log information and associated workers. --relay-log-purge if disabled - do not purge relay logs. if enabled - purge them as soon as they are no more needed (Defaults to on; use --skip-relay-log-purge to disable.) --relay-log-recovery Enables automatic relay log recovery right after the database startup, which means that the IO Thread starts re-fetching from the master right after the last transaction processed --relay-log-space-limit=# Maximum space to use for all relay logs --replicate-do-db=name Tells the slave thread to restrict replication to the specified database. To specify more than one database, use the directive multiple times, once for each database. Note that this will only work if you do not use cross-database queries such as UPDATE some_db.some_table SET foo='bar' while having selected a different or no database. If you need cross database updates to work, make sure you have 3.23.28 or later, and use replicate-wild-do-table=db_name.%. --replicate-do-table=name Tells the slave thread to restrict replication to the specified table. To specify more than one table, use the directive multiple times, once for each table. This will work for cross-database updates, in contrast to replicate-do-db. --replicate-ignore-db=name Tells the slave thread to not replicate to the specified database. To specify more than one database to ignore, use the directive multiple times, once for each database. This option will not work if you use cross database updates. If you need cross database updates to work, make sure you have 3.23.28 or later, and use replicate-wild-ignore-table=db_name.%. --replicate-ignore-table=name Tells the slave thread to not replicate to the specified table. To specify more than one table to ignore, use the directive multiple times, once for each table. This will work for cross-database updates, in contrast to replicate-ignore-db. --replicate-rewrite-db=name Updates to a database with a different name than the original. Example: replicate-rewrite-db=master_db_name->slave_db_name. --replicate-same-server-id In replication, if set to 1, do not skip events having our server id. Default value is 0 (to break infinite loops in circular replication). Can't be set to 1 if --log-slave-updates is used. --replicate-wild-do-table=name Tells the slave thread to restrict replication to the tables that match the specified wildcard pattern. To specify more than one table, use the directive multiple times, once for each table. This will work for cross-database updates. Example: replicate-wild-do-table=foo%.bar% will replicate only updates to tables in all databases that start with foo and whose table names start with bar. --replicate-wild-ignore-table=name Tells the slave thread to not replicate to the tables that match the given wildcard pattern. To specify more than one table to ignore, use the directive multiple times, once for each table. This will work for cross-database updates. Example: replicate-wild-ignore-table=foo%.bar% will not do updates to tables in databases that start with foo and whose table names start with bar. --report-host=name Hostname or IP of the slave to be reported to the master during slave registration. Will appear in the output of SHOW SLAVE HOSTS. Leave unset if you do not want the slave to register itself with the master. Note that it is not sufficient for the master to simply read the IP of the slave off the socket once the slave connects. Due to NAT and other routing issues, that IP may not be valid for connecting to the slave from the master or other hosts --report-password=name The account password of the slave to be reported to the master during slave registration --report-port=# Port for connecting to slave reported to the master during slave registration. Set it only if the slave is listening on a non-default port or if you have a special tunnel from the master or other clients to the slave. If not sure, leave this option unset --report-user=name The account user name of the slave to be reported to the master during slave registration --rpl-stop-slave-timeout=# Timeout in seconds to wait for slave to stop before returning a warning. --safe-user-create Don't allow new user creation by the user who has no write privileges to the mysql.user table. --secure-auth Disallow authentication for accounts that have old (pre-4.1) passwords (Defaults to on; use --skip-secure-auth to disable.) --secure-file-priv=name Limit LOAD DATA, SELECT ... OUTFILE, and LOAD_FILE() to files within specified directory --server-id=# Uniquely identifies the server instance in the community of replication partners --server-id-bits=# Set number of significant bits in server-id --show-old-temporals When this option is enabled, the pre-5.6.4 temporal types will be marked in the 'SHOW CREATE TABLE' and 'INFORMATION_SCHEMA.COLUMNS' table as a comment in COLUMN_TYPE field. This variable is deprecated and will be removed in a future release. --show-slave-auth-info Show user and password in SHOW SLAVE HOSTS on this master. --simplified-binlog-gtid-recovery Alias for @@binlog_gtid_simple_recovery. Deprecated --skip-grant-tables Start without grant tables. This gives all users FULL ACCESS to all tables. --skip-host-cache Don't cache host names. --skip-name-resolve Don't resolve hostnames. All hostnames are IP's or 'localhost'. --skip-networking Don't allow connection with TCP/IP --skip-new Don't use new, possibly wrong routines. --skip-show-database Don't allow 'SHOW DATABASE' commands --skip-slave-start If set, slave is not autostarted. --skip-stack-trace Don't print a stack trace on failure. --slave-allow-batching Allow slave to batch requests --slave-checkpoint-group=# Maximum number of processed transactions by Multi-threaded slave before a checkpoint operation is called to update progress status. --slave-checkpoint-period=# Gather workers' activities to Update progress status of Multi-threaded slave and flush the relay log info to disk after every #th milli-seconds. --slave-compressed-protocol Use compression on master/slave protocol --slave-exec-mode=name Modes for how replication events should be executed. Legal values are STRICT (default) and IDEMPOTENT. In IDEMPOTENT mode, replication will not stop for operations that are idempotent. In STRICT mode, replication will stop on any unexpected difference between the master and the slave --slave-load-tmpdir=name The location where the slave should put its temporary files when replicating a LOAD DATA INFILE command --slave-max-allowed-packet=# The maximum packet length to sent successfully from the master to slave. --slave-net-timeout=# Number of seconds to wait for more data from a master/slave connection before aborting the read --slave-parallel-workers=# Number of worker threads for executing events in parallel --slave-pending-jobs-size-max=# Max size of Slave Worker queues holding yet not applied events.The least possible value must be not less than the master side max_allowed_packet. --slave-rows-search-algorithms=name Set of searching algorithms that the slave will use while searching for records from the storage engine to either updated or deleted them. Possible values are: INDEX_SCAN, TABLE_SCAN and HASH_SCAN. Any combination is allowed, and the slave will always pick the most suitable algorithm for any given scenario. (Default: INDEX_SCAN, TABLE_SCAN). --slave-skip-errors=name Tells the slave thread to continue replication when a query event returns an error from the provided list --slave-sql-verify-checksum Force checksum verification of replication events after reading them from relay log. Note: Events are always checksum-verified by slave on receiving them from the network before writing them to the relay log. Enabled by default. (Defaults to on; use --skip-slave-sql-verify-checksum to disable.) --slave-transaction-retries=# Number of times the slave SQL thread will retry a transaction in case it failed with a deadlock or elapsed lock wait timeout, before giving up and stopping --slave-type-conversions=name Set of slave type conversions that are enabled. Legal values are: ALL_LOSSY to enable lossy conversions, ALL_NON_LOSSY to enable non-lossy conversions, ALL_UNSIGNED to treat all integer column type data to be unsigned values, and ALL_SIGNED to treat all integer column type data to be signed values. Default treatment is ALL_SIGNED. If ALL_SIGNED and ALL_UNSIGNED both are specifed, ALL_SIGNED will take high priority than ALL_UNSIGNED. If the variable is assigned the empty set, no conversions are allowed and it is expected that the types match exactly. --slow-launch-time=# If creating the thread takes longer than this value (in seconds), the Slow_launch_threads counter will be incremented --slow-query-log Log slow queries to a table or log file. Defaults logging to a file hostname-slow.log or a table mysql.slow_log if --log-output=TABLE is used. Must be enabled to activate other slow log options --slow-query-log-file=name Log slow queries to given log file. Defaults logging to hostname-slow.log. Must be enabled to activate other slow log options --socket=name Socket file to use for connection --sort-buffer-size=# Each thread that needs to do a sort allocates a buffer of this size --sporadic-binlog-dump-fail Option used by mysql-test for debugging and testing of replication. --sql-mode=name Syntax: sql-mode=mode[,mode[,mode...]]. See the manual for the complete list of valid sql modes --stored-program-cache=# The soft upper limit for number of cached stored routines for one connection. -s, --symbolic-links Enable symbolic link support. --sync-binlog=# Synchronously flush binary log to disk after every #th write to the file. Use 0 (default) to disable synchronous flushing --sync-frm Sync .frm files to disk on creation (Defaults to on; use --skip-sync-frm to disable.) --sync-master-info=# Synchronously flush master info to disk after every #th event. Use 0 to disable synchronous flushing --sync-relay-log=# Synchronously flush relay log to disk after every #th event. Use 0 to disable synchronous flushing --sync-relay-log-info=# Synchronously flush relay log info to disk after every #th transaction. Use 0 to disable synchronous flushing --sysdate-is-now Non-default option to alias SYSDATE() to NOW() to make it safe-replicable. Since 5.0, SYSDATE() returns a `dynamic' value different for different invocations, even within the same statement. --table-definition-cache=# The number of cached table definitions --table-open-cache=# The number of cached open tables (total for all table cache instances) --table-open-cache-instances=# The number of table cache instances --tc-heuristic-recover=name Decision to use in heuristic recover process. Possible values are COMMIT or ROLLBACK. --thread-cache-size=# How many threads we should keep in a cache for reuse --thread-handling=name Define threads usage for handling queries, one of one-thread-per-connection, no-threads, loaded-dynamically --thread-stack=# The stack size for each thread --time-format=name The TIME format (ignored) --timed-mutexes Specify whether to time mutexes. Deprecated, has no effect. --tmp-table-size=# If an internal in-memory temporary table exceeds this size, MySQL will automatically convert it to an on-disk MyISAM table -t, --tmpdir=name Path for temporary files. Several paths may be specified, separated by a colon (:), in this case they are used in a round-robin fashion --transaction-alloc-block-size=# Allocation block size for transactions to be stored in binary log --transaction-isolation=name Default transaction isolation level. --transaction-prealloc-size=# Persistent buffer for transactions to be stored in binary log --transaction-read-only Default transaction access mode. True if transactions are read-only. --updatable-views-with-limit=name YES = Don't issue an error message (warning only) if a VIEW without presence of a key of the underlying table is used in queries with a LIMIT clause for updating. NO = Prohibit update of a VIEW, which does not contain a key of the underlying table and the query uses a LIMIT clause (usually get from GUI tools) -u, --user=name Run mysqld daemon as user. --validate-user-plugins Turns on additional validation of authentication plugins assigned to user accounts. (Defaults to on; use --skip-validate-user-plugins to disable.) -v, --verbose Used with --help option for detailed help. -V, --version Output version information and exit. --wait-timeout=# The number of seconds the server waits for activity on a connection before closing it Variables (--variable-name=value) abort-slave-event-count 0 allow-suspicious-udfs FALSE auto-increment-increment 1 auto-increment-offset 1 autocommit TRUE automatic-sp-privileges TRUE avoid-temporal-upgrade FALSE back-log 80 big-tables FALSE bind-address * binlog-cache-size 32768 binlog-checksum CRC32 binlog-direct-non-transactional-updates FALSE binlog-error-action IGNORE_ERROR binlog-format STATEMENT binlog-gtid-simple-recovery FALSE binlog-max-flush-queue-time 0 binlog-order-commits TRUE binlog-row-event-max-size 8192 binlog-row-image FULL binlog-rows-query-log-events FALSE binlog-stmt-cache-size 32768 binlogging-impossible-mode IGNORE_ERROR block-encryption-mode aes-128-ecb bulk-insert-buffer-size 8388608 character-set-client-handshake TRUE character-set-filesystem binary character-set-server latin1 character-sets-dir MYSQL_CHARSETSDIR/ chroot (No default value) collation-server latin1_swedish_ci completion-type NO_CHAIN concurrent-insert AUTO connect-timeout 10 console FALSE date-format %Y-%m-%d datetime-format %Y-%m-%d %H:%i:%s default-storage-engine InnoDB default-time-zone (No default value) default-tmp-storage-engine InnoDB default-week-format 0 delay-key-write ON delayed-insert-limit 100 delayed-insert-timeout 300 delayed-queue-size 1000 disconnect-on-expired-password TRUE disconnect-slave-event-count 0 div-precision-increment 4 end-markers-in-json FALSE enforce-gtid-consistency FALSE eq-range-index-dive-limit 10 event-scheduler OFF expire-logs-days 0 explicit-defaults-for-timestamp FALSE external-locking FALSE flush FALSE flush-time 0 ft-boolean-syntax + -><()~*:""&| ft-max-word-len 84 ft-min-word-len 4 ft-query-expansion-limit 20 ft-stopword-file (No default value) gdb FALSE general-log FALSE group-concat-max-len 1024 gtid-mode OFF help TRUE host-cache-size 279 ignore-builtin-innodb FALSE init-connect init-file (No default value) init-slave interactive-timeout 28800 join-buffer-size 262144 keep-files-on-create FALSE key-buffer-size 8388608 key-cache-age-threshold 300 key-cache-block-size 1024 key-cache-division-limit 100 language MYSQL_SHAREDIR/ large-pages FALSE lc-messages en_US lc-messages-dir MYSQL_SHAREDIR/ lc-time-names en_US local-infile TRUE lock-wait-timeout 31536000 log-bin (No default value) log-bin-index (No default value) log-bin-trust-function-creators FALSE log-bin-use-v1-row-events FALSE log-error log-isam myisam.log log-output FILE log-queries-not-using-indexes FALSE log-raw FALSE log-short-format FALSE log-slave-updates FALSE log-slow-admin-statements FALSE log-slow-slave-statements FALSE log-tc tc.log log-tc-size 24576 log-throttle-queries-not-using-indexes 0 log-warnings 1 long-query-time 10 low-priority-updates FALSE lower-case-table-names 1 master-info-file master.info master-info-repository FILE master-retry-count 86400 master-verify-checksum FALSE max-allowed-packet 4194304 max-binlog-cache-size 18446744073709547520 max-binlog-dump-events 0 max-binlog-size 1073741824 max-binlog-stmt-cache-size 18446744073709547520 max-connect-errors 100 max-connections 151 max-delayed-threads 20 max-digest-length 1024 max-error-count 64 max-heap-table-size 16777216 max-join-size 18446744073709551615 max-length-for-sort-data 1024 max-prepared-stmt-count 16382 max-relay-log-size 0 max-seeks-for-key 18446744073709551615 max-sort-length 1024 max-sp-recursion-depth 0 max-tmp-tables 32 max-user-connections 0 max-write-lock-count 18446744073709551615 memlock FALSE metadata-locks-cache-size 1024 metadata-locks-hash-instances 8 min-examined-row-limit 0 multi-range-count 256 myisam-block-size 1024 myisam-data-pointer-size 6 myisam-max-sort-file-size 9223372036853727232 myisam-mmap-size 18446744073709551615 myisam-recover-options OFF myisam-repair-threads 1 myisam-sort-buffer-size 8388608 myisam-stats-method nulls_unequal myisam-use-mmap FALSE net-buffer-length 16384 net-read-timeout 30 net-retry-count 10 net-write-timeout 60 new FALSE old FALSE old-alter-table FALSE old-passwords 0 old-style-user-limits FALSE optimizer-prune-level 1 optimizer-search-depth 62 optimizer-switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on,index_condition_pushdown=on,mrr=on,mrr_cost_based=on,block_nested_loop=on,batched_key_access=off,materialization=on,semijoin=on,loosescan=on,firstmatch=on,subquery_materialization_cost_based=on,use_index_extensions=on optimizer-trace optimizer-trace-features greedy_search=on,range_optimizer=on,dynamic_range=on,repeated_subselect=on optimizer-trace-limit 1 optimizer-trace-max-mem-size 16384 optimizer-trace-offset -1 performance-schema TRUE performance-schema-accounts-size -1 performance-schema-consumer-events-stages-current FALSE performance-schema-consumer-events-stages-history FALSE performance-schema-consumer-events-stages-history-long FALSE performance-schema-consumer-events-statements-current TRUE performance-schema-consumer-events-statements-history FALSE performance-schema-consumer-events-statements-history-long FALSE performance-schema-consumer-events-waits-current FALSE performance-schema-consumer-events-waits-history FALSE performance-schema-consumer-events-waits-history-long FALSE performance-schema-consumer-global-instrumentation TRUE performance-schema-consumer-statements-digest TRUE performance-schema-consumer-thread-instrumentation TRUE performance-schema-digests-size -1 performance-schema-events-stages-history-long-size -1 performance-schema-events-stages-history-size -1 performance-schema-events-statements-history-long-size -1 performance-schema-events-statements-history-size -1 performance-schema-events-waits-history-long-size -1 performance-schema-events-waits-history-size -1 performance-schema-hosts-size -1 performance-schema-instrument performance-schema-max-cond-classes 80 performance-schema-max-cond-instances -1 performance-schema-max-digest-length 1024 performance-schema-max-file-classes 50 performance-schema-max-file-handles 32768 performance-schema-max-file-instances -1 performance-schema-max-mutex-classes 200 performance-schema-max-mutex-instances -1 performance-schema-max-rwlock-classes 40 performance-schema-max-rwlock-instances -1 performance-schema-max-socket-classes 10 performance-schema-max-socket-instances -1 performance-schema-max-stage-classes 150 performance-schema-max-statement-classes 168 performance-schema-max-table-handles -1 performance-schema-max-table-instances -1 performance-schema-max-thread-classes 50 performance-schema-max-thread-instances -1 performance-schema-session-connect-attrs-size -1 performance-schema-setup-actors-size 100 performance-schema-setup-objects-size 100 performance-schema-users-size -1 port #### port-open-timeout 0 preload-buffer-size 32768 profiling-history-size 15 query-alloc-block-size 8192 query-cache-limit 1048576 query-cache-min-res-unit 4096 query-cache-size 1048576 query-cache-type OFF query-cache-wlock-invalidate FALSE query-prealloc-size 8192 range-alloc-block-size 4096 read-buffer-size 131072 read-only FALSE read-rnd-buffer-size 262144 relay-log (No default value) relay-log-index (No default value) relay-log-info-file relay-log.info relay-log-info-repository FILE relay-log-purge TRUE relay-log-recovery FALSE relay-log-space-limit 0 replicate-same-server-id FALSE report-host (No default value) report-password (No default value) report-port 0 report-user (No default value) rpl-stop-slave-timeout 31536000 safe-user-create FALSE secure-auth TRUE server-id 0 server-id-bits 32 show-old-temporals FALSE show-slave-auth-info FALSE simplified-binlog-gtid-recovery FALSE skip-grant-tables TRUE skip-name-resolve FALSE skip-networking FALSE skip-show-database FALSE skip-slave-start FALSE slave-allow-batching FALSE slave-checkpoint-group 512 slave-checkpoint-period 300 slave-compressed-protocol FALSE slave-exec-mode STRICT slave-max-allowed-packet 1073741824 slave-net-timeout 3600 slave-parallel-workers 0 slave-pending-jobs-size-max 16777216 slave-rows-search-algorithms TABLE_SCAN,INDEX_SCAN slave-skip-errors (No default value) slave-sql-verify-checksum TRUE slave-transaction-retries 10 slave-type-conversions slow-launch-time 2 slow-query-log FALSE sort-buffer-size 262144 sporadic-binlog-dump-fail FALSE sql-mode NO_ENGINE_SUBSTITUTION stored-program-cache 256 symbolic-links FALSE sync-binlog 0 sync-frm TRUE sync-master-info 10000 sync-relay-log 10000 sync-relay-log-info 10000 sysdate-is-now FALSE table-open-cache-instances 1 tc-heuristic-recover COMMIT thread-cache-size 9 thread-handling one-thread-per-connection thread-stack 262144 time-format %H:%i:%s timed-mutexes FALSE tmp-table-size 16777216 transaction-alloc-block-size 8192 transaction-isolation REPEATABLE-READ transaction-prealloc-size 4096 transaction-read-only FALSE updatable-views-with-limit YES validate-user-plugins TRUE verbose TRUE wait-timeout 28800 To see what values a running MySQL server is using, type 'mysqladmin variables' instead of 'mysqld --verbose --help'.