mariadb/mysql-test/r/mysqld--help.result

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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.
--defaults-file=# Only read default options from the given file #.
--defaults-extra-file=# Read this file after the global files are read.

 --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.)
 --back-log=#        The number of outstanding connection requests MariaDB can
 have. This comes into play when the main MariaDB thread
 gets very many connection requests in a very short time
 (Automatically configured unless set explicitly)
 -b, --basedir=name  Path to installation directory. All paths are usually
 resolved relative to this
 --big-tables        Old variable, which if set to 1, allows large result sets
 by saving all temporary sets to disk, avoiding 'table
 full' errors. No longer needed, as the server now handles
 this automatically. sql_big_tables is a synonym.
 --bind-address=name IP address to bind to.
 --binlog-annotate-row-events 
 Tells the master to annotate RBR events with the
 statement that caused these events
 (Defaults to on; use --skip-binlog-annotate-row-events to disable.)
 --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. One of: NONE, CRC32
 --binlog-commit-wait-count=# 
 If non-zero, binlog write will wait at most
 binlog_commit_wait_usec microseconds for at least this
 many commits to queue up for group commit to the binlog.
 This can reduce I/O on the binlog and provide increased
 opportunity for parallel apply on the slave, but too high
 a value will decrease commit throughput.
 --binlog-commit-wait-usec=# 
 Maximum time, in microseconds, to wait for more commits
 to queue up for binlog group commit. Only takes effect if
 the value of binlog_commit_wait_count is non-zero.
 --binlog-direct-non-transactional-updates 
 Causes updates to non-transactional engines using
 statement format to be written directly to binary log.
 Before using this option make sure that there are no
 dependencies between transactional and non-transactional
 tables such as in the statement INSERT INTO t_myisam
 SELECT * FROM t_innodb; otherwise, slaves may diverge
 from the master.
 --binlog-do-db=name Tells the master it should log updates for the specified
 database, and exclude all others not explicitly
 mentioned.
 --binlog-format=name 
 What form of binary logging the master will use: either
 ROW for row-based binary logging, STATEMENT for
 statement-based binary logging, or MIXED. MIXED is
 statement-based binary logging except for those
 statements where only row-based is correct: those which
 involve user-defined functions (i.e. UDFs) or the UUID()
 function; for those, row-based binary logging is
 automatically used.
 --binlog-ignore-db=name 
 Tells the master that updates to the given database
 should not be logged to the binary log.
 --binlog-optimize-thread-scheduling 
 Run fast part of group commit in a single thread, to
 optimize kernel thread scheduling. On by default. Disable
 to run each transaction in group commit in its own
 thread, which can be slower at very high concurrency.
 This option is mostly for testing one algorithm versus
 the other, and it should not normally be necessary to
 change it.
 (Defaults to on; use --skip-binlog-optimize-thread-scheduling 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-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.
 --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. One of: NEVER, AUTO, 
 ALWAYS
 --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)
 --deadlock-search-depth-long=# 
 Long search depth for the two-step deadlock detection
 --deadlock-search-depth-short=# 
 Short search depth for the two-step deadlock detection
 --deadlock-timeout-long=# 
 Long timeout for the two-step deadlock detection (in
 microseconds)
 --deadlock-timeout-short=# 
 Short timeout for the two-step deadlock detection (in
 microseconds)
 --default-regex-flags=name 
 Default flags for the regex library. Any combination of: 
 DOTALL, DUPNAMES, EXTENDED, EXTRA, MULTILINE, UNGREEDY
 --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 user-created temporary
 tables
 --default-week-format=# 
 The default week format used by WEEK() functions
 --delay-key-write[=name] 
 Specifies how MyISAM tables handles CREATE TABLE
 DELAY_KEY_WRITE. If set to ON, the default, any DELAY KEY
 WRITEs are honored. The key buffer is then flushed only
 when the table closes, speeding up writes. MyISAM tables
 should be automatically checked upon startup in this
 case, and --external locking should not be used, as it
 can lead to index corruption. If set to OFF, DELAY KEY
 WRITEs are ignored, while if set to ALL, all new opened
 tables are treated as if created with DELAY KEY WRITEs
 enabled.
 --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.
 --delayed-insert-timeout=# 
 How long a INSERT DELAYED thread should wait for INSERT
 statements before terminating
 --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
 --div-precision-increment=# 
 Precision of the result of '/' operator will be increased
 on that value
 --encrypt-binlog    Encrypt binary logs (including relay logs)
 --encrypt-tmp-disk-tables 
 Encrypt temporary on-disk tables (created as part of
 query execution)
 --encrypt-tmp-files Encrypt temporary files (created for filesort, binary log
 cache, etc)
 --enforce-storage-engine=name 
 Force the use of a storage engine for new tables
 --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)
 --expensive-subquery-limit=# 
 The maximum number of rows a subquery may examine in
 order to be executed during optimization and used for
 constant optimization
 --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.
 --extra-max-connections=# 
 The number of connections on extra-port
 --extra-port=#      Extra port number to use for tcp connections in a
 one-thread-per-connection manner. 0 means don't use
 another port
 --flashback         Setup the server to use flashback. This enables binary
 log in row mode and will enable extra logging for DDL's
 needed by flashback feature
 --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. Deprecated, use
 --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
 --getopt-prefix-matching 
 Recognize command-line options by their unambiguos
 prefixes.
 (Defaults to on; use --skip-getopt-prefix-matching to disable.)
 --group-concat-max-len=# 
 The maximum length of the result of function
 GROUP_CONCAT()
 --gtid-domain-id=#  Used with global transaction ID to identify logically
 independent replication streams. When events can
 propagate through multiple parallel paths (for example
 multiple masters), each independent source server must
 use a distinct domain_id. For simple tree-shaped
 replication topologies, it can be left at its default, 0.
 --gtid-ignore-duplicates 
 When set, different master connections in multi-source
 replication are allowed to receive and process event
 groups with the same GTID (when using GTID mode). Only
 one will be applied, any others will be ignored. Within a
 given replication domain, just the sequence number will
 be used to decide whether a given GTID has been already
 applied; this means it is the responsibility of the user
 to ensure that GTID sequence numbers are strictly
 increasing.
 --gtid-strict-mode  Enforce strict seq_no ordering of events in the binary
 log. Slave stops with an error if it encounters an event
 that would cause it to generate an out-of-order binlog if
 executed.
 -?, --help          Display this help and exit.
 --histogram-size=#  Number of bytes used for a histogram. If set to 0, no
 histograms are created by ANALYZE.
 --histogram-type=name 
 Specifies type of the histograms created by ANALYZE.
 Possible values are: SINGLE_PREC_HB - single precision
 height-balanced, DOUBLE_PREC_HB - double precision
 height-balanced.
 --host-cache-size=# How many host names should be cached to avoid resolving.
 (Automatically configured unless set explicitly)
 --ignore-builtin-innodb 
 Disable initialization of builtin InnoDB plugin
 --ignore-db-dirs=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
 (unless the user has SUPER privilege)
 --init-file=name    Read SQL commands from this file at startup
 --init-rpl-role=name 
 Set the replication role. One of: MASTER, SLAVE
 --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 joins
 --join-buffer-space-limit=# 
 The limit of the space for all join buffers used by a
 query
 --join-cache-level=# 
 Controls what join operations can be executed with join
 buffers. Odd numbers are used for plain join buffers
 while even numbers are used for linked buffers
 --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
 --key-cache-file-hash-size=# 
 Number of hash buckets for open and changed files.  If
 you have a lot of MyISAM files open you should increase
 this for faster flush of changes. A good value is
 probably 1/10 of number of possible open MyISAM files.
 --key-cache-segments=# 
 The number of segments in a 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.
 -L, --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-basename=name Basename for all log files and the .pid file. This sets
 all log file names at once (in 'datadir') and is normally
 the only option you need for specifying log files. Sets
 names for --log-bin, --log-bin-index, --relay-log,
 --relay-log-index, --general-log-file,
 --log-slow-query-log-file, --log-error-file, and
 --pid-file
 --log-bin[=name]    Log update queries in binary format. Optional argument
 should be name for binary log. If not given
 'datadir'/'log-basename'-bin or 'datadir'/mysql-bin will
 be used (the later if --log-basename is not specified).
 We strongly recommend to use either --log-basename or
 specify a filename to ensure that replication doesn't
 stop if the real hostname of the computer changes.
 --log-bin-compress  Whether the binary log can be compressed
 --log-bin-compress-min-len[=#] 
 Minimum length of sql statement(in statement mode) or
 record(in row mode)that can be compressed.
 --log-bin-index=name 
 File that holds the names for last 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-error[=name]  Log errors to file (instead of stdout).  If file name is
 not specified then 'datadir'/'log-basename'.err or the
 'pid-file' path with extension .err is used
 --log-isam[=name]   Log all MyISAM changes to file.
 --log-output=name   How logs should be written. Any combination of: NONE, 
 FILE, TABLE
 --log-queries-not-using-indexes 
 Log queries that are executed without benefit of any
 index to the slow log if it is open
 --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.
 (Defaults to on; use --skip-log-slow-admin-statements to disable.)
 --log-slow-filter=name 
 Log only certain types of queries. Any combination of: 
 admin, filesort, filesort_on_disk, full_join, full_scan, 
 query_cache, query_cache_miss, tmp_table, 
 tmp_table_on_disk
 --log-slow-rate-limit=# 
 Write to slow log every #th slow query. Set to 1 to log
 everything. Increase it to reduce the size of the slow or
 the performance impact of slow logging
 --log-slow-slave-statements 
 Log slow statements executed by slave thread to the slow
 log if it is open.
 (Defaults to on; use --skip-log-slow-slave-statements to disable.)
 --log-slow-verbosity=name 
 Verbosity level for the slow log. Any combination of: 
 innodb, query_plan, explain
 --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.
 -W, --log-warnings[=#] 
 Log some not critical warnings to the general log
 file.Value can be between 0 and 11. Higher values mean
 more verbosity
 --long-query-time=# Log all queries that have taken more than long_query_time
 seconds to execute to the slow query log file. The
 argument will be treated as a decimal value with
 microsecond precision
 --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. Defaults to master.info
 --master-retry-count=# 
 The number of tries the slave will make to connect to the
 master before giving up.
 --master-verify-checksum 
 Force checksum verification of logged events in the
 binary log before sending them to slaves or printing them
 in the output of SHOW BINLOG EVENTS
 --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-size=# Binary log will be rotated automatically when the size
 exceeds this value.
 --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
 --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-long-data-size=# 
 The maximum BLOB length to send to server from
 mysql_send_long_data API. Deprecated option; use
 max_allowed_packet instead.
 --max-prepared-stmt-count=# 
 Maximum number of prepared statements in the server
 --max-recursive-iterations[=#] 
 Maximum number of iterations when executing recursive
 queries
 --max-relay-log-size=# 
 relay log will be rotated automatically when the size
 exceeds this value.  If 0 at startup, it's set to
 max_binlog_size
 --max-seeks-for-key=# 
 Limit assumed max number of seeks when looking up rows
 based on a key
 --max-session-mem-used=# 
 Amount of memory a single user session is allowed to
 allocate. This limits the value of the session variable
 MEM_USED
 --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-statement-time=# 
 A query that has taken more than max_statement_time
 seconds will be aborted. The argument will be treated as
 a decimal value with microsecond precision. A value of 0
 (default) means no timeout
 --max-tmp-tables=#  Unused, will be removed.
 --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=# 
 Unused
 --metadata-locks-hash-instances=# 
 Unused
 --min-examined-row-limit=# 
 Don't write queries to slow log that examine fewer rows
 than that
 --mrr-buffer-size=# Size of buffer to use when using MRR with range access
 --multi-range-count=# 
 Ignored. Use mrr_buffer_size instead
 --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] 
 Specifies how corrupted tables should be automatically
 repaired. Any combination of: DEFAULT, BACKUP, FORCE, 
 QUICK, BACKUP_ALL, 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
 --mysql56-temporal-format 
 Use MySQL-5.6 (instead of MariaDB-5.3) format for TIME,
 DATETIME, TIMESTAMP columns.
 (Defaults to on; use --skip-mysql56-temporal-format to disable.)
 --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
 --old               Use compatible behavior from previous MariaDB version.
 See also --old-mode
 --old-alter-table   Use old, non-optimized alter table
 --old-mode=name     Used to emulate old behavior from earlier MariaDB or
 MySQL versions. Any combination of: 
 NO_DUP_KEY_WARNINGS_WITH_IGNORE, NO_PROGRESS_INFO, 
 ZERO_DATE_TIME_CAST
 --old-passwords     Use old password encryption method (needed for 4.0 and
 older clients)
 --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 or autoset then mysqld will reserve
 max_connections*5 or max_connections + table_cache*2
 (whichever is larger) number of file descriptors
 (Automatically configured unless set explicitly)
 --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-selectivity-sampling-limit=# 
 Controls number of record samples to check condition
 selectivity
 --optimizer-switch=name 
 Fine-tune the optimizer behavior. Takes a comma-separated
 list of option=value pairs, where value is on, off, or
 default, and options are: index_merge, index_merge_union,
 index_merge_sort_union, index_merge_intersection, 
 index_merge_sort_intersection, engine_condition_pushdown,
 index_condition_pushdown, derived_merge, 
 derived_with_keys, firstmatch, loosescan, materialization,
 in_to_exists, semijoin, partial_match_rowid_merge, 
 partial_match_table_scan, subquery_cache, mrr, 
 mrr_cost_based, mrr_sort_keys, outer_join_with_cache, 
 semijoin_with_cache, join_cache_incremental, 
 join_cache_hashed, join_cache_bka, 
 optimize_join_buffer_size, table_elimination, 
 extended_keys, exists_to_in, orderby_uses_equalities, 
 condition_pushdown_for_derived
 --optimizer-use-condition-selectivity=# 
 Controls selectivity of which conditions the optimizer
 takes into account to calculate cardinality of a partial
 join when it searches for the best execution plan
 Meaning: 1 - use selectivity of index backed range
 conditions to calculate the cardinality of a partial join
 if the last joined table is accessed by full table scan
 or an index scan, 2 - use selectivity of index backed
 range conditions to calculate the cardinality of a
 partial join in any case, 3 - additionally always use
 selectivity of range conditions that are not backed by
 any index to calculate the cardinality of a partial join,
 4 - use histograms to calculate selectivity of range
 conditions that are not backed by any index to calculate
 the cardinality of a partial join.5 - additionally use
 selectivity of certain non-range predicates calculated on
 record samples
 --performance-schema 
 Enable the performance schema.
 --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  Semicolon-separated list of plugins to load, where each
 plugin is specified as ether a plugin_name=library_file
 pair or only a library_file. If the latter case, all
 plugins from a given library_file will be loaded.
 --plugin-load-add=name 
 Optional semicolon-separated list of plugins to load.
 This option adds to the list specified by --plugin-load
 in an incremental way. It can be specified many times,
 adding more plugins every time.
 --plugin-maturity=name 
 The lowest desirable plugin maturity. Plugins less mature
 than that will not be installed or loaded. One of: 
 unknown, experimental, alpha, beta, gamma, stable
 -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=# 
 Number of statements about which profiling information is
 maintained. If set to 0, no profiles are stored. See SHOW
 PROFILES.
 --progress-report-time=# 
 Seconds between sending progress reports to the client
 for time-consuming statements. Set to 0 to disable
 progress reporting.
 --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-strip-comments 
 Strip all comments from a query before storing it in the
 query cache
 --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-binlog-speed-limit=# 
 Maximum speed(KB/s) to read binlog from master (0 = no
 limit)
 --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 
 The location and name to use for the file that keeps a
 list of the last relay logs
 --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-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-annotate-row-events 
 Tells the slave to write annotate rows events received
 from the master to its own binary log. Ignored if
 log_slave_updates is not set
 (Defaults to on; use --skip-replicate-annotate-row-events to disable.)
 --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-events-marked-for-skip=name 
 Whether the slave should replicate events that were
 created with @@skip_replication=1 on the master. Default
 REPLICATE (no events are skipped). Other values are
 FILTER_ON_SLAVE (events will be sent by the master but
 ignored by the slave) and FILTER_ON_MASTER (events marked
 with @@skip_replication=1 will be filtered on the master
 and never be sent to the slave).
 --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
 --rowid-merge-buff-size=# 
 The size of the buffers used [NOT] IN evaluation via
 partial matching
 --safe-mode         Skip some optimize stages (for testing). Deprecated.
 --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
 --session-track-schema 
 Track changes to the default schema.
 (Defaults to on; use --skip-session-track-schema to disable.)
 --session-track-state-change 
 Track changes to the session state.
 --session-track-system-variables=name 
 Track changes in registered system variables. For
 compatibility with MySQL defaults this variable should be
 set to "autocommit, character_set_client,
 character_set_connection, character_set_results,
 time_zone"
 --session-track-transaction-info=name 
 Track changes to the transaction attributes. OFF to
 disable; STATE to track just transaction state (Is there
 an active transaction? Does it have any data? etc.);
 CHARACTERISTICS to track transaction state and report all
 statements needed to start a transaction withthe same
 characteristics (isolation level, read only/read
 write,snapshot - but not any work done / data modified
 within the transaction).
 --show-slave-auth-info 
 Show user and password in SHOW SLAVE HOSTS on this
 master.
 --silent-startup    Don't print [Note] to the error log during startup.
 --skip-bdb          Deprecated option; Exist only for compatibility with old
 my.cnf files
 --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-show-database 
 Don't allow 'SHOW DATABASE' commands
 --skip-slave-start  If set, slave is not autostarted.
 --slave-compressed-protocol 
 Use compression on master/slave protocol
 --slave-ddl-exec-mode=name 
 How replication events should be executed. Legal values
 are STRICT and IDEMPOTENT (default). In IDEMPOTENT mode,
 replication will not stop for DDL operations that are
 idempotent. This means that CREATE TABLE is treated as
 CREATE TABLE OR REPLACE and DROP TABLE is treated as DROP
 TABLE IF EXISTS.
 --slave-domain-parallel-threads=# 
 Maximum number of parallel threads to use on slave for
 events in a single replication domain. When using
 multiple domains, this can be used to limit a single
 domain from grabbing all threads and thus stalling other
 domains. The default of 0 means to allow a domain to grab
 as many threads as it wants, up to the value of
 slave_parallel_threads.
 --slave-exec-mode=name 
 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. For example, in row based replication
 attempts to delete rows that doesn't exist will be
 ignored. 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 any
 master/slave connection before aborting the read
 --slave-parallel-max-queued=# 
 Limit on how much memory SQL threads should use per
 parallel replication thread when reading ahead in the
 relay log looking for opportunities for parallel
 replication. Only used when --slave-parallel-threads > 0.
 --slave-parallel-mode=name 
 Controls what transactions are applied in parallel when
 using --slave-parallel-threads. Possible values:
 "optimistic" tries to apply most transactional DML in
 parallel, and handles any conflicts with rollback and
 retry. "conservative" limits parallelism in an effort to
 avoid any conflicts. "aggressive" tries to maximise the
 parallelism, possibly at the cost of increased conflict
 rate. "minimal" only parallelizes the commit steps of
 transactions. "none" disables parallel apply completely.
 --slave-parallel-threads=# 
 If non-zero, number of threads to spawn to apply in
 parallel events on the slave that were group-committed on
 the master or were logged with GTID in different
 replication domains. Note that these threads are in
 addition to the IO and SQL threads, which are always
 created by a replication slave
 --slave-parallel-workers=# 
 Alias for slave_parallel_threads
 --slave-run-triggers-for-rbr=name 
 Modes for how triggers in row-base replication on slave
 side will be executed. Legal values are NO (default), YES
 and LOGGING. NO means that trigger for RBR will not be
 running on slave. YES and LOGGING means that triggers
 will be running on slave, if there was not triggers
 running on the master for the statement. LOGGING also
 means results of that the executed triggers work will be
 written to the binlog.
 --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
 (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. If the
 variable is empty, no conversions are allowed and it is
 expected that the types match exactly. Any combination
 of: ALL_LOSSY, ALL_NON_LOSSY
 --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
 --sql-mode=name     Sets the sql mode. Any combination of: REAL_AS_FLOAT, 
 PIPES_AS_CONCAT, ANSI_QUOTES, IGNORE_SPACE, 
 IGNORE_BAD_TABLE_OPTIONS, ONLY_FULL_GROUP_BY, 
 NO_UNSIGNED_SUBTRACTION, NO_DIR_IN_CREATE, POSTGRESQL, 
 ORACLE, MSSQL, DB2, MAXDB, NO_KEY_OPTIONS, 
 NO_TABLE_OPTIONS, NO_FIELD_OPTIONS, MYSQL323, MYSQL40, 
 ANSI, NO_AUTO_VALUE_ON_ZERO, NO_BACKSLASH_ESCAPES, 
 STRICT_TRANS_TABLES, STRICT_ALL_TABLES, NO_ZERO_IN_DATE, 
 NO_ZERO_DATE, ALLOW_INVALID_DATES, 
 ERROR_FOR_DIVISION_BY_ZERO, TRADITIONAL, 
 NO_AUTO_CREATE_USER, HIGH_NOT_PRECEDENCE, 
 NO_ENGINE_SUBSTITUTION, PAD_CHAR_TO_FULL_LENGTH
 --stack-trace       Print a symbolic stack trace on failure
 (Defaults to on; use --skip-stack-trace to disable.)
 --standard-compliant-cte 
 Allow only CTEs compliant to SQL standard
 (Defaults to on; use --skip-standard-compliant-cte to disable.)
 --stored-program-cache=# 
 The soft upper limit for number of cached stored routines
 for one connection.
 --strict-password-validation 
 When password validation plugins are enabled, reject
 passwords that cannot be validated (passwords specified
 as a hash)
 (Defaults to on; use --skip-strict-password-validation to disable.)
 -s, --symbolic-links 
 Enable symbolic link support.
 --sync-binlog=#     Synchronously flush binary log to disk after every #th
 event. 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-cache=#     Deprecated; use --table-open-cache instead.
 --table-definition-cache=# 
 The number of cached table definitions
 --table-open-cache=# 
 The number of cached open tables
 --table-open-cache-instances=# 
 Maximum number of table cache instances
 --tc-heuristic-recover=name 
 Decision to use in heuristic recover process. One of: OFF,
 COMMIT, ROLLBACK
 --thread-cache-size=# 
 How many threads we should keep in a cache for reuse.
 These are freed after 5 minutes of idle time
 --thread-pool-idle-timeout=# 
 Timeout in seconds for an idle thread in the thread
 pool.Worker thread will be shut down after timeout
 --thread-pool-max-threads=# 
 Maximum allowed number of worker threads in the thread
 pool
 --thread-pool-oversubscribe=# 
 How many additional active worker threads in a group are
 allowed.
 --thread-pool-prio-kickup-timer=# 
 The number of milliseconds before a dequeued low-priority
 statement is moved to the high-priority queue
 --thread-pool-priority=name 
 Threadpool priority. High priority connections usually
 start executing earlier than low priority.If priority set
 to 'auto', the the actual priority(low or high) is
 determined based on whether or not connection is inside
 transaction.
 --thread-pool-size=# 
 Number of thread groups in the pool. This parameter is
 roughly equivalent to maximum number of concurrently
 executing threads (threads in a waiting state do not
 count as executing).
 --thread-pool-stall-limit=# 
 Maximum query execution time in milliseconds,before an
 executing non-yielding thread is considered stalled.If a
 worker thread is stalled, additional worker thread may be
 created to handle remaining clients.
 --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-disk-table-size=# 
 Max size for data for an internal temporary on-disk
 MyISAM or Aria table.
 --tmp-memory-table-size=# 
 If an internal in-memory temporary table exceeds this
 size, MariaDB will automatically convert it to an on-disk
 MyISAM or Aria table. Same as tmp_table_size.
 --tmp-table-size=#  Alias for tmp_memory_table_size. If an internal in-memory
 temporary table exceeds this size, MariaDB will
 automatically convert it to an on-disk MyISAM or Aria
 table.
 -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. One of: 
 READ-UNCOMMITTED, READ-COMMITTED, REPEATABLE-READ, 
 SERIALIZABLE
 --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)
 --use-stat-tables=name 
 Specifies how to use system statistics tables. One of: 
 NEVER, COMPLEMENTARY, PREFERABLY
 -u, --user=name     Run mysqld daemon as user.
 --userstat          Enables statistics gathering for USER_STATISTICS,
 CLIENT_STATISTICS, INDEX_STATISTICS and TABLE_STATISTICS
 tables in the INFORMATION_SCHEMA
 -v, --verbose       Used with --help option for detailed help.
 -V, --version[=name] 
 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)
allow-suspicious-udfs FALSE
auto-increment-increment 1
auto-increment-offset 1
autocommit TRUE
automatic-sp-privileges TRUE
back-log 80
big-tables FALSE
bind-address (No default value)
binlog-annotate-row-events TRUE
binlog-cache-size 32768
binlog-checksum CRC32
binlog-commit-wait-count 0
binlog-commit-wait-usec 100000
binlog-direct-non-transactional-updates FALSE
binlog-format MIXED
binlog-optimize-thread-scheduling TRUE
binlog-row-event-max-size 8192
binlog-row-image FULL
binlog-stmt-cache-size 32768
bulk-insert-buffer-size 8388608
character-set-client-handshake TRUE
character-set-filesystem binary
character-sets-dir MYSQL_CHARSETSDIR/
chroot (No default value)
completion-type NO_CHAIN
concurrent-insert AUTO
console TRUE
date-format %Y-%m-%d
datetime-format %Y-%m-%d %H:%i:%s
deadlock-search-depth-long 15
deadlock-search-depth-short 4
deadlock-timeout-long 50000000
deadlock-timeout-short 10000
default-regex-flags 
default-storage-engine myisam
default-time-zone (No default value)
default-tmp-storage-engine (No default value)
default-week-format 0
delay-key-write ON
delayed-insert-limit 100
delayed-insert-timeout 300
delayed-queue-size 1000
div-precision-increment 4
encrypt-binlog FALSE
encrypt-tmp-disk-tables FALSE
encrypt-tmp-files FALSE
enforce-storage-engine (No default value)
event-scheduler OFF
expensive-subquery-limit 100
expire-logs-days 0
explicit-defaults-for-timestamp FALSE
external-locking FALSE
extra-max-connections 1
extra-port 0
flashback 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
getopt-prefix-matching FALSE
group-concat-max-len 1048576
gtid-domain-id 0
gtid-ignore-duplicates FALSE
gtid-strict-mode FALSE
help TRUE
histogram-size 0
histogram-type SINGLE_PREC_HB
host-cache-size 279
ignore-builtin-innodb FALSE
ignore-db-dirs 
init-connect 
init-file (No default value)
init-rpl-role MASTER
init-slave 
interactive-timeout 28800
join-buffer-size 262144
join-buffer-space-limit 2097152
join-cache-level 2
keep-files-on-create FALSE
key-buffer-size 134217728
key-cache-age-threshold 300
key-cache-block-size 1024
key-cache-division-limit 100
key-cache-file-hash-size 512
key-cache-segments 0
large-pages FALSE
lc-messages en_US
lc-messages-dir MYSQL_SHAREDIR/
lc-time-names en_US
local-infile TRUE
lock-wait-timeout 86400
log-bin (No default value)
log-bin-compress FALSE
log-bin-compress-min-len 256
log-bin-index (No default value)
log-bin-trust-function-creators FALSE
log-error 
log-isam myisam.log
log-output FILE
log-queries-not-using-indexes FALSE
log-short-format FALSE
log-slave-updates FALSE
log-slow-admin-statements TRUE
log-slow-filter admin,filesort,filesort_on_disk,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk
log-slow-rate-limit 1
log-slow-slave-statements TRUE
log-slow-verbosity 
log-tc tc.log
log-warnings 2
long-query-time 10
low-priority-updates FALSE
lower-case-table-names 1
master-info-file master.info
master-retry-count 86400
master-verify-checksum FALSE
max-allowed-packet 16777216
max-binlog-cache-size 18446744073709547520
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-long-data-size 16777216
max-prepared-stmt-count 16382
max-recursive-iterations 18446744073709551615
max-relay-log-size 1073741824
max-seeks-for-key 18446744073709551615
max-session-mem-used 9223372036854775807
max-sort-length 1024
max-sp-recursion-depth 0
max-statement-time 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
mrr-buffer-size 262144
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 BACKUP,QUICK
myisam-repair-threads 1
myisam-sort-buffer-size 134216704
myisam-stats-method NULLS_UNEQUAL
myisam-use-mmap FALSE
mysql56-temporal-format TRUE
net-buffer-length 16384
net-read-timeout 30
net-retry-count 10
net-write-timeout 60
old FALSE
old-alter-table FALSE
old-mode 
old-passwords FALSE
old-style-user-limits FALSE
optimizer-prune-level 1
optimizer-search-depth 62
optimizer-selectivity-sampling-limit 100
optimizer-switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on
optimizer-use-condition-selectivity 1
performance-schema FALSE
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 188
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
plugin-maturity unknown
port 3306
port-open-timeout 0
preload-buffer-size 32768
profiling-history-size 15
progress-report-time 5
protocol-version 10
query-alloc-block-size 16384
query-cache-limit 1048576
query-cache-min-res-unit 4096
query-cache-size 1048576
query-cache-strip-comments FALSE
query-cache-type OFF
query-cache-wlock-invalidate FALSE
query-prealloc-size 24576
range-alloc-block-size 4096
read-binlog-speed-limit 0
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-purge TRUE
relay-log-recovery FALSE
relay-log-space-limit 0
replicate-annotate-row-events TRUE
replicate-events-marked-for-skip REPLICATE
replicate-same-server-id FALSE
report-host (No default value)
report-password (No default value)
report-port 0
report-user (No default value)
rowid-merge-buff-size 8388608
safe-user-create FALSE
secure-auth TRUE
secure-file-priv (No default value)
server-id 1
session-track-schema TRUE
session-track-state-change FALSE
session-track-system-variables 
session-track-transaction-info OFF
show-slave-auth-info FALSE
silent-startup FALSE
skip-grant-tables TRUE
skip-name-resolve FALSE
skip-networking FALSE
skip-show-database FALSE
skip-slave-start FALSE
slave-compressed-protocol FALSE
slave-ddl-exec-mode IDEMPOTENT
slave-domain-parallel-threads 0
slave-exec-mode STRICT
slave-max-allowed-packet 1073741824
slave-net-timeout 60
slave-parallel-max-queued 131072
slave-parallel-mode conservative
slave-parallel-threads 0
slave-parallel-workers 0
slave-run-triggers-for-rbr NO
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 2097152
sql-mode STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
stack-trace TRUE
standard-compliant-cte TRUE
stored-program-cache 256
strict-password-validation TRUE
symbolic-links FALSE
sync-binlog 0
sync-frm FALSE
sync-master-info 10000
sync-relay-log 10000
sync-relay-log-info 10000
sysdate-is-now FALSE
table-cache 431
table-definition-cache 400
table-open-cache 431
table-open-cache-instances 8
tc-heuristic-recover OFF
thread-cache-size 151
thread-pool-idle-timeout 60
thread-pool-max-threads 65536
thread-pool-oversubscribe 3
thread-pool-prio-kickup-timer 1000
thread-pool-priority auto
thread-pool-stall-limit 500
thread-stack 299008
time-format %H:%i:%s
timed-mutexes FALSE
tmp-disk-table-size 18446744073709551615
tmp-memory-table-size 16777216
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
use-stat-tables NEVER
userstat FALSE
verbose TRUE
wait-timeout 28800

To see what values a running MySQL server is using, type
'mysqladmin variables' instead of 'mysqld --verbose --help'.