MariaDB_mysqladmin
10785 ワード
mysqladmin
via: https://mariadb.com/kb/en/mysqladmin/
Monitor what the MySQL clients are doing (processlist)
Get usage statistics and variables from the MariaDB/MySQL server
Create/drop databases
Flush (reset) logs, statistics and tables
Kill running queries.
Stop the server (shutdown)
Start/stop slaves
Check if the server is alive (ping)
Usage
mysqladmin Options
Option Description
via: https://mariadb.com/kb/en/mysqladmin/
mysqladmin is an administration program for the mysqld daemon. It can be used to: Monitor what the MySQL clients are doing (processlist)
Get usage statistics and variables from the MariaDB/MySQL server
Create/drop databases
Flush (reset) logs, statistics and tables
Kill running queries.
Stop the server (shutdown)
Start/stop slaves
Check if the server is alive (ping)
Usage
mysqladmin [OPTIONS] command command....mysqladmin Options
Option Description
-c, -- count=#
Number of iterations to make. This works with -i ( -- sleep) only. -- debug-check
Check memory and open file usage at exit. -- debug-info
Print some debug info at exit. -f, -- force
Don't ask for confirmation on drop database; with multiple commands, continue even if an error occurs. -C, -- compress
Use compression in server/client protocol. -- character-sets-dir=name
Directory for character set files. -- default-character-set=name
Set the default character set. -?, -- help
Display this help and exit. -h, -- host=name
Connect to host. -b, -- no-beep
Turn off beep on error. -p, -- password[=name]
Password to use when connecting to server. If password is not given it's asked from the tty. -P, -- port=#
Port number to use for connection or 0 for default to, in order of preference, my.cnf, $MYSQL_TCP_PORT,/etc/services, built-in default (3306). -- protocol=name
The protocol to use for connection (tcp, socket, pipe, memory). -r, -- relative
Show difference between current and previous values when used with -i. Currently only works with extended-status. -O, -- set-variable=name
Change the value of a variable. Please note that this option is deprecated; you can set variables directly with -- variable-name=value. -s, -- silent
Silently exit if one can't connect to server. -S, -- socket=name
The socket file to use for connection. -i, -- sleep=#
Execute commands repeatedly with a sleep between. -- ssl
Enable SSL for connection (automatically enabled with other flags).Disable with ' -- skip-ssl'. -- ssl-ca=name
CA file in PEM format (check OpenSSL docs, implies -- ssl). -- ssl-capath=name
CA directory (check OpenSSL docs, implies -- ssl). -- ssl-cert=name
X509 cert in PEM format (implies -- ssl). -- ssl-cipher=name
SSL cipher to use (implies -- ssl). -- ssl-key=name
X509 key in PEM format (implies -- ssl). -- ssl-verify-server-cert
Verify server's "Common Name"in its cert against hostname used when connecting. This option is disabled by default. -u, -- user=name
User for login if not current user. -v, -- verbose
Write more information. -V, -- version
Output version information and exit. -E, -- vertical
Print output vertically. Is similar to ' -- relative', but prints output vertically. -w, -- wait[=#]
Wait and retry if connection is down. -- connect_timeout=#
-- shutdown_timeout=#
mysqladmin Variables ( -- variable-name=value) {FALSE|TRUE} Variables and boolean options Value (after reading options) count 0 debug-check FALSE debug-info FALSE force FALSE compress FALSE character-sets-dir
(No default value) default-character-set
(No default value) host
(No default value) no-beep FALSE port 3306 relative FALSE socket /var/run/mysqld/mysqld.sock sleep 0 ssl FALSE ssl-ca
(No default value) ssl-capath
(No default value) ssl-cert
(No default value) ssl-cipher
(No default value) ssl-key
(No default value) ssl-verify-server-cert FALSE user
(No default value) verbose FALSE vertical FALSE connect_timeout 43200 shutdown_timeout 3600
mysqladmin Default Options
Default options are read from the following files in the given order: /etc/my.cnf /etc/mysql/my.cnf /usr/etc/my.cnf ~/.my.cnf
The following groups are read: mysqladmin client client-server client-mariadb
The following options may be given as the first argument:
Option Description -- 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.
mysqladmin Commands
Command is one or more of: (Commands may be shortened)
Command Description create databasename
Create a new database debug
Instruct server to write debug information to log drop databasename
Delete a database and all its tables extended-status
Gives an extended status message from the server flush-all-statistics
Flush all statistics tables flush-all-status
Flush status and statistics flush-client-statistics
Flush client statistics flush-hosts
Flush all cached hosts flush-index-statistics
Flush index statistics flush-logs
Flush all logs flush-privileges
Reload grant tables (same as reload) flush-slow-log
Flush slow query log flush-status
Clear status variables flush-table-statistics
Clear table statistics flush-tables
Flush all tables flush-threads
Flush the thread cache flush-user-statistics
Flush user statistics kill id,id,...
Kill mysql threads password new-password
Change old password to new-password, MySQL 4.1 hashing. old-password new-password
Change old password to new-password in old format. ping
Check if mysqld is alive processlist
Show list of active threads in server reload
Reload grant tables refresh
Flush all tables and close and open logfiles shutdown
Take server down; see also SHUTDOWN status
Gives a short status message from the server start-slave
Start slave stop-slave
Stop slave variables
Prints variables available version
Get version info from server
Typical example usage
Quick check of what the server is doing: shell> mysqladmin status
Uptime: 8023 Threads: 1 Questions: 14 Slow queries: 0 Opens: 15 Flush tables: 1 Open tables: 8 Queries per second avg: 0.1
shell> mysqladmin processlist
+----+-------+-----------+----+---------+------+-------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+-------+-----------+----+---------+------+-------+------------------+
....
+----+-------+-----------+----+---------+------+-------+------------------+
More extensive information of what is happening 'just now' changing (great for troubleshooting a slow server): shell> mysqladmin --relative --sleep=1 extended-status | grep -v " 0 "
Check the variables for a running server: shell> mysqladmin variables | grep datadir
| datadir | /my/data/ |
Other ways to stop mysqld (unix)
If you get the error: mysqladmin: shutdown failed; error: 'Access denied; you need (at least one of) the SHUTDOWN privilege(s) for this operation'
It means that you didn't use mysqladmin with a user that has the SUPER or SHUTDOWN privilege.
If you don't know the user password, you can still take the mysqld process down with a system kill command: kill -SIGTERM pid-of-mysqld-process
The above is identical to mysqladmin shutdown .
On windows you should use: NET STOP MySQL
See also
mytop , a 'top' like program for MariaDB/MySQL that allows you to see what the server is doing. A mytop optimized for MariaDB is included in MariaDB 5.3