mysqladmin
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
-c, |
Number of iterations to make. This works with -i ( |
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Check memory and open file usage at exit. |
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Print some debug info at exit. |
-f, |
Don't ask for confirmation on drop database; with multiple commands, continue even if an error occurs. |
-C, |
Use compression in server/client protocol. |
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Directory for character set files. |
|
Set the default character set. |
-?, |
Display this help and exit. |
-h, |
Connect to host. |
-b, |
Turn off beep on error. |
-p, |
Password to use when connecting to server. If password is not given it's asked from the tty. |
-P, |
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). |
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The protocol to use for connection (tcp, socket, pipe, memory). |
-r, |
Show difference between current and previous values when used with -i. Currently only works with extended-status. |
-O, |
Change the value of a variable. Please note that this option is deprecated; you can set variables directly with |
-s, |
Silently exit if one can't connect to server. |
-S, |
The socket file to use for connection. |
-i, |
Execute commands repeatedly with a sleep between. |
|
Enable SSL for connection (automatically enabled with other flags).Disable with ' |
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CA file in PEM format (check OpenSSL docs, implies |
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CA directory (check OpenSSL docs, implies |
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X509 cert in PEM format (implies |
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SSL cipher to use (implies |
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X509 key in PEM format (implies |
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Verify server's "Common Name" in its cert against hostname used when connecting. This option is disabled by default. |
-u, |
User for login if not current user. |
-v, |
Write more information. |
-V, |
Output version information and exit. |
-E, |
Print output vertically. Is similar to ' |
-w, |
Wait and retry if connection is down. |
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|
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mysqladmin Variables (--variable-name=value
--variable-name=value {FALSE|TRUE}
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:
mysqladminclientclient-serverclient-mariadb
The following options may be given as the first argument:
|
Print the program argument list and exit. |
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Don't read default options from any option file. |
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Only read default options from the given file #. |
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Read this file after the global files are read. |
mysqladmin Commands
Command is one or more of: (Commands may be shortened)
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 killcommand:
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