mysqladmin

Synopsis

mysqladmin [options] command [command-arg] [command [command-arg]] ...

Description

mysqladmin is a client for performing administrative operations. You can use it to check the server´s configuration and current status, to create and drop databases, and more.

Invoke mysqladmin like this:

shell> mysqladmin [options] command [command-arg] [command [command-arg]] ...

mysqladmin supports the following commands. Some of the commands take an argument following the command name.

• create db_name

  Create a new database named db_name.

• debug

  Tell the server to write debug information to the error log.

  This also includes information about the Event Scheduler.

• drop db_name

  Delete the database named db_name and all its tables.

• extended-status

  Display the server status variables and their values.

• flush-all-statistics

  Flush all statistics tables.

• flush-all-status

  Flush all status and statistics.

• flush-binary-log

  Flush the binary log.

• flush-client-statistics

  Flush client statistics.

• flush-engine-log

  Flush engine log.

• flush-error-log

  Flush error log.

• flush-general-log

  Flush general query log.

• flush-hosts

  Flush all information in the host cache.

• flush-index-statistics

  Flush index statistics.

• flush-logs

  Flush all logs.

• flush-privileges

  Reload the grant tables (same as reload).

• flush-relay-log

  Flush relay log.

• flush-slow-log

  Flush slow query log.

• flush-status

  Clear status variables.

• flush-table-statistics

  Flush table statistics.

• flush-tables

  Flush all tables.

• flush-threads

  Flush the thread cache.

• flush-user-resources

  Flush user resources.

• kill id,id,...

  Kill server threads. If multiple thread ID values are given, there must be no spaces in the list.

• old-password new-password

  This is like the password command but stores the password using the old (pre MySQL 4.1) password-hashing format.

• password new-password

  Set a new password. This changes the password to new-password for the account that you use with mysqladmin for connecting to the server. Thus, the next time you invoke mysqladmin (or any other client program) using the same account, you will need to specify the new password.

  If the new-password value contains spaces or other characters that are special to your command interpreter, you need to enclose it within quotes. On Windows, be sure to use double quotes rather than single quotes; single quotes are not stripped from the password, but rather are interpreted as part of the password. For example:

  shell> mysqladmin password "my new password"

  Caution
  Do not use this command used if the server was started with the --skip-grant-tables option. No password change will be applied. This is true even if you precede the password command with flush-privileges on the same command line to re-enable the grant tables because the flush operation occurs after you connect. However, you can use mysqladmin flush-privileges to re-enable the grant table and then use a separate mysqladmin password command to change the password.

• ping

  Check whether the server is alive. The return status from mysqladmin is 0 if the server is running, 1 if it is not. This is 0 even in case of an error such as Access denied, because this means that the server is running but refused the connection, which is different from the server not running.

• processlist

  Show a list of active server threads. This is like the output of the SHOW PROCESSLIST statement. If the --verbose option is given, the output is like that of SHOW FULL PROCESSLIST.

• reload

  Reload the grant tables.

• refresh

  Flush all tables and close and open log files.

• shutdown

  Stop the server.

• start-all-slaves

  Start all slaves.

• start-slave

  Start replication on a slave server.

• status

  Display a short server status message.

• stop-all-slaves

  Stop all slaves.

• stop-slave

  Stop replication on a slave server.

• variables

  Display the server system variables and their values.

• version

  Display version information from the server.

All commands can be shortened to any unique prefix. For example:

shell> mysqladmin proc stat
+----+-------+-----------+----+---------+------+-------+------------------+
| Id | User  | Host      | db | Command | Time | State | Info             |
+----+-------+-----------+----+---------+------+-------+------------------+
| 51 | monty | localhost |    | Query   | 0    |       | show processlist |
+----+-------+-----------+----+---------+------+-------+------------------+
Uptime: 1473624  Threads: 1  Questions: 39487
Slow queries: 0  Opens: 541  Flush tables: 1
Open tables: 19  Queries per second avg: 0.0268

The mysqladmin status command result displays the following values:

• Uptime

  The number of seconds the MariaDB server has been running.

• Threads

  The number of active threads (clients).

• Questions

  The number of questions (queries) from clients since the server was started.

• Slow queries

  The number of queries that have taken more than long_query_time seconds.

• Opens

  The number of tables the server has opened.

• Flush tables

  The number of flush-*, refresh, and reload commands the server has executed.

• Open tables

  The number of tables that currently are open.

• Memory in use

  The amount of memory allocated directly by mysqld. This value is displayed only when MariaDB has been compiled with --with-debug=full.

• Maximum memory used

  The maximum amount of memory allocated directly by mysqld. This value is displayed only when MariaDB has been compiled with --with-debug=full.

If you execute mysqladmin shutdown when connecting to a local server using a Unix socket file, mysqladmin waits until the server´s process ID file has been removed, to ensure that the server has stopped properly.

mysqladmin supports the following options, which can be specified on the command line or in the [mysqladmin] and [client] option file groups.

• --help, -?

  Display help and exit.

• --character-sets-dir=path

  The directory where character sets are installed.

• --compress, -C

  Compress all information sent between the client and the server if both support compression.

• --connect-timeout=timeout

  Equivalent to --connect_timeout, see the end of this section.

• --count=N, -c N

  The number of iterations to make for repeated command execution if the --sleep option is given.

• --debug[=debug_options], -# [debug_options]

  Write a debugging log. A typical debug_options string is ´d:t:o,file_name´. The default is ´d:t:o,/tmp/mysqladmin.trace´.

• --debug-check

  Check memory and open file usage at exit..

• --debug-info

  Print debugging information and memory and CPU usage statistics when the program exits.

• --default-auth

  Default authentication client-side plugin to use.

• --default-character-set=charset_name

  Use charset_name as the default character set.

• --defaults-extra-file=filename

  Set filename as the file to read default options from after the global defaults files has been read. Must be given as first option.

• --defaults-file=filename

  Set filename as the file to read default options from, override global defaults files. Must be given as first option.

• --force, -f

  Do not ask for confirmation for the drop db_name command. With multiple commands, continue even if an error occurs.

• --host=host_name, -h host_name

  Connect to the MariaDB server on the given host.

• --no-defaults

  Do not read default options from any option file. This must be given as the first argument.

• --password[=password], -p[password]

  The password to use when connecting to the server. If you use the short option form (-p), you cannot have a space between the option and the password. If you omit the password value following the --password or -p option on the command line, mysqladmin prompts for one.

  Specifying a password on the command line should be considered insecure.

• --pipe, -W

  On Windows, connect to the server via a named pipe. This option applies only if the server supports named-pipe connections.

• --port=port_num, -P port_num

  The TCP/IP port number to use for the connection or 0 for default to,  in order of preference, my.cnf, $MYSQL_TCP_PORT, /etc/services, built-in default (3306).

• --print-defaults

  Print the program argument list and exit. This must be given as the first argument.

• --protocol={TCP|SOCKET|PIPE|MEMORY}

  The connection protocol to use for connecting to the server. It is useful when the other connection parameters normally would cause a protocol to be used other than the one you want.

• --relative, -r

  Show the difference between the current and previous values when used with the --sleep option. Currently, this option works only with the extended-status command.

• --shutdown-timeouttimeout

  Equivalent of --shutdown_timeout, see the end of this section.

• --silent, -s

  Exit silently if a connection to the server cannot be established.

• --sleep=delay, -i delay

  Execute commands repeatedly, sleeping for delay seconds in between. The --count option determines the number of iterations. If --count is not given, mysqladmin executes commands indefinitely until interrupted.

• --socket=path, -S path

  For connections to localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use.

• --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 (check OpenSSL docs, implies --ssl).

• --ssl-cipher=name

  SSL cipher to use (check OpenSSL docs, implies --ssl).

• --ssl-key=name

  X509 key in PEM format (check OpenSSL docs, implies --ssl).

• --ssl-crl=name

  Certificate revocation list (check OpenSSL docs, implies --ssl).

• --ssl-crlpath=name

  Certificate revocation list path (check OpenSSL docs, 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.

• --user=user_name, -u user_name

  The MariaDB user name to use when connecting to the server.

• --verbose, -v

  Verbose mode. Print more information about what the program does.

• --version, -V

  Display version information and exit.

• --vertical, -E

  Print output vertically. This is similar to --relative, but prints output vertically.

• --wait[=count], -w[count]

  If the connection cannot be established, wait and retry instead of aborting. If a count value is given, it indicates the number of times to retry. The default is one time.

You can also set the following variables by using --var_name=value

• connect_timeout

  The maximum number of seconds before connection timeout. The default value is 43200 (12 hours).

• shutdown_timeout

  The maximum number of seconds to wait for server shutdown. The default value is 3600 (1 hour).

Copyright

Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc., 2010-2015 MariaDB Foundation

This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.

This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA or see http://www.gnu.org/licenses/.

See Also

For more information, please refer to the MariaDB Knowledge Base, available online at https://mariadb.com/kb/

Author

MariaDB Foundation (http://www.mariadb.org/).

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