MYSQLADMIN

mysqladmin − client for administering a MySQL server

mysqladmin [options] command [command−options] [command [command−options]] ...

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.

Beginning with MySQL 5.1.12, this includes information about the Event Scheduler. See Section 19.4.5, “Event Scheduler Status”.

• drop db_name

Delete the database named db_name and all its tables.

• extended−status

Display the server status variables and their values.

• flush−hosts

Flush all information in the host cache.

• flush−logs

Flush all logs.

• flush−privileges

Reload the grant tables (same as reload).

• flush−status

Clear status variables.

• flush−tables

Flush all tables.

• flush−threads

Flush the thread cache.

• 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−4.1) password−hashing format. (See Section 6.1.2.4, “Password Hashing in MySQL”.)

• 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 quotation marks. On Windows, be sure to use double quotation marks rather than single quotation marks; single quotation marks 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 available. 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. (See Section 13.7.5.31, “SHOW PROCESSLIST Syntax”.)

• reload

Reload the grant tables.

• refresh

Flush all tables and close and open log files.

• shutdown

Stop the server.

• start−slave

Start replication on a slave server.

• status

Display a short server status message.

• 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 MySQL 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. See Section 5.2.5, “The Slow Query Log”.

• 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 MySQL 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 MySQL 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] groups of an option file. mysqladmin also supports the options for processing option files described at Section 4.2.3.4, “Command-Line Options that Affect Option-File Handling”.

• −−help, −?

Display a help message and exit.

• −−bind−address=ip_address

On a computer having multiple network interfaces, this option can be used to select which interface is employed when connecting to the MySQL server.

This option is supported only in the version of mysqladmin that is supplied with MySQL Cluster, beginning with MySQL Cluster NDB 6.3.4. It is not available in standard MySQL 5.1 releases.

• −−character−sets−dir=path

The directory where character sets are installed. See Section 10.5, “Character Set Configuration”.

• −−compress, −C

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

• −−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

Print some debugging information when the program exits. This option was added in MySQL 5.1.21.

• −−debug−info

Print debugging information and memory and CPU usage statistics when the program exits. This option was added in MySQL 5.1.14.

• −−default−character−set=charset_name

Use charset_name as the default character set. See Section 10.5, “Character Set Configuration”.

• −−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 MySQL server on the given host.

• −−no−beep, −b

Suppress the warning beep that is emitted by default for errors such as a failure to connect to the server. This option was added in MySQL 5.1.17.

• −−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. See Section 6.1.2.1, “End-User Guidelines for Password Security”. You can use an option file to avoid giving the password on the command line.

• −−pipe, −W

On Windows, connect to the server using 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.

• −−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. For details on the permissible values, see Section 4.2.2, “Connecting to the MySQL Server”.

• −−relative, −r

Show the difference between the current and previous values when used with the −−sleep option. This option works only with the extended−status command.

• −−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*

Options that begin with −−ssl specify whether to connect to the server using SSL and indicate where to find SSL keys and certificates. See Section 6.3.6.4, “SSL Command Options”.

• −−user=user_name, −u user_name

The MySQL 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 The −−set−variable format is deprecated and is removed in MySQL 5.5.

• 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).

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For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/.

Oracle Corporation (http://dev.mysql.com/).