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 servers 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.
o create db_name
Create a new database named db_name.
Tell the server to write debug information to the error log.
This includes information about the Event Scheduler. See Section 19.4.5, Event Scheduler Status.
o drop db_name
Delete the database named db_name and all its tables.
Display the server status variables and their values.
Flush all information in the host cache.
Flush all logs.
Reload the grant tables (same as reload).
Clear status variables.
Flush all tables.
Flush the thread cache.
o kill id,id,...
Kill server threads. If multiple thread ID values are given, there must be no spaces in the list.
o 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 220.127.116.11, Password Hashing in MySQL.)
o 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"
As of MySQL 5.5.3, the new password can be omitted following the password command. In this case, mysqladmin prompts for the password value, which enables you to avoid specifying the password on the command line. Omitting the password value should be done only if password is the final command on the mysqladmin command line. Otherwise, the next argument is taken as the password.
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.
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.
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 18.104.22.168, SHOW PROCESSLIST Syntax.)
Reload the grant tables.
Flush all tables and close and open log files.
Stop the server.
Start replication on a slave server.
Display a short server status message.
Stop replication on a slave server.
Display the server system variables and their values.
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:
The number of seconds the MySQL server has been running.
The number of active threads (clients).
The number of questions (queries) from clients since the server was started.
o Slow queries
The number of queries that have taken more than long_query_time seconds. See Section 5.2.5, The Slow Query Log.
The number of tables the server has opened.
o Flush tables
The number of flush-*, refresh, and reload commands the server has executed.
o Open tables
The number of tables that currently are open.
o Memory in use
The amount of memory allocated directly by mysqld. This value is displayed only when MySQL has been compiled with safemalloc, which is available only before MySQL 5.5.6.
o Maximum memory used
The maximum amount of memory allocated directly by mysqld. This value is displayed only when MySQL has been compiled with safemalloc, which is available only before MySQL 5.5.6.
If you execute mysqladmin shutdown when connecting to a local server using a Unix socket file, mysqladmin waits until the servers 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 22.214.171.124, Command-Line Options that Affect Option-File Handling.
o --help, -?
Display a help message and exit.
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. It is not available in standard MySQL Server 5.5 releases.
The directory where character sets are installed. See Section 10.5, Character Set Configuration.
o --compress, -C
Compress all information sent between the client and the server if both support compression.
o --count=N, -c N
The number of iterations to make for repeated command execution if the --sleep option is given.
o --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.
Print some debugging information when the program exits.
Print debugging information and memory and CPU usage statistics when the program exits.
The client-side authentication plugin to use. See Section 6.3.6, Pluggable Authentication.
This option was added in MySQL 5.5.9.
Use charset_name as the default character set. See Section 10.5, Character Set Configuration.
Enable the mysql_clear_password cleartext authentication plugin. (See Section 126.96.36.199, The Cleartext Client-Side Authentication Plugin.) This option was added in MySQL 5.5.27.
o --force, -f
Do not ask for confirmation for the drop db_name command. With multiple commands, continue even if an error occurs.
o --host=host_name, -h host_name
Connect to the MySQL server on the given host.
o --no-beep, -b
Suppress the warning beep that is emitted by default for errors such as a failure to connect to the server.
o --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 188.8.131.52, End-User Guidelines for Password Security. You can use an option file to avoid giving the password on the command line.
o --pipe, -W
On Windows, connect to the server using a named pipe. This option applies only if the server supports named-pipe connections.
The directory in which to look for plugins. It may be necessary to specify this option if the --default-auth option is used to specify an authentication plugin but mysqladmin does not find it. See Section 6.3.6, Pluggable Authentication.
This option was added in MySQL 5.5.9.
o --port=port_num, -P port_num
The TCP/IP port number to use for the connection.
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.
o --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.
o --silent, -s
Exit silently if a connection to the server cannot be established.
o --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.
o --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.
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 184.108.40.206, SSL Command Options.
o --user=user_name, -u user_name
The MySQL user name to use when connecting to the server.
o --verbose, -v
Verbose mode. Print more information about what the program does.
o --version, -V
Display version information and exit.
o --vertical, -E
Print output vertically. This is similar to --relative, but prints output vertically.
o --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 was removed in MySQL 5.5.3. syntax:
The maximum number of seconds before connection timeout. The default value is 43200 (12 hours).
The maximum number of seconds to wait for server shutdown. The default value is 3600 (1 hour).
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|MySQL 5.5||BMYSQLADMINR (1)||03/22/2013|