NAME
mysqladmin - client for administering a MySQL server
SYNOPSIS
mysqladmin [options] command [command-options] [command
[command-options]]
...
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.
o create db_name
Create a new database named db_name.
o 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".
o drop db_name
Delete the database named db_name and all its tables.
o extended-status
Display the server status variables and their values.
o flush-hosts
Flush all information in the host cache.
o flush-logs
Flush all logs.
o flush-privileges
Reload the grant tables (same as reload).
o flush-status
Clear status variables.
o flush-tables
Flush all tables.
o flush-threads
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 5.3.2.3,
"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"
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.
o 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.
o 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 12.4.5.31, "SHOW PROCESSLIST Syntax".)
o reload
Reload the grant tables.
o refresh
Flush all tables and close and open log files.
o shutdown
Stop the server.
o start-slave
Start replication on a slave server.
o status
Display a short server status message.
o stop-slave
Stop replication on a slave server.
o variables
Display the server system variables and their values.
o 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:
o Uptime
The number of seconds the MySQL server has been running.
o Threads
The number of active threads (clients).
o Questions
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".
o Opens
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 --with-debug=full.
o 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] option file
groups. mysqladmin also supports the options for processing option
files described at Section 4.2.3.3.1, "Command-Line Options that Affect
Option-File Handling".
o --help, -?
Display a help message and exit.
o --character-sets-dir=path
The directory where character sets are installed. See Section 9.5,
"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'.
o --debug-check
Print some debugging information when the program exits. This
option was added in MySQL 5.1.21.
o --debug-info
Print debugging information and memory and CPU usage statistics
when the program exits. This option was added in MySQL 5.1.14.
o --default-character-set=charset_name
Use charset_name as the default character set. See Section 9.5,
"Character Set Configuration".
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. This option was added
in MySQL 5.1.17.
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 5.3.2.2, "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 via a named pipe. This option
applies only if the server supports named-pipe connections.
o --port=port_num, -P port_num
The TCP/IP port number to use for the connection.
o --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
allowable 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. Currently, 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.
o --ssl*
Options that begin with --ssl specify whether to connect to the
server via SSL and indicate where to find SSL keys and
certificates. See Section 5.5.6.3, "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 is removed in MySQL 5.5.
o connect_timeout
The maximum number of seconds before connection timeout. The
default value is 43200 (12 hours).
o shutdown_timeout
The maximum number of seconds to wait for server shutdown. The
default value is 3600 (1 hour).
COPYRIGHT
Copyright (C) 1997, 2010, Oracle and/or its affiliates. All rights
reserved.
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 02110-1301 USA or see
http://www.gnu.org/licenses/.
SEE ALSO
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/.
AUTHOR
Oracle Corporation (http://dev.mysql.com/).