mysqladmin
(1)
名称
mysqladmin - client for administering a MySQL server
用法概要
mysqladmin [options] command [command-options] [command
[command-options]]
...
描述
MySQL Database System MYSQLADMIN(1)
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.
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).
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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 6.1.2.4, "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.
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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 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.
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 13.7.5.30, "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.
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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.
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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 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".
o --help, -?
Display a help message and exit.
o --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. It is
not available in standard MySQL Server 5.5 releases.
o --character-sets-dir=path
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
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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.
o --debug-info
Print debugging information and memory and CPU usage
statistics when the program exits.
o --default-auth=plugin
The client-side authentication plugin to use. See
Section 6.3.6, "Pluggable Authentication".
This option was added in MySQL 5.5.9.
o --default-character-set=charset_name
Use charset_name as the default character set. See
Section 10.5, "Character Set Configuration".
o --enable-cleartext-plugin
Enable the mysql_clear_password cleartext authentication
plugin. (See Section 6.3.6.4, "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
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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 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.
o --pipe, -W
On Windows, connect to the server using a named pipe.
This option applies only if the server supports
named-pipe connections.
o --plugin-dir=path
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.
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
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
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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 using SSL and indicate where to find SSL
keys and certificates. See Section 6.3.8.4, "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:
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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
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ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+---------------+--------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------+
|Availability | database/mysql-55/client |
+---------------+--------------------------+
|Stability | Uncommitted |
+---------------+--------------------------+
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/).
NOTES
This software was built from source available at
https://java.net/projects/solaris-userland. The original
community source was downloaded from
http://downloads.mysql.com/archives/mysql-5.5/mysql-5.5.31.tar.gz
Further information about this software can be found on the
open source community website at http://dev.mysql.com/.
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