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8.7 `mysqladmin' -- Client for Administering a MySQL Server
===========================================================
`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 commands described in the following list.
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.
* `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
password-hashing.)
* `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"
* `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'. (See
show-processlist.)
* `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 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:
* -help, -?
Display a help message and exit.
* -character-sets-dir=PATH
The directory where character sets are installed. See
character-sets.
* -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.
This works only with the -sleep option.
* -debug[=DEBUG_OPTIONS], -# [DEBUG_OPTIONS]
Write a debugging log. The DEBUG_OPTIONS string often is
`'d:t:o,FILE_NAME''. The default is
`'d:t:o,/tmp/mysqladmin.trace''.
* -default-character-set=CHARSET_NAME
Use CHARSET_NAME as the default character set. See
character-sets.
* -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.
* -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, you are prompted
for one.
Specifying a password on the command line should be considered
insecure. See password-security.
* -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.
* -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.
* -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.
* -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.
* -user=USER_NAME, -u USER_NAME
The MySQL username 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
syntax:
* `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).
It is also possible to set variables by using
-set-variable=VAR_NAME=VALUE or -O VAR_NAME=VALUE syntax. _This syntax
is deprecated_.
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