mysqladmin
is an administration program for the mysqld daemon. It can be used to:
From MariaDB 10.4.6, mariadb-admin
is a symlink to mysqladmin
.
The command to use mysqladmin
and the general syntax is:
mysqladmin [options] command [command-arg] [command [command-arg]] ...
mysqladmin
supports the following options:
Option | Description | Added |
---|---|---|
--character-sets-dir=name |
Directory where the character set files are located. | |
-C , --compress
|
Compress all information sent between the client and the server if both support compression. | |
--connect_timeout=val |
Maximum time in seconds before connection timeout. The default value is 43200 (12 hours). | |
-c val , --count=val
|
Number of iterations to make. This works with -i (--sleep ) only. |
|
--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 |
Check memory and open file usage at exit. | |
--debug-info |
Print debugging information and memory and CPU usage statistics when the program exits. | |
--default-auth=plugin |
Default authentication client-side plugin to use. | |
--default-character-set=name |
Set the default character set. | |
-f , --force
|
Don't ask for confirmation on drop database; with multiple commands, continue even if an error occurs. | |
-? , --help
|
Display this help and exit. | |
-h name , --host=name
|
Hostname to connect to. | |
-l , --local
|
Suppress the SQL command(s) from being written to the binary log by enabling sql_log_bin=0 for the session, or, from MariaDB 10.2.7 and MariaDB 10.1.24, for flush commands only, using FLUSH LOCAL rather than SET sql_log_bin=0 , so the privilege requirement is RELOAD rather than SUPER. |
MariaDB 10.2.5, MariaDB 10.1.22, MariaDB 10.0.30 |
-b , --no-beep
|
Turn off beep on error. | |
-p[password] , --password[=password]
|
Password to use when connecting to server. If password is not given it's asked from the terminal. | |
--pipe , -W
|
On Windows, connect to the server via a named pipe. This option applies only if the server supports named-pipe connections. | |
-P portnum , --port=portnum
|
Port number to use for connection, or 0 for default to, in order of preference, my.cnf, $MYSQL_TCP_PORT, /etc/services, built-in default (3306). | |
--protocol=name |
The protocol to use for connection (tcp, socket, pipe, memory). | |
-r , --relative
|
Show difference between current and previous values when used with -i . Currently only works with extended-status. |
|
-O value , --set-variable=vaue
|
Change the value of a variable. Please note that this option is deprecated; you can set variables directly with --variable-name=value . |
|
--shutdown_timeout=val |
Maximum number of seconds to wait for server shutdown. The default value is 3600 (1 hour). | |
-s , --silent
|
Silently exit if one can't connect to server. | |
-i delay , --sleep=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. |
|
-S name , --socket=name
|
For connections to localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use. | |
--ssl |
Enables TLS. TLS is also enabled even without setting this option when certain other TLS options are set. Starting with MariaDB 10.2, the --ssl option will not enable verifying the server certificate by default. In order to verify the server certificate, the user must specify the --ssl-verify-server-cert option. |
|
--ssl-ca=name |
Defines a path to a PEM file that should contain one or more X509 certificates for trusted Certificate Authorities (CAs) to use for TLS. This option requires that you use the absolute path, not a relative path. See Secure Connections Overview: Certificate Authorities (CAs) for more information. This option implies the --ssl option. |
|
--ssl-capath=name |
Defines a path to a directory that contains one or more PEM files that should each contain one X509 certificate for a trusted Certificate Authority (CA) to use for TLS. This option requires that you use the absolute path, not a relative path. The directory specified by this option needs to be run through the openssl rehash command. See Secure Connections Overview: Certificate Authorities (CAs) for more information. This option is only supported if the client was built with OpenSSL or yaSSL. If the client was built with GnuTLS or Schannel, then this option is not supported. See TLS and Cryptography Libraries Used by MariaDB for more information about which libraries are used on which platforms. This option implies the --ssl option. |
|
--ssl-cert=name |
Defines a path to the X509 certificate file to use for TLS. This option requires that you use the absolute path, not a relative path. This option implies the --ssl option. |
|
--ssl-cipher=name |
List of permitted ciphers or cipher suites to use for TLS. This option implies the --ssl option. |
|
--ssl-crl=name |
Defines a path to a PEM file that should contain one or more revoked X509 certificates to use for TLS. This option requires that you use the absolute path, not a relative path. See Secure Connections Overview: Certificate Revocation Lists (CRLs) for more information. This option is only supported if the client was built with OpenSSL or Schannel. If the client was built with yaSSL or GnuTLS, then this option is not supported. See TLS and Cryptography Libraries Used by MariaDB for more information about which libraries are used on which platforms. | |
--ssl-crlpath=name |
Defines a path to a directory that contains one or more PEM files that should each contain one revoked X509 certificate to use for TLS. This option requires that you use the absolute path, not a relative path. The directory specified by this option needs to be run through the openssl rehash command. See Secure Connections Overview: Certificate Revocation Lists (CRLs) for more information. This option is only supported if the client was built with OpenSSL. If the client was built with yaSSL, GnuTLS, or Schannel, then this option is not supported. See TLS and Cryptography Libraries Used by MariaDB for more information about which libraries are used on which platforms. |
|
--ssl-key=name |
Defines a path to a private key file to use for TLS. This option requires that you use the absolute path, not a relative path. This option implies the --ssl option. |
|
--ssl-verify-server-cert |
Enables server certificate verification. This option is disabled by default. | |
--tls-version=name |
This option accepts a comma-separated list of TLS protocol versions. A TLS protocol version will only be enabled if it is present in this list. All other TLS protocol versions will not be permitted. See Secure Connections Overview: TLS Protocol Versions for more information. | MariaDB 10.4.6 |
-u , --user=name
|
User for login if not current user. | |
-v , --verbose
|
Write more information. | |
-V , --version
|
Output version information and exit. | |
-E , --vertical
|
Print output vertically. Is similar to '--relative ', but prints output vertically. |
|
-w[count] , --wait[=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. | |
--wait-for-all-slaves |
Wait for the last binlog event to be sent to all connected slaves before shutting down. This option is off by default. | MariaDB 10.4.4 |
In addition to reading options from the command-line, mysqladmin
can also read options from option files. If an unknown option is provided to mysqladmin
in an option file, then it is ignored.
The following options relate to how MariaDB command-line tools handles option files. They must be given as the first argument on the command-line:
Option | Description |
---|---|
--print-defaults |
Print the program argument list and exit. |
--no-defaults |
Don't read default options from any option file. |
--defaults-file=# |
Only read default options from the given file #. |
--defaults-extra-file=# |
Read this file after the global files are read. |
--defaults-group-suffix=# |
In addition to the default option groups, also read option groups with this suffix. |
In MariaDB 10.2 and later, mysqladmin
is linked with MariaDB Connector/C. However, MariaDB Connector/C does not yet handle the parsing of option files for this client. That is still performed by the server option file parsing code. See MDEV-19035 for more information.
mysqladmin
reads options from the following option groups from option files:
Group | Description |
---|---|
[mysqladmin] |
Options read by mysqladmin , which includes both MariaDB Server and MySQL Server. |
[client] |
Options read by all MariaDB and MySQL client programs, which includes both MariaDB and MySQL clients. For example, mysqldump . |
[client-server] |
Options read by all MariaDB client programs and the MariaDB Server. This is useful for options like socket and port, which is common between the server and the clients. |
[client-mariadb] |
Options read by all MariaDB client programs. |
Variables can be set with --variable-name=value
.
Variables and boolean options | Value |
---|---|
count |
0 |
debug-check |
FALSE |
debug-info |
FALSE |
force |
FALSE |
compress |
FALSE |
character-sets-dir |
(No default value) |
default-character-set |
(No default value) |
host |
(No default value) |
no-beep |
FALSE |
port |
3306 |
relative |
FALSE |
socket |
/var/run/mysqld/mysqld.sock |
sleep |
0 |
ssl |
FALSE |
ssl-ca |
(No default value) |
ssl-capath |
(No default value) |
ssl-cert |
(No default value) |
ssl-cipher |
(No default value) |
ssl-key |
(No default value) |
ssl-verify-server-cert |
FALSE |
user |
(No default value) |
verbose |
FALSE |
vertical |
FALSE |
connect_timeout |
43200 |
shutdown_timeout |
3600 |
mysqladmin [options] command [command-arg] [command [command-arg]] ...
Command is one or more of the following. Commands may be shortened to a unique prefix.
Command | Description | Added |
---|---|---|
create databasename |
Create a new database. | |
debug |
Instruct server to write debug information to log. | |
drop databasename |
Delete a database and all its tables. | |
extended-status |
Return all status variables and their values. | |
flush-all-statistics |
Flush all statistics tables | |
flush-all-status |
Flush status and statistics. | |
flush-binary-log |
Flush binary log. |
MariaDB 10.0.30, MariaDB 10.1.25, MariaDB 10.2.5 |
flush-client-statistics |
Flush client statistics. | |
flush-engine-log |
Flush engine log. |
MariaDB 10.0.30, MariaDB 10.1.25, MariaDB 10.2.5 |
flush-error-log |
Flush error log. |
MariaDB 10.0.30, MariaDB 10.1.25, MariaDB 10.2.5 |
flush-general-log |
Flush general query log. |
MariaDB 10.0.30, MariaDB 10.1.25, MariaDB 10.2.5 |
flush-hosts |
Flush all cached hosts. | |
flush-index-statistics |
Flush index statistics. | |
flush-logs |
Flush all logs. | |
flush-privileges |
Reload grant tables (same as reload). | |
flush-relay-log |
Flush relay log. |
MariaDB 10.0.30, MariaDB 10.1.25, MariaDB 10.2.5 |
flush-slow-log |
Flush slow query log. | |
flush-status |
Clear status variables. | |
flush-table-statistics |
Clear table statistics. | |
flush-tables |
Flush all tables. | |
flush-threads |
Flush the thread cache. | |
flush-user-resources |
Flush user resources. |
MariaDB 10.0.30, MariaDB 10.1.25, MariaDB 10.2.5 |
flush-user-statistics |
Flush user statistics. | |
kill id,id,... |
Kill mysql threads. | |
password new-password |
Change old password to new-password. The new password can be passed on the commandline as the next argument (for example, mysqladmin password "new_password" , or, from MariaDB 10.0, can be omitted (as long as no other command follows), in which case the user will be prompted for a password. If the password contains special characters, it needs to be enclosed in quotation marks. In Windows, the quotes can only be double quotes, as single quotes are assumed to be part of the password. If the server was started with the --skip-grant-tables option, changing the password in this way will have no effect. |
|
old-password new-password |
Change old password to new-password using the old pre-MySQL 4.1 format. | |
ping |
Check if mysqld is alive. Return status is 0 if the server is running (even in the case of an error such as access denied), 1 if it is not. | |
processlist |
Show list of active threads in server, equivalent to SHOW PROCESSLIST. With --verbose , equivalent to SHOW FULL PROCESSLIST. |
|
reload |
Reload grant tables. | |
refresh |
Flush all tables and close and open log files. | |
shutdown |
Take server down by executing the SHUTDOWN command on the server. If connected 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. See also the --wait-for-all-slaves option. |
|
status |
Gives a short status message from the server. | |
start-all-slaves |
Start all slaves. | MariaDB 10.0.0 |
start-slave |
Start replication on a slave server. | |
stop-all-slaves |
Stop all slaves. | MariaDB 10.0.0 |
stop-slave |
Stop replication on a slave server. | |
variables |
Prints variables available. | |
version |
Returns version as well as status info from the server. |
The --wait-for-all-slaves
option was first added in MariaDB 10.4.4.
When a master server is shutdown and it goes through the normal shutdown process, the master kills client threads in random order. By default, the master also considers its binary log dump threads to be regular client threads. As a consequence, the binary log dump threads can be killed while client threads still exist, and this means that data can be written on the master during a normal shutdown that won't be replicated. This is true even if semi-synchronous replication is being used.
In MariaDB 10.4 and later, this problem can be solved by shutting down the server with the mysqladmin
utility and by providing the --wait-for-all-slaves
option to the utility and by executing the shutdown
command with the utility. For example:
mysqladmin --wait-for-all-slaves shutdown
When the --wait-for-all-slaves
option is provided, the server only kills its binary log dump threads after all client threads have been killed, and it only completes the shutdown after the last binary log has been sent to all connected slaves.
See Replication Threads: Binary Log Dump Threads and the Shutdown Process for more information.
Quick check of what the server is doing:
shell> mysqladmin status Uptime: 8023 Threads: 1 Questions: 14 Slow queries: 0 Opens: 15 Flush tables: 1 Open tables: 8 Queries per second avg: 0.1 shell> mysqladmin processlist +----+-------+-----------+----+---------+------+-------+------------------+ | Id | User | Host | db | Command | Time | State | Info | +----+-------+-----------+----+---------+------+-------+------------------+ .... +----+-------+-----------+----+---------+------+-------+------------------+
More extensive information of what is happening 'just now' changing (great for troubleshooting a slow server):
shell> mysqladmin --relative --sleep=1 extended-status | grep -v " 0 "
Check the variables for a running server:
shell> mysqladmin variables | grep datadir | datadir | /my/data/ |
Using a shortened prefix for the version
command:
shell> mysqladmin ver mysqladmin Ver 9.1 Distrib 10.1.6-MariaDB, for debian-linux-gnu on x86_64 Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others. Server version 10.1.6-MariaDB-1~trusty-log Protocol version 10 Connection Localhost via UNIX socket UNIX socket /var/run/mysqld/mysqld.sock Uptime: 1 hour 33 min 33 sec Threads: 1 Questions: 281 Slow queries: 0 Opens: 64 Flush tables: 1 Open tables: 76 Queries per second avg: 0.050
If you get the error:
mysqladmin: shutdown failed; error: 'Access denied; you need (at least one of) the SHUTDOWN privilege(s) for this operation'
It means that you didn't use mysqladmin
with a user that has the SUPER or SHUTDOWN privilege.
If you don't know the user password, you can still take the mysqld process down with a system kill
command:
kill -SIGTERM pid-of-mysqld-process
The above is identical to mysqladmin shutdown
.
On windows you should use:
NET STOP MySQL
With MariaDB 10.0 and newer you can use the SHUTDOWN command from any client.
© 2019 MariaDB
Licensed under the Creative Commons Attribution 3.0 Unported License and the GNU Free Documentation License.
https://mariadb.com/kb/en/mysqladmin/