mysql_zap

MariaDB until 10.1

mysql_zap has been removed in MariaDB 10.2. pkill can be used as an alternative.

mysql_zap kills processes that match a pattern. It uses the ps command and Unix signals, so it runs on Unix and Unix-like systems.

Invoke mysql_zap like this:

shell> mysql_zap [-signal] [-?Ift] 

A process matches if its output line from the ps command contains the pattern. By default, mysql_zap asks for confirmation for each process. Respond y to kill the process, or q to exit mysql_zap. For any other response, mysql_zap does not attempt to kill the process.

If the -signal option is given, it specifies the name or number of the signal to send to each process. Otherwise, mysql_zap tries first with TERM (signal 15) and then with KILL (signal 9).

mysql_zap supports the following additional options:

OptionDescription
--help, -?, -IDisplay a help message and exit.
-fForce mode. mysql_zap attempts to kill each process without confirmation.
-tTest mode. Display information about each process but do not kill it.

Example

localhost:~# mysql_zap -t mysql
stty: standard input: unable to perform all requested operations
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      4073  0.0  0.2   3804  1308 ?        S    08:51   0:00 /bin/bash /usr/bin/mysqld_safe
mysql     4258  3.3 15.7 939740 81236 ?        Sl   08:51  30:18 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306

pkill as an alternative

pkill can be used as an alternative to mysql_zap, although an important distinction between pkill and mysql_zap is that mysql_zap kills the server 'gently' first (with signal 15) and only if the server doesn't die in a limited time then tries -9.

To use pkill in the same way, one must run it twice; pkill --signal 15 mysqld ; sleep(10) ; pkill -f --signal 9 pattern

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