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Ending problematic queries in MySQL

schedule Aug 12, 2023
Last updated
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MySQL
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You can end problematic processes in MySQL by using the KILL statement:

KILL 12345;
Query OK, 0 rows affected (0.02 sec)

12345 in the above example is the process number of the problematic process. If you do not know this you can confirm this using the below command which shows all running processes:

SHOW PROCESSLIST;

Example

To confirm all running processes:

SHOW PROCESSLIST;
+----+------+----------------+--------+---------+------+-------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+------+----------------+--------+---------+------+-------+------------------+
| 10 | root | localhost:4049 | people | Sleep | 39 | | NULL |
| 13 | root | localhost:4451 | people | Query | 0 | NULL | SHOW PROCESSLIST |
+----+------+----------------+--------+---------+------+-------+------------------+

To kill process with Id = 10:

KILL 10;
Query OK, 0 rows affected (0.00 sec)

To confirm process with Id = 10 has been ended:

SHOW PROCESSLIST;
+----+------+----------------+--------+---------+------+-------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+------+----------------+--------+---------+------+-------+------------------+
| 13 | root | localhost:4451 | people | Query | 0 | NULL | SHOW PROCESSLIST |
+----+------+----------------+--------+---------+------+-------+------------------+
robocat
Published by Arthur Yanagisawa
Edited by 0 others
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