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Checking all running queries in MySQL

Database
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MySQL
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Cookbooks
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Server settings Cookbook
schedule Jul 1, 2022
Last updated
local_offer MySQL
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tocTable of Contents
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We can check all running queries on the MySQL server using the SHOW PROCESSLIST command:

SHOW PROCESSLIST;
+----+-----------------+-----------+------+---------+------+------------------------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+-----------------+-----------+------+---------+------+------------------------+------------------+
| 4 | event_scheduler | localhost | NULL | Daemon | 2119 | Waiting on empty queue | NULL |
| 8 | root | localhost | NULL | Query | 0 | starting | SHOW PROCESSLIST |
+----+-----------------+-----------+------+---------+------+------------------------+------------------+

This is useful when you are trying to diagnose problems or see what users are doing.

An alternative way would be to use the following command:

SELECT * FROM information_schema.PROCESSLIST;
+----+-----------------+-----------+------+---------+------+------------------------+----------------------------------------------+
| ID | USER | HOST | DB | COMMAND | TIME | STATE | INFO |
+----+-----------------+-----------+------+---------+------+------------------------+----------------------------------------------+
| 8 | root | localhost | NULL | Query | 0 | executing | SELECT * FROM information_schema.PROCESSLIST |
| 4 | event_scheduler | localhost | NULL | Daemon | 2249 | Waiting on empty queue | NULL |
+----+-----------------+-----------+------+---------+------+------------------------+----------------------------------------------+

Note that the TIME here is quoted in seconds.

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Published by Arthur Yanagisawa
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