Can MySQL Limit Query Execution Time Through my.cnf Configuration?

Can MySQL Restrict Query Execution Time?

As you seek to limit the maximum execution time of MySQL queries, the question arises: can this be achieved through my.cnf file configuration? While this may seem like an intuitive solution, documentation reveals no relevant provisions for this setting.

Solution:

Unfortunately, there is no built-in mechanism to enforce a maximum query execution time upon sending a query to the server. However, a workaround exists through cron jobs executed at regular intervals, typically every second.

The process involves:

1. Querying the database to display its process list using SHOW PROCESSLIST.
2. Filtering the results to identify connections with query times exceeding a specified limit.
3. Killing those processes using the KILL command with their respective process IDs.

This cron job effectively serves as a watchtower, ensuring that queries do not overstep their allotted execution time. It allows for proactive termination of excessively long-running queries, preventing potential bottlenecks or server performance issues.

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