MariaDB does not respect memory limits from

MariaDB does not respect the memory limit of 16 GB and fills up 90% of the system memory (28G)

This happens especially when a lot of INSERT statements are executed that call a AFTER INSERT TRIGGER.

Severity: The MariaDB server process crashes every 15 minutes or more often because of OOM killer. We wrote a script that restarts mariadb as soon as 75% RAM are occuped but sometimes this script is not fast enough and OOM killer ist faster.