#MariaDB somehow clogs up, there is some #Friendica queries that run forever.

I can not:
- restart MariaDB by 'systemctl restart mariadb.service'
- restart all processes that run these query's to kill them

I can only kill mariadb, systemd will then automatically restart it.

How can I troubleshoot this, there seems to be nothing in the logs, just #mytop shows many long running queries when it happens. Otherwise it seems to run fine.

Any idea? Maybe an idea what to search for to find a solution? Whatever I searched for did not help. #MariaDB