mysqld dies with semaphore wait

Hi jerm

It appears you have a crashing MySQL instance you can try to take action to save the installation, for this advice I would encourage you to head over to the Percona forums related to support of Percona Server for MySQL: [URL]https://www.percona.com/forums/questions-discussions/mysql-and-percona-server[/URL]

If you can post this as a case related to Percona Server crashing we’ll then get more eyes on the issue and bring some sort of actions together to eliminate the crashing condition.

I suggest as part of your post that you share the System Overview dashboard for a period spanning crashes, using the pmm-server identifier. Here’s an example:
[URL=“Grafana”]Grafana

I hope this helps