Hello, thanks for the reply.
This setup is a test situation for my new hosting.
I don't think it is a resource problem. After a reset the problem wil show up sometimes, not always.
I'm a newby on MySQL but i don't see something strange in the logfiles.
When i have this problem, after a while the problem goes away and everything is running normal. (I have nothing to do)
Question: when a MySQL crasht will it be automaticly come back and run normal or is a restart nessecerly.
I have installed this multiserver setup with the this guide. The Perfect Server - Ubuntu 12.04 LTS (Apache2, BIND, Dovecot, ISPConfig 3).
At this moment i had no further information.