I'ts a managed server frome somewhere else.
I can't get to the logs of mysql/apache , but it's weird that when phpbb3 was installed the server started crashing almost every 2 days. And the server used to crash only 2 times a month. So, there must be indeed somethign wrong wyt mysql/php on that server. It's not really managed by a professional team I must say. It's a community server that has been rented to host some forums, but if I look at the php version it's also very weird (it's not the kind of the stable version and I think I remember it was mysql 5 (an upwards version)
but I'll have to look into this further. phpbb3 that crashes the entire apache server is unlikely, right ?
I also want to mention it's an upgrade from 2 to 3