All started Sunday, around 6AM GMT, our 4-year old dedicated server wasn't responding anymore and even a hardware reboot didn't bring it up. So, I opened a ticket and the technicians noticed the power supply died and quickly replaced it.
Everything worked fine until Monday morning, 9AM GMT, the server started to be unstable. I first thought it was Apache because during my tests, the process used several times 100% CPU when it crashed.
Then I tried stopping Apache and MySQL, the 2 most consuming processes (the CPU usage was on average at 6% without these 2 processes) and even with that, it was crashing after 15 minutes.
I thought that our kernel might be corrupted due to the crash of the server, so I tried using one of their netboot kernel (as well as the hardware testing mode) and it kept crashing.
So, I just opened another ticket for this issue. I really wonder what's going on.
Also, the migration of the forum and trac to the new server was planned at the end of this month but it might happen sooner than expected (I'll try to do it this week-end).
I'll keep you updated.