I don't think so... this is the 3rd day when the server drops at around this same hour. It will pick up in half an hour or so. slush said he will ask the provider what's going on. Hope he finds out.
I was watching today's outage whole time, with another sysadmin. We didn't found anything wrong with application, but internal routing looks corrupted. It is crazy that it is always at the same time and after some time it recover itself. Linode guys are saying that everything works on their side, but I'm now absolutely sure that those issues are related to infrastructure. So I'm forced to change provider, which unfortunately will take some time.
Since it happens in particular time, i am sure some task scheduling or automatic updates like that are setup(windows user, don't know abt linux...), also even antivirus, backup, many things run at predefined specific time. If you just look at task manager what takes more cpu at that time, then u can be 100 % sure where is problem.
In my pc lavasoft ad-aware runs many times itself, even though i have no scheduled task & its service takes 25% cpu causing high cpu for 20-30 minutes.
If i see, i just kill it. If not it just increases cpu temp.
I hope very minor glitch is giving major problem.