For some weird reason my server has been going completely wacko on a daily basis at around eleven o'clock or so every single evening. And I mean completely wacko.

Tons of file access activity, that little red led flashing endlessly, i/o overload is what it is all about, the sounds of disk access echoing all over the place. No way to even access my web site because it all times out. What to do?

In order to investigate things further I have installed Nagios to see if perhaps I can figure out what the heck is happening.

Hopefully I will come up with an answer in the not so distant future, but we will have to see.