I just spent the past few hours trying to patch my drupal boxes.
There have been warnings on the Internet to secure drupal boxes. I think that is what has been causing my servers to crash. Someone hacking in.
Certainly there are a LOT of log entries of people trying to get in.
For now my server is stable. Although I am trying to consolidate servers, this is a case for keeping services separate.
Just doing pushups and situps.