in our production environment (we are running SP 2010 Enterprise) I have noticed that we are starting to see the App Pool for the main SharePoint Web Application restart during the day. These are scheduled to only restart during the night, in checking the Event Logs around the restarts I see error messages like the following:
A process serving application pool 'Main_Site' suffered a fatal communication error with the Windows Process Activation Service. The process id was '5212'. The data field contains the error number.
I am not finding anything in the ULS Log and wondering if there is a way to somehow get some other information on the crashes, there don't seem to be any dump files anywhere. I think this is probably some sort of memory exception but I can't find anything in the existing logs that would actually confirm this for me.