Seem like something is causing my w3wp process every few minutes. There are no code changes or changes to web.config that can cause this. Application pool IdleTimeout is also set to 2 hours. I am just trying to find what is causing this process re-start. Does this type of information goes into any of IIS log. Currently I am looking at logs located at C:\Inetpub\logs\LogFiles\W3SVC1 but don't find any indications about these re-starts. Any idea where can I find this info?
Might be an unhandled exception of some kind.
Have you checked the Windows Application Error Log?