MOSS 2007 Application Pool Recycling
Posted on 2011-02-21
Hi, can anyone help with an issue of a web application pool recycling out of control? Recently I started a new job as a Sharepoint administrator for a MOSS 2007 farm. The first week I noticed the application pool for the main site recycled every few minutes, with the following event in the System log:
Event Type: Information
Event Source: W3SVC
Event Category: None
Event ID: 1077
A worker process with process id of '3848' serving application pool '**' has requested a recycle because it reached its virtual memory limit.
At first I assumed it was a memory usage issue. In the application pool properties, Memory Recycling, Maximum Virtual Memory was set to 750 MB, and Maximum Used Memory was set to 187 MB. Looking at Task Manager, it looked like the w3wp.exe process was hitting the Maximum Used Memory threshold and recycling. Virtual memory was nowhere near the limit. So I set Maximum Used Memory to 512 MB. Now, the 1077 events are still happening every few minutes (and the process appears to be using more memory, recycling itself at around 250 MB). Now I'm not 100% sure the 1077's are related to memory usage.
Is it necessary to cycle IIS services after changing Maximum Used Memory setting?
Any other ideas on how to troubleshoot Sharepoint-IIS application pool recycles?
Many thanks in advance,