Solution to IIS7, IIS7.5 application pool recycling of suspended animation method _win Server

I recently had a Windows 2008 server that always has IIS suspended, the Web site is always inaccessible, and sometimes it can be resolved by restarting IIS, and then looking at the IIS events, writing that the worker process for the application pool is closed because of inactivity. The application pool timeout configuration is set to 20 minutes. A new process will be started when needed, and many sites have similar events. Finally found a solution, to make a memo.

The practice is to open the application pool--Advanced settings--To change the "Prevent overlapping collection" option to "true".