W3wp.exe taking high CPU usage

Hello,

We have a situation; w3wp.exe process is taking high CPU usage (100 %). During Initial Investigation we found every time 2 threads with in w3wpexe is taking 50 % CPU cycle each.

The physical memory usage is normal (400 – 500 MB) but the virtual address space usage is more 2.8 GB.

For a quick fix we are shutting down the application pool once CPU hits 95%.

I'm wondering if there's a way to find out what is causing CPU spike, or maybe the problem is somewhere else?

Help is greatly appreciated.

Thanks