determine which application pool’s worker process (
w3wp.exe) is hogging your cpu resources. the command below can be run in a command prompt to list iis application pool pid’s. to view process id’s in task manager navigate to view | select columns | pid.
i’ve needed to do this several times when a single worker process was consuming too much cpu resources and needed to be killed. stopping the application pool did not help.
%windir%/system32/inetsrv/appcmd list wp