I have a webservice running which takes quit a long time to process due to complex queries to the database. It's a given the request can take up to 30-40 seconds before it returns a response. Under a high load the cpu goes up to 100% (hogged solely by w3wp.exe) and won't come back down even when...

I have the same problem. I note that when crash occurs, an executable DW20.exe is running 25% of CPU for 3-4 minutes. No special error in httperr logs. I do not find any user.dmp on the server. Where this file may be saved ?