http://msmvps.com/blogs/laflour/pages/net-tips-debug.aspxback to content INFO: " gc_heap::allocate_more_space" triggers a GC . >> "gc_thread_stub" which is the first function called on the GC threads. >> CPU utilization was listed under threadpool and stored in a variable byenCommunityServer 2008.5 SP2 (Build: 40407.4157)