(Also see http://www.sharepointassist.com/2009/12/02/owstimer-pegging-cpu-and-filling-logs/) Problem SharePoint not responding or responding slowly and you note OWSTIMER.EXE and w3wp.exe running at a combined 100%? In my case this occurred because a developer created a workflow and executed it simultaneously on an entire list of at least a thousand items. What ends up happing is that you get a snowball effect of users and OWSTIMER trying to access the system, eventually it gets overwhel...