MAS 4.0.223.0 pegging processor

[cbak999]

I upgraded to MAS 4.0.223.0 from 4.0.113.0 last month. Everything has been fine. Until yesterday. At about 9:35am, the processor on the MAS server went to 100% and stayed there. I rebooted the MAS and it went down. This morning, the same thing happened. I rebooted it today, and it immediately went back to 100%. I have stopped the individual blades of MCA and Mobile Communicator and that has no affect. So how do I troubleshoot this?? With the processor pegged, dialing into voice mail sounds like a horrible cell phone call. Help! I have ruled out any issues with the VMWare ESXi host and our SAN that the machine runs on. The MAS server has 4.5GB of RAM and 2 virtual procs. Thanks!! At this point, I am thinking about reverting back to 4.0.113.0.
Chris Bak

[dilkie]

what does "top" tell you when you log into the console?

[LoopyLou]

And when you upgraded you stuck to the same size as before ( i.e it looks like you selected small business based on the CPU and RAM totals )?