From time to time I’ve noticed servers with a high CPU or pegged CPU to 100%.    This causes the entire system to lag and there’s no clear explanation why.
Looking at processes in System Manager shows the offending process.   It’s svchost.exe.   But that service is generic for a myriad of server-level processing.   So which actual application or service is causing the server CPU to spike and peg?
I found this excellent post that explains how to identify the actual service causing svchost.exe to peg the CPU.