Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Is there a good manual for the Windows Performance tool?

I want to find something I can read to describe what the data means that it is collecting.

I have output from Perfmon that shows that I have a process using more then 100% of the CPU. I don't know how that is possible.

share|improve this question
up vote 1 down vote accepted

There is a chapter or two in the Windows Resource Kit that covers performance monitor that I've always found helpful. In addition, the blog of the performance team has been a good resource. The blog address is: and you can find more information about the resource kit at (Even though this is a server reource kit, much of the information will still apply)

In particular, I believe what you are seeing is that %Process Time counter under the Process object shows a SUM of all CPUs on the machine, which can result in values over 100%. The %Process Time counter under the Proccesor object shows the AVE across all CPUs.

Thanks, Mark

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.