PC Knowledge Base - Windows Operating System Gather Performance Data Perfmon
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To log performance data,
Start Perfmon
Select View|Log, Edit|Add to log.
Select all objects using the mouse and shift key, then click Add|Done.
To begin the logging session:
Select Options|Log, enter the name of your log file (e.g., test1-perfmon-log),
Specify a sampling interval, and then click start.
Perfmon uses about the same amount of resources to collect measurements from one object or many objects from NT Server's performance library DLLs, so collect them all except for network segment.