Work with Performance Monitor for a few days. Create a few workspace and settings files, and watch the counters. Soon you'll have a better feel for your computer's performance and for Performance Monitor. Then, it's time to explore Performance Monitor's more advanced features.
One the best features is that you can run multiple copies of Performance Monitor on the same computer at the same time. Simply click the Performance Monitor icon, or your shortcut to it, again. Each time you click it, you get another copy of Performance Monitor:
This section describes the fine points of using Performance Monitor and will help you discover its range and its limitations.