MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

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Figure 19-3 The Performance tab provides real-time performance data about the CPU, RAM, and
virtual memory.
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Table 19-2 describes the fields that are displayed by default on the Performance tab in
Task Manager.
Table 19-2 Performance Tab Fields
Field Description
CPU Usage The percentage of time that the processor is busy. If this graph displays a
high percentage continuously (and not when there is an obvious reason,
such as a big application), your processor might be overloaded. If your
computer has two processors, two graphs are shown. If this value runs
continuously over 80 percent, you probably see a noticeable improvement
in performance if you upgrade your processor.
CPU Usage History The percentage of time that the processor is running a thread other than
the idle thread shown over time. You can use the Update Speed command
on the View menu to specify how often the values are refreshed.
The High value updates about twice per second; Normal value updates
once every two seconds; Low value updates once every four seconds.
You can also pause the updates and update the view manually by pressing
F5. This is a useful method if you want to monitor some specific
activity. Note that Task Manager itself uses processor time. The more frequently
you update the display, the more processor time it uses, which
throws off the accuracy of whatever you are analyzing.
PF Usage The amount of virtual memory used (in MB).
Page File Usage
History
Lesson 1 Using Task Manager
The amount of virtual memory used, shown over time. Values set using
the Update Speed command affect this history as well.