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The Perfmon command allows you to start the Windows Reliability and Performance Monitor in a specific standalone mode. Perfmon, also known as “Performance Monitor”, got its roots as a command called, “sysmon.exe” in Windows 95, 98 and XP. The perfmon command is used to view information about a systems; CPU, Disk, Network and Memory statistics.

Syntax ():

perfmon </res|report|rel|sys>

Syntax Explanation

• /res: Start Resource View.
• /report: Start the System Diagnostics Data Collector Set and display a report of the results.
• /rel: Start Reliability Monitor.
• /sys: Start Performance Monitor.

Explanation with Examples

To view the performance monitor in a standalone view:

c:perfmon

To view the resource monitor in a standalone view:

c:perfmon /res

To view the reliability monitor built into Windows Vista and 7:

c:perfmon /rel