To open Performance Monitor in Windows 11, select Start, search for Performance Monitor, and open the result. The fastest keyboard method is Windows key+R, then type perfmon and press Enter.
Open Performance Monitor from Start or Run
Use Start search
- Open Start.
- Type Performance Monitor in the search box.
- Select the Performance Monitor result.
Use the Run dialog
- Press Windows key+R.
- Enter
perfmon. - Press Enter.
Microsoft’s perfmon command reference lists Windows 11 as an applicable version. The command starts the Performance Monitor snap-in.
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Which command opens a specific PerfMon view?
To launch Performance Monitor directly in its counter-graph view, enter perfmon /sys in the Run dialog or at a command prompt. Microsoft documents these additional modes:
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perfmon /resopens Resource View.perfmon /relopens Reliability Monitor.perfmon /reportruns the System Diagnostics Data Collector Set and displays its report.
These options are documented in Microsoft’s command reference.
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What Performance Monitor is for
Performance Monitor, often called PerfMon, is a Windows graphical tool for viewing and collecting performance-counter data. Counters expose measurements such as processor, memory, and disk activity. The snap-in also provides Data Collector Sets for recording selected counters and Reports for reviewing collected data. See Microsoft’s overview of performance counters.
Use it when you want to watch counter values or capture data over time, particularly if an issue is intermittent and hard to catch live. Microsoft cautions that performance counters are intended for administrative and diagnostic collection—not high-frequency collection more often than once per second or application profiling. See Microsoft’s performance-counter guidance.
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When to use another built-in monitoring tool
| Tool | Best suited to |
|---|---|
| Performance Monitor | Live performance-counter graphs, saved counter collections, and reports. |
| Resource Monitor | Resource-oriented inspection. |
| Task Manager | A quick overview of system activity. |
| Reliability Monitor | Reliability history; open it with perfmon /rel. |
These are related but distinct tools; a quick overview or reliability timeline does not replace a recorded counter collection. Microsoft’s command documentation covers the launch modes, while its troubleshooting guidance describes longer-running collections for transient issues in supported Windows Server environments. Those advanced procedures are Server-scoped and are not Windows 11 instructions.
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