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- An excellent explanation of how to use "perfmon.exe". It is written for Windows 10, but when you get the idea, it fits all Windows Versions:
https://www.windowscentral.com/how-use-performance-monitor-windows-How to use Performance Monitor on Windows 10 - When you've gathered the counter's numerical values, it is time to integrate them into Checkmk by creating your own check plugin.
We assume the Windows agent is v1.6 or newer (configuration with .yml file, see here: https://docs.checkmk.com/latest/en/agent_windows.html#agent_architecture) Architecture of the agent.
How-tos and Troubleshooting
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