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The Windows Management Instrumentation tends to time out on a regular basis, no matter which version is used or how big the machine is sized. Since WMI is responsible for collecting all performance data within Windows (which can also be also viewed with perfmon on the specific machines), this may likely result in Checkmk services go going stale, such as "Memory & Pagefile" and "Processor Queue". 

The easiest fix: reboot. If you reboot your systems on a regular basisregularly, i.e., once a month due to patching, this problem should occur quite rarely.

Another approach is to increase the WMI timeout in the Checkmk yml-configuration file, which is has been available since v1.6 (former: ini-file)

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Inside the C:\ProgramData\checkmk\agent\log\check_mk.log, you should see an error like this:

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Panel
bgColor#fff
  1. Go to the agent directory C:\ProgramData\checkmk\agent
  2. Open the check_mk.user.yml file and search for the wmi_timeout section. Remove the '#' and select the value.

    Code Block
    global:
      ...
      wmi_timeout: 7 # <- 7 sec, default ist 3
      ...


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Note

You can modify this file even when you're using the Agent Bakery!

This guidance is working for Checkmk 1.6 and 2.0


Info

With Checkmk 2.1, you can modify this timeout using the Agent Bakery:   https://checkmk.com/werk/12328

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