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Problem

Since the increasing of the cores on the Windows VM, the graphs shows constant values without any change

The Windows Agent is executing the following commands to get the values:

Get-WmiObject -class Win32_PerfRawData_PerfOS_System -namespace   root\cimv2 |Format-List *


Get-WmiObject -class Win32_PerfRawData_PerfOS_System -namespace root\cimv2 |Format-List ProcessorQueueLength



Solution

Checkmk is caching these values with the corresponding timestamp. In this case, the new timestamp has a smaller value than the new one. That's why Checkmk is presenting always the old/constant values. We suspect that this because of the core modification. It looks like Windows is resesting some system counters. To solve this, you need to remove the cached counter file:

  1. Stop the site

    omd stop <SITENAME>

  2. As Site user you should find this file: ~/tmp/check_mk/counters/<HOSTNAME>. In this file, you need to delete the following section:

    ('wmi_cpuload', None, 'load_5min'): (29632775.478311848, 18.056825022850912), ('wmi_cpuload', None, 'load_15min'): (29632775.478311848, 15.787631011576273),

  3. Attached, you will find a screenshot with the marked section:

  4. Start the site

    omd start <SITENAME>



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