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Problem

Since the increase of the cores on the Windows VM, the graphs show constant values without any change.

The Windows Agent executes 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 always presenting the old/constant values. We suspect that this is because of the core modification. It looks like Windows is resetting some system counters.

To solve this, you need to remove the cached counter file:

1. Stop the site

   Code Block
   language bash theme RDark
   root@mylinuxhost~# 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:

   Code Block
   language bash theme RDark title ~/tmp/check_mk/counters/<HOSTNAME>
   ('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

   Code Block
   language bash theme RDark
   root@mylinuxhost~# omd start <SITENAME>

   
   

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