Performance counter library corruption disabling Hyper-V metrics

Question

Performance counter library corruption disabling Hyper-V metrics

Hafiz Omar 0

Hi community, we observe this behavior: Hyper-V admin consoles fail to display host CPU and memory metrics because Hyper-V Virtual Machine Health Monitor performance counters are corrupt. How do we reregister counters using lodctr?

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Answer 1

Hello Hafiz,

If the Hyper-V performance counter library is corrupted, you can rebuild the Windows performance counter registrations from an elevated Command Prompt:

`cd /d %windir%\system32 lodctr /R

cd /d %windir%\SysWOW64 lodctr /R

WINMGMT.EXE /RESYNCPERF`

Afterward, restart the Performance Logs & Alerts and Windows Management Instrumentation services, or reboot the Hyper-V host during an appropriate maintenance window.

Then verify that the Hyper-V counters are available:

Get-Counter -ListSet "Hyper-V*"

Hyper-V normally exposes counter sets such as Hyper-V Virtual Machine Health Summary, Hyper-V virtual processors, dynamic memory, storage, and networking counters.

I would use lodctr /R to rebuild the registered counter library rather than manually modifying individual Hyper-V counter registry entries. If the Hyper-V counter sets are still missing afterward, please share the Windows Server version/build and the output/error from lodctr /R and Get-Counter -ListSet "Hyper-V*".