ESXi 8.0 Logs Repeated " Invalid securityDom "pmemGcDomgroup=host/vim/vmvisor/pmemGC": Not found" Warnings – Any Fix?

[dbTH]

Hello:

I recently installed the free version of VMware ESXi 8.0 U3e on a Supermicro X11 system with Intel Optane persistent memory configured in App Direct mode.

However, I'm consistently seeing warnings related to persistent memory garbage collection (pmemGC) in the logs, such as:

...
2025-05-31T18:05:00.504Z cpu2:2113742)WARNING: UserParam: 976: sh: Invalid securityDom "pmemGcDomgroup=host/vim/vmvisor/pmemGC": Not found
2025-05-31T18:10:00.519Z cpu2:2113832)WARNING: UserParam: 976: sh: Invalid securityDom "pmemGcDomgroup=host/vim/vmvisor/pmemGC": Not found
2025-05-31T18:15:00.531Z cpu4:2113926)WARNING: UserParam: 976: sh: Invalid securityDom "pmemGcDomgroup=host/vim/vmvisor/pmemGC": Not found
2025-05-31T18:20:00.549Z cpu6:2114028)WARNING: UserParam: 976: sh: Invalid securityDom "pmemGcDomgroup=host/vim/vmvisor/pmemGC": Not found
...

I confirmed that the pmemGarbageCollection service is enabled:

/etc/init.d/pmemGarbageCollection status
pmemGC is enabled

I also tried checking for an advanced setting related to pmemGcDomgroup, but this command returns no results:

esxcli system settings advanced list | grep -i pmemGcDomgroup | wc -l
0

It appears that pmemGcDomgroup=host/vim/vmvisor/pmemGC is an internal reference used by the ESXi kernel or VMkernel subsystems, and it's not something exposed through standard tools like esxcli or the vSphere UI.

Questions:

• Has anyone else experienced this issue with Optane PMem on ESXi 7 or 8?
• Is it safe to disable pmemGarbageCollection in this scenario?
• Is there any known way to create or assign a security policy/group for pmemGcDomgroup, or is this entirely handled internally by VMware?