VM Memory Usage Shows 102% After Upgrading to PVE 9

[sleel]

Hello everyone,
After upgrading to Proxmox VE 9, I noticed an issue with one of my virtual machines: its memory usage shows 102%.
This problem did not occur on Proxmox VE 8.
The QEMU Guest Agent and Ballooning are both enabled, but the issue still persists.
What should I check or adjust next?

 

[JeanL]

Hi,

See : https://pve.proxmox.com/wiki/Upgrade_from_8_to_9#VM_Memory_Consumption_Shown_is_Higher

Best regards,

 

[sleel]

I understand the above information. Is there no other solution?

 

[fiona]

Hi,
how does the usage within the VM look like? Is it close to 2 GiB? If yes:

values bigger than 100% are not a problem by itself, it's just more accurate since the QEMU can actually use more than the VM has available.

If the usage within the VM is not close to 2 GiB, there might be an issue with ballooning.

EDIT: see @leesteken's answer below for the rest

 

[aaron]

My guess is, since host mem usage and mem usage show the same value, that the VM does not report back any detailed information. You can check that in the Monitor submenu of the VM and run info balloon there. Compare the output from a VM that reports it correctly to see the difference in infos reported.

I want to reiterate that this is not a problem. With Proxmox VE 9 the reporting of mem used now reflects the reality more precisely than previously. Even if you saw lower values in the graph, the actual consumption on the host should not have changed.

 

[leesteken]

Because of the PCI(e) passthrough, all VM memory must be pinned into actual host memory, and the memory usage of the VM is therefore at least 100%.

 

[sleel]

Thank you all for the explanations! I think I understand now