Windows Guest memory utilization problem on PVE 9.0.x

rzirzi

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Jan 22, 2021
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After upgrade from PVE 8.x to 9.0 - the Windows guest machine shows memory usage about 100,47%. I have installed latest virtio drivers, dosabled balooning and checked many other parameters... Nothing helps. Is that a PVE bug? I have never had similar problem with this VM before upgrade to PVE 9.0.x
 
pve-manager/9.0.6/49c767b70aeb6648 (running kernel: 6.14.11-1-pve)
one of the windows VMs shows 100.xx% memory usage in PVE VM summary.
windows 11 guest, memory 16384MB, ballooning enabled, minimum memory 16384MB.
virtio 0.1.271 (updated from 0.1.240 to 0.1.266 and 0.1.271 due that issue), taskmanager shows 3.2GB ram usage.
BalloonService / blnsvr.exe up and running.

everything works fine so far, so it is cosmetic issue for me.
 
Last edited:
What do you get back if you run info balloon in the "Monitor" submenu of the VM?
 
following output:
balloon: actual=8192 max_mem=8192 last_update=1756638096

interesting, last update August 31. 01:51 oclock. about that time i did a minor PVE update + reboot + updated virtio drivers to 0.1.271

checked on different VM where memory is shown correctly:
balloon: actual=4096 max_mem=4096 total_mem=4095 free_mem=2355 mem_swapped_in=10480902144 mem_swapped_out=297967616 major_page_faults=383769 minor_page_faults=96456984 last_update=1756784004

both VMs are nearly identical, both on same node, both got same virtio driver in the night.

another affected vm, guest is server 2012r2 with some old virtio drivers:
balloon: actual=8192 max_mem=8192 last_update=1756605071
 
Last edited:
Also had a win11 guest showing 100% cpu usage after upgrading to pve9.

Fixed by installing new virtio drivers iso (0.1.285)
 
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