VM's Memory usage higher on Promox 8.2 vs 7.4

[netswitch]

Hello

We have upgraded our hosts from proxmox 7.4 to 8.2.
We use the same hardware but we have been surprised to notice that the total ram usage is higher on 8.2 than on 7.4.

To be more specifi, on a 512 Go node with 50 Virtual machines we had 400 Go of ram used when running proxmox 7.4.
Migrating all these VM's on a proxmox 8.2 host, same hardware, we have a ~440 Go ram usage.
(Total ram allowed to the VM's is around 500 Go)

Is this expected or is there some parameter to adapt ?
It this related to some difference in caching ? (write cache for the storage)

 

[leesteken]

You're not the only one: https://forum.proxmox.com/threads/kernel-6-8-5-2-and-6-8-5-3-consumes-more-memory-than-6-5.147603/

 

[netswitch]

Thanks, I ll close this post as it's better to follow in only one.