High RAM Usage?

[Dowd]

I am sure there is a thread about this, but I am not sure where to look. I think its ZFS related, but I don't understand the reason. I currently have a proxmox server with:

AMD Ryzen 9 7950X
192GB RAM
2 x 4TB NVME,

On it, I have 3 VMs

1 x Windows VM, allocated 8 cores, 16GB RAM
2 x Debian VM, allocated 4 cores, 8GB RAM

The total RAM across all VMs is 32GB. I am aware that ZFS seems to use double that, so I expect 64GB RAM used, however I am currently sitting at 122GB out of 187.89GB used in the VM Summary tab, which is really excessive. I am not sure if this is intentional or something I need to tune down.

 

[leesteken]

I think its ZFS related, but I don't understand the reason.

The total RAM across all VMs is 32GB. I am aware that ZFS seems to use double that, so I expect 64GB RAM used, however I am currently sitting at 122GB out of 187.89GB used in the VM Summary tab, which is really excessive. I am not sure if this is intentional or something I need to tune down.

Please note that this has been asked and answered many times over on this forum, so I'm just summarize. ZFS uses 50% of your host memory, which is 96GB. This is the ZFS on Linux default, and not Proxmox specific. Please read the manual: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysadmin_zfs_limit_memory_usage