High RAM consumption

[saku]

Good morning,

This is my first request for help in the community (I hope I am doing the right thing).
I currently have a node with Proxmox ve 7.3, in which I have 7 VM's up, the sum of ram of all these virtual machines is 64GB, the node currently has 128gb of ram memory.
My problem is: the node's ram memory consumption is currently at 105Gb, I have no explanation why this consumption if the sum of the machines is not so high, and as the days go by this consumption continues to rise. I have not managed to find information about it and a possible solution, I come to you for your great help.

 

[Dunuin]

I would guess you use ZFS for raid. ZFS uses dynamically up to 50% of your hosts RAM for caching. Run arc_summary to see how much RAM is used by the ARC. If it is the ARC this shouldn't be a problem unless you see VMs getting killed. In that case you could limit the ARC as described here: https://pve.proxmox.com/wiki/ZFS_on_Linux#sysadmin_zfs_limit_memory_usage
But unused RAM is wasted RAM and the bigger your ARC the better for IO, so not a bad thing to have a big ARC.

 

[saku]

I would guess you use ZFS for raid. ZFS uses dynamically up to 50% of your hosts RAM for caching. Run arc_summary to see how much RAM is used by the ARC. If it is the ARC this shouldn't be a problem unless you see VMs getting killed. In that case you could limit the ARC as described here: https://pve.proxmox.com/wiki/ZFS_on_Linux#sysadmin_zfs_limit_memory_usage
But unused RAM is wasted RAM and the bigger your ARC the better for IO, so not a bad thing to have a big ARC.

Thank you very much for your prompt response and your time, this is the record I currently have for

arc_summary

.

 

[Dunuin]

So ZFS is using between 3.9 and 62.7GB RAM with now using 62.7GB.

 

[saku]

Thank you very much @Dunuin for all your help, apparently RAM consumption has been improved.