Hi there.
Some time ago, I read that if someone wants better monitoring, then they need to set up specialized monitoring software and not rely on PVE graphs. Nevertheless, I do believe that ZFS users without monitoring software (like me) could benefit from showing ARC size in a memory usage graph (at node summary). I do think so, because without that, the graph is not very useful and does not show VMs' actual memory usage. By default, ARC can consume up to 50% of RAM. Thus, it's typical that ARC can eat more RAM than the VMs themselves (on my homelab 32GB-node ARC went to 15.9 GB, and VMs are only 7.2 GB).
So, my question is, is there any way to add the ARC size to the memory graph?
Some time ago, I read that if someone wants better monitoring, then they need to set up specialized monitoring software and not rely on PVE graphs. Nevertheless, I do believe that ZFS users without monitoring software (like me) could benefit from showing ARC size in a memory usage graph (at node summary). I do think so, because without that, the graph is not very useful and does not show VMs' actual memory usage. By default, ARC can consume up to 50% of RAM. Thus, it's typical that ARC can eat more RAM than the VMs themselves (on my homelab 32GB-node ARC went to 15.9 GB, and VMs are only 7.2 GB).
So, my question is, is there any way to add the ARC size to the memory graph?
. If I understand it correctly, ARC has a low priority ram usage (it may be true only for freebsd though), thus that isn't very practical to set it only to 10%. OTOH I do believe proxmox devs know what they are doing.