Memory usage chart vs. ZFS cache

[mcfly9]

Hi,

In a home lab environment, I have a server with 256GB RAM, a dozen VM's on it and a ZFS pool also in the same box. The RAM usage chart on the node summary page shows the total RAM usage, which makes sense.
A lot of times though, when I need to weigh how much RAM headroom I have for adding new VM's, it's back to the command line, looking at the ZFS cache RAM usage and subtracting from what the chart shows.
It would be nice if the RAM usage chart would show VM and ZFS RAM usage with a separate color.

In my case the chart always looks scary, but looking at it more carefully, out of the 240-200GB RAM usage, currently ~80GB is ARC and only 120GB is consumed by VM's - so no cause for concern, I can add quite a few more VM's.

 

[Neobin]

For reference:
https://bugzilla.proxmox.com/show_bug.cgi?id=1454

 

[lunchboxtheman]

I second this feature. I have the same "OH ****" reaction when I log into PVE and see my RAM usage at 70%+. Always takes me a second to realize it's ZFS.

It's a real pain to figure out how much RAM is used by the VMs/LXCs vs what is used in ZFS in the UI without dropping to the CLI on the host.

I really like the way TrueNAS has broken this down into a three-section pie chart like the below screenshot. Even if the same categories aren't used here, I think a three-section chart is useful. For the graphs perhaps a checkbox to toggle this, or a stacked graph, etc. Lots of ways to display this.

 

[esi_y]

I was just going to say +1 yourself to Bugzilla report (people do not do this enough), but it's a discussion there since 2017 with no input from staff other than marking duplicates. Telling...