[SOLVED] ZFS ARC cache reporting on dashboard

[caerbannog]

I have been running proxmox on a dual NVMe ZFS RAID mirror for a little while now, and i have learned of the way ZFS passively consumes memory. That way being 50% as a default base line and dynamically scaling down as applications consume more memory assuming i am correct. Given that ARC memory consumption can get out of the of my VMs automaticly and when needed, can be assumed to be there in times when memory is abundant, and is not critical to the performance (because NVMe) or functionality of the system. Is it possable to configure or at least reasonable to want the proxmox web interface to subtract the ARC cache from RAM usage in the web interface, and leave viewing statistics with ARC consumption for another graph or the arcstat and other commands. I just want to know at a glance how much memory my VMs and LXCs are using, and not be conserned every time i open the web interface for my singal node and go to look at memory usage.

 

[UdoB]

being 50% as a default base line

For some time now the default is 10%. You can specify a more distinct value after reading "Limit ZFS Memory Usage" here: https://pve.proxmox.com/wiki/ZFS_on_Linux

 

[caerbannog]

Thanks for plugging that hole in my knowledge, i suppose most the comments i read through where written by commenters that had not yet caught wind of the change in addition to fact that i had read those changes ether. However, i would still like some kind of answer to the primary question. That being: Is it possible to get a memory use graph that excludes ARC. Ideally in the summary tab of my node.

 

[Neobin]

For reference:

• https://bugzilla.proxmox.com/show_bug.cgi?id=1454
• https://bugzilla.proxmox.com/show_bug.cgi?id=1454#c26

 

[caerbannog]

Thanks, for the info. It's good to know that I'm not completely insane in wanting ZFS ARC usage to not completely corrupt the data on the memory usage graph.