ZFS ARC | Change ARC to 10% instead of default 50% #9964
Description
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Is your feature request related to a problem? Please describe.
Hey all,
Once again me to bother you.
This is more or less a system request, but I think its worth to consider it or at least discuss it.
Currently the ZFS ARC is for OPNsense set out of the box at 50%, which is the ZFS default. ARC likes to eat the RAM, not saying this is a bad thing, as it does what it should. But for many users the question comes up, why over 50% of my RAM is eaten.
Is there actually any benefit to have the ARC at 50% considering this is a FW?
Would not be more worth while to set it at 10%?
I personally do not see any benefit to have such huge ARC for a FW.
For example even Proxmox with ZFS deployment since 8.1 uses ZFS ARC size set to 10% for new installs. Considering what Proxmox does this 10% looks more than enough.
Reason why I am bit nit picking, is, I was redoing my Proxmox cluster into ZFS to take advantage of replication. So when I digged around it, and tested it, its totally enough and this is for a virtualisation and I run a lot of services and monitoring.
Describe the solution you like
Possibly decrease ARC to 10% instead of 50% if there is no real reason to have it at the default value for a FW.
Describe alternatives you considered
9%
Additional context
Really, looking for a reason why its at default value.