I will be upgrading to a server with more memory, and I’d like to allow it to use more than 50% for the ZFS cache. I have seen some past discussions about this, which suggest using a sysctl “tunable” (advanced settings). The parameters I’ve seen suggested are either vfs.zfs.arc_max or zfs_arc_max, but neither of those appear to exist on my system. In fact, # sysctl -a | grep zfs doesn’t return anything relevant.
The only way to change this parameter that seems available is manually writing to /sys/module/zfs/parameters/zfs_arc_max, but that doesn’t feel right. Any suggestions applicable to the current version would be appreciated.
Cobia was the last version with the 50% limit. You don’t have to do anything on dragonfish or later this month electric eel to use more then 50% arc
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Is that what “behave identically to TrueNAS CORE” means?
Yes, that’s what it means