ZFS ARC tuning (was: "failed to reclaim memory" with much free physmem)

From: Graham Perrin <grahamperrin_at_gmail.com>
Date: Sat, 13 Sep 2025 03:02:01 UTC
On 13/09/2025 03:25, Rick Macklem wrote:

> …
> - setting vfs.zfs.arc_max to a much smaller value than 99.9% and …


vfs.zfs.arc_max is recognised, but legacy. More modern:

vfs.zfs.arc.max


Also, might one of the following be a better alternative?

vfs.zfs.arc_free_target

vfs.zfs.arc.sys_free