[Bug 290207] [ZFS] lowering "vfs.zfs.arc.max" to a low value causes kernel threads of "arc_evict" to use 91% CPU and disks to wait. System gets unresponsive...

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 02 Nov 2025 18:00:29 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290207

--- Comment #30 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Mark Millard from comment #29)

Looks like the count of "vm pgcache" lines is
tied to how many NUMA domains there are.

But in my context:

# sysctl vm.ndomains
vm.ndomains: 1

gets 2 lines of "vm pgcache" vmstat -z output
for some reason.

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