[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: Fri, 31 Oct 2025 14:36:50 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290207

--- Comment #21 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Mark Millard from comment #20)

I sent Mark Johnston the note:

QUOTE
Should the "vmstat -o" output for WIRED total to the likes of what top reports
for Wired?

I ask because:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290207

tried to diff before/after "vmstat -o" output for a over
1 GiByte size increase as seen in top and got just:

- 2368     0     0     0  2368   1   0 WB  ph
+ 2376     0     0     0  2376   1   0 WB  ph

for the "vmstat -o" output difference.

(  RES   ACT INACT LAUND WIRED REF SHD CM  TP PATH )
END QUOTE

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