Re: 13-STABLE high idprio load gives poor responsiveness and excessive CPU time per task

In reply to: Edward Sanford Sutton, III: "13-STABLE high idprio load gives poor responsiveness and excessive CPU time per task"
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From: Eugene Grosbein <eugen_at_grosbein.net>
Date: Tue, 27 Feb 2024 20:03:11 UTC

27.02.2024 7:24, Edward Sanford Sutton, III wrote:

[skip]

> More recently looked and see top showing threads+system processes shows
> I have one core getting 100% cpu for kernel{arc_prune} which has 21.2 hours over a 2 hour 23 minute uptime.

Against this bug, try these two:

sysctl vfs.zfs.arc.meta_strategy=0
sysctl vfs.zfs.arc.meta_limit_percent=25

Note that in 14.0 ZFS changed a lot and no more has sysctl vfs.zfs.arc.meta_strategy,
also it did not exist in FreeBSD 12.x, too.

Eugene Grosbein