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Date:      Thu, 07 Dec 2017 05:25:29 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-fs@FreeBSD.org
Subject:   [Bug 224080] ZFS: "arc_dnlc_evicts_thr" + "arc_reclaim_thread" - high CPU load during poudriere build...
Message-ID:  <bug-224080-3630-MI9kZlhYp1@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-224080-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-224080-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224080

--- Comment #10 from Cy Schubert <cy@FreeBSD.org> ---
During a buildworld -DNO_CLEAN (second machine):

                       Total     MFU     MRU    Anon     Hdr   L2Hdr   Other
     ZFS ARC           2001M    464M   1300M   8695K     30M      0K    198M

                                rate    hits  misses   total hits total mis=
ses
     arcstats                  : 71%     660     258       274342       697=
629
     arcstats.demand_data      : 67%     218     107        96070        81=
229
     arcstats.demand_metadata  : 25%      44     129        43412       569=
950
     arcstats.prefetch_data    :  0%       0      22        10019        27=
947
     arcstats.prefetch_metadata:100%     398       0       124841        18=
503
     zfetchstats               :  4%      99    2013        28345      3844=
648
     arcstats.l2               :  0%       0       0            0          =
  0
     vdev_cache_stats          : 58%       7       5         9786        19=
927



I'm getting pretty healty hit rates where as with r326347 the hit rates wer=
e in
the low single digits.

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