[Bug 275594] High CPU usage by arc_prune; analysis and fix

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 06 Feb 2024 21:35:29 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275594

Peter Much <pmc@citylink.dinoex.sub.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pmc@citylink.dinoex.sub.org

--- Comment #43 from Peter Much <pmc@citylink.dinoex.sub.org> ---
Just installed 13.3-BETA1, machine is doing effectively nothing:

System Memory:
        11.05%  864.11  MiB Active,     33.27%  2.54    GiB Inact
        28.36%  2.16    GiB Wired,      0.00%   0       Bytes Cache
        21.25%  1.62    GiB Free,       6.06%   474.05  MiB Gap

        Real Installed:                         8.00    GiB
        Real Available:                 98.15%  7.85    GiB
        Real Managed:                   97.22%  7.63    GiB

        Logical Total:                          8.00    GiB
        Logical Used:                   47.97%  3.84    GiB
        Logical Free:                   52.03%  4.16    GiB

ARC Size:                               3.49%   244.88  MiB
        Target Size: (Adaptive)         4.04%   283.59  MiB
        Min Size (Hard Limit):          3.58%   251.26  MiB
        Max Size (High Water):          27:1    6.85    GiB
        Compressed Data Size:                   160.01  MiB
        Decompressed Data Size:                 347.37  MiB
        Compression Factor:                     2.17

  PID USERNAME    PRI NICE   SIZE    RES STATE    C   TIME    WCPU COMMAND
    0 root         -8    -     0B    10M CPU2     2 406:21 100.00%
kernel{arc_prune}


This is not useable.

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