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  • [RC7] High memory usage - ARC ZFS relative

    • Solved Minor



    I'm currently running the rc7 version of unraid 6.12.

    My system seems to be very instable since the update (I was on rc6 without any issue).

       - GUI stop working correctly (no more realtime monitoring on the dashboard after few minutes).

       - Memory usage is very high

       - Arc limit size seems to not be taking in account (set at 1/8 of max memory, so 8 gig for 64 gig) using 24 gig after few hour on 64gig (see files).



    cat /boot/config/modprobe.d/zfs.conf
          options zfs zfs_arc_max=8589934592


    cat /etc/modprobe.d/zfs.conf
            options zfs zfs_arc_max=8589934592




    cat /proc/spl/kstat/zfs/arcstats

              size                            4    17698968720



    Diag file attached.


    Thx for the help.

    arc_size_15minutes.txt arc_size_30minutes.txt arc_size_few_hours.txt nas-icarus-diagnostics-20230611-0046.zip

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    25 minutes ago, JorgeB said:

    This should be fixed in rc8, please re-test.

    Updated to rc8.


    /sys/module/zfs/parameters/zfs_arc_max is now set with the right value = 8589934592


    Before it was set at 0 (so no limit?)


    Wait & see :)


    • Like 1
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    10H after update to rc8.

    Problem seems to be solved.


    From cat /proc/spl/kstat/zfs/arcstats
    		size     4    8589645536 


    Thx ;)

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