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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    We very much appreciate the kind feedback, and MAFoElffen did most of the heavy lifting here. :)

    As far as 24.04 LTS goes I'd wait it out for a few months after it's release before *any* upgrade...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    Yeppers that's a good spot MAFoElffen
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    What's heat like on all drives?

    I've had mine under a moderate load for a couple hours now:

    sudo smartctl -a /dev/nvme0n1p1 |grep Temperature
    Temperature: 32 Celsius...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    No the speed is not up to snuff, but we have nothing or nowhere to start so I prod and prod till something reveals the problem.

    And don't be sorry this how we help fix new or existing bugs...it...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    MAFoElffen has reported the same, and we are trying to find why.

    I get better write speeds in my /tank with btrfs.

    Run status group 0 (all jobs):
    WRITE: bw=225MiB/s (236MB/s),...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    Mine hasn't hit that yet:

    Run status group 0 (all jobs):
    WRITE: bw=2297MiB/s (2409MB/s), 2297MiB/s-2297MiB/s (2409MB/s-2409MB/s), io=10.0GiB (10.7GB), run=4458-4458msec

    I'm going to talk...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    :lolflag:
    Sometimes that's Soo True!
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    Looking pretty good so far.
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    That seems like a logical guess, but other things were happening before this, Right?
    Dang i hate to post and run, but I've got family in town to-nite.
    Hopefully MAFoElffen will see this. I'm...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    Interesting results, and I find reads are on average fairly close to consistent, but write speeds will vary, depending on a file or what's going on internally with the system.(system services)...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    Nice and sorry I missed your question in post#47 "So what is your minimum ARC setting?"
    Nothing fancy yet, until after the first of year...(I'm building a new machine) And I'm going with a Intel i9...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    Man Machine Interface Subsystem.
    And mine full-blown desktop XFCE firefox with 8 tabs open:

    free -m | grep ^Mem | tr -s ' ' | cut -d ' ' -f 3
    2685

    out of 16Gigs
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    I'm happy for you, that looks very decent.
    Sad to hear about the RAM though, but if they come through like they say, sounds like a happy ending.
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    Looking Good!
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    Ok lets talk Drive's again....:D

    Run status group 0 (all jobs):
    WRITE: bw=2318MiB/s (2431MB/s), 2318MiB/s-2318MiB/s (2431MB/s-2431MB/s), io=10.0GiB (10.7GB), run=4417-4417msec

    Big Difference...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    Complete information regarding to hardware, will always be lacking. :(
    You chose wisely. :)
    Please keep us updated, it helps others like myself for one, when considering new zfs hardware
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    My NMVe Drives, all have differences ie:

    /dev/nvme0n1 vendor: Western Digital model: WD Blue SN570 500GB

    It's a cheaper WD NMVE drive, and my speeds are much slower on write speed.

    Run...
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    [SOLVED] Re: Seemingly sporadic slow ZFS IO since 22.04

    My Interest as well:

    Run status group 0 (all jobs):
    WRITE: bw=1788MiB/s (1875MB/s), 1788MiB/s-1788MiB/s (1875MB/s-1875MB/s), io=10.0GiB (10.7GB), run=5728-5728msec

    Your Cap may come in to...
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