# [OmniOS-discuss] crash dump speed painfully slow

Schweiss, Chip chip at innovates.com
Wed Nov 5 20:31:08 UTC 2014

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    I had a system crash this morning when I/O on a pool was hung with
    failmode=panic.

    That was 7 1/2 hours ago and it's at 64%.    I'm going to let it complete
    so the failure can be analyzed more, but I really need to find a way to
    significantly speed up the crash dumps.

    This system has 256GB ram and a dedicated dump pool of two 320GB mirrored
    SATA disks.

    I'm aware of the multi-threaded dump issue so I have these to lines in
    /etc/system

    set dump_plat_mincpu=0
    set dump_bzip2_level=1

    It's not clear where the bottleneck is.  I don't think it's the disk.  The
    disk activity lights are a light flicker, by no means being hit hard.
    Unless it's a serial latency issue.

    What would be my best approach to get good dumps from a system like this in
    minutes, not hours?   Assuming that is possible.

    Thanks!
    -Chip
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