# [OmniOS-discuss] intermittent SMB performance issues -- high NT Create AndX SRT

Geoff Nordli geoffn at gnaa.net
Wed May 25 16:11:48 UTC 2016

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    I just upgraded an OI server to Omniosr151018.

    I am having some intermittent issues with the smb service with Windows 7
    clients.

    Does anyone have a dtrace script/suggestions to try to isolate it.

    I am running wireshark one of the traces I have show SMB service
    response time for NT Create AndX calls is very high, with a avg of 24
    seconds.

    The other commands are good:
    Read AndX avg 0.0007
    Query_File_info avg:  0.000404
    Qeury_Path_Info avg 0.000512

    Network seems fine, iperf runs at wire speed.

    Large files through smb are at wire speed.

    I have tried both SMB and SMB2.

    iostat doesn't reveal any bad disks, nor are the disks busy, they are
    actually pretty idle.

    Pool is only at 30% full

    There is a 40GB arc, and the arc hit rate is very high, so everything
    really is in arc

    No dedup.

    thanks,

    Geoff

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