Wait Statistics -- Issue with Max IO Wait

  • Hi,

    We have SQL Server 2005 EE x64 with SP3 and I noticed that the Max IO wait is >25 ms for most of the time and it even going to 100 ms & more.

    I have analyzed the wait statistics and noticed that the below wait types have larger values:

    OLEDB

    PAGELATCH_EX

    SLEEP_TASK

    BACKUPIO

    CXPACKET

    ASYNC_NETWORK_IO

    Please see the attachment and could you please provide your inputs

    Thanks

  • Could you please advice!!

    Thanks

  • I don't typically open excel spreadsheets from people I don't know, but I can say that several of the things you list indicate unacceptable IO performance. More RAM could help. Dropping MAXDOP could remove the CXPACKET waits. Others could be due to slow client not processing data fast enough.

    I highly recommend you get a performance tuning professional on board for a few days for a review to help you identify and correct the root causes of your issues.

    Best,
    Kevin G. Boles
    SQL Server Consultant
    SQL MVP 2007-2012
    TheSQLGuru on googles mail service

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