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Storage subsystem Performance RRS feed

  • Question

  • How to find out that my storage subsystem performance is not a bottleneck for a particular system?

    What are the criteria which i must include in my system checklist?

    Monday, February 6, 2012 4:01 AM

All replies

  • Hi,

    not sure what exactly is requested.
    You can use some traceflags to check the disk nor file IO. 

    Best regards 


    RPA
    Monday, February 6, 2012 9:16 PM
  • Hi,

    not sure what exactly is requested.
    You can use some traceflags to check the disk nor file IO. 

    Best regards 


    RPA

    Hi RPA,

    THanks for your reply.

    on which basis i can say that IO is the main culprit for my poor server performance


    Thanks & Regards, Param - MCSE, CCNA ( http://paramgupta.blogspot.com )

    Saturday, February 11, 2012 9:51 AM
  • Hi All,

    on which basis i can say that IO is the main culprit for my poor server performance.

    Please guide me


    Thanks & Regards,
    Param
    MCSE, CCNA
    For Live Voice Discussion on any IT related issue, please vist my blog at
    www.paramgupta.blogspot.com

    Wednesday, February 15, 2012 5:25 AM
  • Hi Param,

    not easy to answer without knowing any details about the used hardware :).

    e.g. If you use IDE drives you will get lower disk IO by comparing with a SSD drive.

    For your specific issue I would start with a default trace from WPT.
    And within this trace I would start to check if any application consume disproportinate CPU / Disk resources.
    Or the memory is "allways" on swap action.

    Best regards

    Rainer


    RPA

    Friday, February 24, 2012 8:21 AM
  • Look at the top of the disk summary table to see the top processes using i/o.  You can also drag the Path column to the left and see the top path's using i/o.  You may be able to find the offending paths in the disk detail graph, by hovering the mouse over different areas.  (Typically it's the $Mft and the catroot, or a virus information file.)

    Drive seeking is the #1 performance problem.  When disk utilization is at 100%, disk operations can take 10x longer.




    • Edited by JS2010 Monday, March 5, 2012 5:27 PM
    Monday, March 5, 2012 5:21 PM