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Fibers

  • January 31, 2008 at 4:18 am

    #186242

    I dont know much about fibers, So before even considering enabling it are there any circumstances which it would be highly beneficial

  • January 31, 2008 at 4:37 am

    #773683

    Very few situations. iirc the only time you want to consider fibres is whn the CPUs are spending a large portion of their time doing context switches.

    A lot of stuff (extended procs, OPENXML) (I think) doesn't work properly in fibre mode

    Gail Shaw
    Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
    SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

    We walk in the dark places no others will enter
    We stand on the bridge and no one may pass

  • January 31, 2008 at 7:59 am

    #773755

    I have had a look at my pefmon counters, my system context switches/sec is avg 8800 and my thread context switch/sec is 8500. I have seen them both alot higher like around 10000. I have no idea if that is a lot? Is there an easy test to find out if my server is suffering from heavy context switching? Many thanks

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