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  • performance query

    Am I interpretting the attached data correctly? (I can provide the full spreadsheet if requested..)


    This is an ML150 G6, with 4x2GB ram, a Xeon E5502, 2x160GB in Raid1 and 2x2TB in Raid1. It's a single SATA B110i Raid controller.

    SBS, Exchange including database and logs are on the first volume. There's almost no file activity apart from this, as they have a NAS for file access.
    Serving around 50 mailboxes at present, as well as AD.

    (data came from Naverisk, in case you're interested)

    Component Name Used Time Min Value Max Value

    CPU 33.3 29/11 00:27 1 100
    CPU 32.39 29/11 01:22 1 100
    CPU 27.19 29/11 02:16 1 100
    CPU 33.58 29/11 03:11 1 100
    CPU 25.88 29/11 04:05 1 100
    CPU 26.71 29/11 04:59 1 100
    CPU 31.94 29/11 05:54 1 100
    CPU 24.85 29/11 06:48 1 100

    PageFile 72.94 29/11 00:27 18.38 97.06
    PageFile 77.39 29/11 01:22 18.38 97.06
    PageFile 81.76 29/11 02:16 18.38 97.06
    PageFile 86.81 29/11 03:11 18.38 97.06
    PageFile 91.09 29/11 04:05 18.38 97.06
    PageFile 91.82 29/11 04:59 18.38 97.06
    PageFile 91.9 29/11 05:54 18.38 97.06
    PageFile 91.94 29/11 06:48 18.38 97.06

    DiskQueue 44.77 29/11 00:27 0 100
    DiskQueue 43.38 29/11 01:22 0 100
    DiskQueue 21.5 29/11 02:16 0 100
    DiskQueue 18.81 29/11 03:11 0 100
    DiskQueue 11.83 29/11 04:05 0 100
    DiskQueue 20.95 29/11 04:59 0 100
    DiskQueue 21.12 29/11 05:54 0 100
    DiskQueue 10.97 29/11 06:48 0 100


    The disk queue Total is almost persistently above 10, in fact the average is 21.21.
    watching the paage file, I can see at a reboot time, it went from 40% to 90% utilisation over 5 hours in the middle of the day.
    It then stayed there, until another reboot the next day, when the same symptoms occured.

    physical memory at boot starts at 65% utilisation. I know this is mostly normal with SBS - it'll take all the available memory.


    I believe they are memory-bound, and need more memory. Memory is depleted, which causes excess paging to occur, which thrashes the disk, all while Exchange is also trying to thrash the same set of spindles for logs and databases.



    The B110 is very much an entry level Raid adaptor imo. So it's this, or memory... and I'm leaning toward memory.

    moving the exchange logs to D: drive might buy a bit of head room.. but i think it's memory


    amiwrong ?
    Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

  • #2
    Re: performance query

    I assume this is SBS 2011?

    Get more RAM. At least 16GB. Also look at you AV tuning. Make sure it's scanning the right stuff and that it has enough threads to process the Exchange store.
    Regards,
    Jeremy

    Network Consultant/Engineer
    Baltimore - Washington area and beyond
    www.gma-cpa.com

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    • #3
      Re: performance query

      So what is the 2TB RAID partition doing? What is on there?
      TIA

      Steven Teiger [SBS-MVP(2003-2009)]
      http://www.wintra.co.il/
      sigpic
      Iím honoured to have been selected for the SMB 150 list for 2013. This is the third time in succession (no logo available for 2011) that I have been honoured with this award.

      We donít stop playing because we grow old, we grow old because we stop playing.

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