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    Hi,

    I'm currently testing W2K12 Deduplication feature on some servers, and I was wondering if I could enable "Dynamic Memory" on the VM in Hyper-V? Because the job only uses percentage of memory for the dedup job, I guess it's not possible.

    Thanks in advance!

    Tuesday, August 6, 2013 2:36 PM

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    Hi,

    Yes it's avaible since 2008 R2, there was a misunderstanding; actually it was to know if the deduplication process inside a W2K12 Virtual Machine with "Dynamic Memory" enabled, will use all the dynamic memory or not.

    Just tested some days ago, and it doesn't work.

    • Marked as answer by 3magroup Tuesday, August 13, 2013 3:44 PM
    Tuesday, August 13, 2013 3:44 PM

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    Hi,

    Dynamic Memory is supported since Windows 2008 R2 so you could have a try on your Windows server 2012.

    Dynamic Memory Coming To Hyper-V
    http://blogs.technet.com/b/virtualization/archive/2010/03/18/dynamic-memory-coming-to-hyper-v.aspx

    TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tnmff@microsoft.com.

    Thursday, August 8, 2013 12:50 PM
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    Hi,

    Yes it's avaible since 2008 R2, there was a misunderstanding; actually it was to know if the deduplication process inside a W2K12 Virtual Machine with "Dynamic Memory" enabled, will use all the dynamic memory or not.

    Just tested some days ago, and it doesn't work.

    • Marked as answer by 3magroup Tuesday, August 13, 2013 3:44 PM
    Tuesday, August 13, 2013 3:44 PM
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    I know it old thread, but I ran into this and could not find anything on it but here, so I am adding my experience.

    I can concur with 3magroup...

    In my environment Windows Server 2012 with Dynamic Memory and Deduplication enabled, the HyperV does not release the driver locked ram for the dedup optimization. What resulted was an insane amount of paging and a painfully slow VM. Increasing the memory buffer for the dynamic memory did not cause the HyperV to release the memory for the dedup. Instead, it still "driver locked" nearly all of the ram, which did not make sense to me based on my understanding of the Memory Buffer setting.

    I can verify the VM poor performance and dedup using the paging file with the Resource Monitor, disk section, and the Driver locked RAM with RamMap.

    • Proposed as answer by Bryanwieg Wednesday, January 22, 2014 6:48 PM
    Wednesday, January 22, 2014 6:48 PM