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  • 1.  Usable ram is less than allocated for the Virtual Machine

    Posted Oct 02, 2019 06:10 AM

    Hello,

    I have 2 physical servers running in a cluster environment. Yesterday I've upgraded RAM memory, allocating additional 64GB for each server. After upgrade I've increased RAM for one virtual machine on server 1 and did the same thing on another virtual machine on server 2. On server 1, the virtual machine running Windows Server 2012 using all RAM (45GB), but on server 2 the virtual machine is showing all allocated RAM (45GB) but is usable is only 29GB. Why does this happen, what I'm doing wrong?

    1. Both virtual machines host a Windows Server 2012 standard edition (same template).

    2. Windows is activated on both machines

    3. Vmware license: VMware vSphere 6 Essentials Plus Kit for 3 hosts License with 3 Years Support & Subscription

    Any help will be more than appreciated, thank you.



  • 2.  RE: Usable ram is less than allocated for the Virtual Machine

    Posted Oct 02, 2019 06:50 AM

    I've did some testings. On server 2 where is the VM that doesn't use all allocated RAM I allocated same memory (45GB) to another machine that used only 2GB and 2 CPU and there the OS is using all allocated RAM! I can confirm that both Windows systems are identical.



  • 3.  RE: Usable ram is less than allocated for the Virtual Machine
    Best Answer

    Posted Oct 02, 2019 07:49 AM

    Issue solved.

    msconfig -> boot -> Advanced options -> Maximum memory: uncheck.

    https://i.imgur.com/L2eDl2I.png