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ndemou
Asked: 2020-10-20 22:47:05 +0800 CST

Windows under KVM hypervisor, constant swaping and a lot of unused RAM

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I'm running windows server 2012 VMs with plenty of RAM assigned under Linux KVM. All 4 servers show almost 0% available memory and do a lot of swaping. The RAM used by applications doesn't add up to even half the assigned RAM. Installing RAMMAP.exe I noticed about 60% or RAM appearing as "driver locked".

What's happening?

kvm-virtualization windows-server-2012-r2

1 Answers

  1. Best Answer

    It turns out that if I use virsh edit to set both the CurrentMemory and Memory properties of the VM to an equal amount[1] "driver locked" memory disappears, free memory appears and swaping stops!

     <memory unit='KiB'>3670016</memory>
 <currentMemory unit='KiB'>3670016</currentMemory>

    [1] and by the way a multiple of 1024, although I don't believe this matters.

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