15.6 GB RAM (2.91 GB usable)

ManieyaK_
ManieyaK_ used Ask the Experts™
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We've got a VM running on Hyper-V, for some reason Installed memory (RAM):  15.6 GB  (2.97 GB Usable).  Usually when i see this it make's me think it's x86 or shared with GPU. On a VM I'm unsure of why the system limits the usable amount of RAM.
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Most Valuable Expert 2013

Commented:
Do you have Dynamic RAM set in the configuration of the VM?
ManieyaK_CSSP

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Commented:
yes dynamic memory is enabled.
Most Valuable Expert 2013
Commented:
This is telling the VM that there is a maximum of 16GB RAM but the Hot Add allocation in Hyper-V is making only what the guest needs available up to that limit.

So this is pretty much normal behaviour. If the Guest needs 16GB then Hyper-V will make it available but right now it needs less that 3GB so that's what's ready.

https://www.altaro.com/hyper-v/hyper-v-dynamic-memory-explanation-and-recommendations-2/
Philip ElderTechnical Architect - HA/Compute/Storage

Commented:
What is running in the guest?

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