2012 HYPER-V RAM Usage

Posted on 2014-10-29
Last Modified: 2014-12-11
I have a hyper-v cluster with 3 2012 nodes. One of the nodes is reporting to be using 97% of RAM.

- There is 250gb of RAM on the server.
- The VMs on this host only amount to 100gb of RAM
- The server itself only appears to be using 6gb.

For whatever reason, I am finding it close to impossible to account for all RAM usage. Resource monitor doesnt help here either

Question by:Lamont77
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LVL 20

Expert Comment

ID: 40412104
Any backup jobs running?
Are all host the same make, model and config?
LVL 39

Expert Comment

by:Philip Elder
ID: 40412285
What monitoring app is flagging 97% RAM usage?

Accepted Solution

Lamont77 earned 0 total points
ID: 40482617
It was cached memory that was eating it all and after logging with MS they have identified this as a memory leak that is a known issue with Hyper-v. We have applied their patch and everything is looking normal now.
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LVL 39

Expert Comment

by:Philip Elder
ID: 40483216
What is the hotfix number please?

Author Closing Comment

ID: 40490895
None of the other answers were right
LVL 39

Expert Comment

by:Philip Elder
ID: 40491540
What was the hotfix number please? I would like to research the problem (I'm a Cluster MVP that builds Hyper-V clusters).

Author Comment

ID: 40493303
Here it is. I think it's been released into the wild now so if your new Hyper-V installation is fully patched you shouldn't see any of the issues we did:

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