Windows Hyper-V ran out of memory

Question

I have a Windows 2016 Hyper-V machine that holds a Linux VM. The link VM is running at 12GB RAM and I want to increase that. When I try to increase it is says it ran out of memory.

There is 12 GB Free on server
All windows updates are installed
I can create another VM with 6 GB of RAM and it starts up fine; I just can't add it to this VM. I can't even add 2 GB to the VM in question.
Numa is off.
Guest Services is installed.

Any suggestions? I have read countless forums but can not resolve the issue.

Thank you.

Try to enable Numa Spanning in Hyper-V settings. – batistuta09 Sep 25 '18 at 09:24 — batistuta09, Sep 25 '18 at 09:24
I have Numa disabled in the Linux OS. Does that matter? – Chris Sep 25 '18 at 20:02 — Chris, Sep 25 '18 at 20:02
He is referring to the Hyper-V host, not the guest. – Michael Hampton Sep 28 '18 at 17:08 — Michael Hampton, Sep 28 '18 at 17:08

A.Newgate · Answer 1 · 2018-09-28T11:34:22.727

6

Check the NUMA spanning in Hyper-V settings. Looks like you tried to assign more RAM memory that you have on a single NUMA. By enabling this option you will be able to assign more memory to the VM! https://www.starwindsoftware.com/blog/a-closer-look-at-numa-spanning-and-virtual-numa-settings

edited Sep 28 '18 at 11:34

answered Sep 27 '18 at 16:29

A.Newgate

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Can I have the Hyper-V host have Numa spanning and the Linux Guest have it turned off and not run into any issues? – Chris Sep 29 '18 at 22:26
1

Sure. But why should you enable NUMA spanning and do not use it? – A.Newgate Oct 16 '18 at 08:09

Windows Hyper-V ran out of memory

1 Answers1