Virtual Machine Memory Warning

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discoveranother

New Member
Aug 16, 2018
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Hi all,

Have two virtual machines on a hyperv server core. Using 5Nine Manager for HyperV shows one of the VMs has a memory warning, is it simply a case of needing to increase the memory allocated to the VM ?

The total memory the hyperv core has installed is 16GB, one of the VMs is using most of this memory, I want to assign extra memory to the other VM.

The VM using most of the memory is a VM running an application database, the other VM is the DC.

Both use dynamic memory.

Thanks all
 

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LaMerk

Member
Jun 13, 2017
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It looks like you have used all RAM installed on the host. Check RAM usage inside VMs and decrease memory allocation for VM to keep some RAM for the Hyper-V Core OS .
Also, check event logs for the messages from Hyper-V to address warning message in 5nine.
 

discoveranother

New Member
Aug 16, 2018
3
0
1
It looks like you have used all RAM installed on the host. Check RAM usage inside VMs and decrease memory allocation for VM to keep some RAM for the Hyper-V Core OS .
Also, check event logs for the messages from Hyper-V to address warning message in 5nine.

Thank you. Would it be best to change to static memory or remain with dynamic ?

Any thoughts appreciated.
 

Nizmo

Member
Jan 24, 2018
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Thanks. I've read many articles on static vs dynamic, they seem to favour dynamic !!! But i'd be happy to try static and allocate a fixed amount to each VM and try it out.
With larger amounts of ram Dynamic is best. You could assign a min. 4GB and a Max of 6GB to each VM.
 

weust

Active Member
Aug 15, 2014
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Default with Dynamic RAM is to use something like 1TB in kilobytes or bytes?
What Nizmo mentions is best, set a minimum (keep in mind that 1024MB is kinda minimum for iirc 2012 R2+) and a max.
The Guest OS may then run out of RAM, but not your Host.