I have an 8 node cluster running oVirt 4.4.2, i have noticed lately that some VMs started
to have their memory decrease.
For example a VM that was configured to have 32GB memory without any notice were had their
memory decrease to about 4GB, if i restart the VM the VM comes up with the correct memory
but shortly after it decreases again.
The VM configuration has:
Memory Size: 32768 MB
Maximum Memory: 131072 MB
Physical Memory Guaranteed: 1024 MB
It's worth mentioning that those are Linux VMs which are provisioned through Foreman,
Windows VMs are not provisioned from Foreman and their "Memory Size" is
identical to "Physical Memory Guaranteed", so far i have not observed a Windows
VM with this behaviour, though there might be some that i haven't caught.
Is there a possibility the cause for this issue is by having "Physical Memory
Guaranteed" set to this low?
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I think i'm answering my self :)
I noticed "mom.Controllers.Balloon - INFO - Ballooning guest" message in the
So best option to remove this and keep High Performance is disabling Memory Ballooning.