Ballooning device problems

[cshifer12]

I have 64 GB RAM and 2 VMs with 20 GB each. The problem is that if i enable balloon device for these VMs it somehow does not work.

Both VMs are debian, they both have virtio balloon driver installed. When i configure minimum 8 GB and max 20 GB. Whenever inside VM usage is 8 GB it slows down a lot. I had to turn off balloon and it uses all 40 GB right away.

 

[Sviat]

Hi,

Did you have QEMU guest agent installed and running inside the VM?
It can improves communication between host and guest for ballooning decisions.