Memory allocation and ballooning for LXD VM clients

[samvde (Sam Van den Eynde)]

Hi,

I am trying to figure out how memory allocation is used for virtual machine targets on LXD ? Will the guest do some form of ballooning i.e. release non-used RAM to the host or will it reserve/allocate everything regardless ? Am I correct that “lxc info” does not provide this information (yet)?

I tried adding the virtio-balloon device using raw.qemu, but this produces this error:

qemu-system-x86_64: -device virtio-balloon-pci: Only one balloon device is supported

And hint or tips are most welcome

[tomp (Thomas Parrott)]

Take a look at

CPU burst : Windows VM

Hello, I have a windows VM running on a remote linux host. I need to know if there any possibility that the windows VM can use more CPU core ( for a shot period) than it reserved? Is there any way to allow CPU burst to the VM? Can you help me on this? Thank you!!

Despite the title it goes onto discuss memory ballooning.

[samvde (Sam Van den Eynde)]

Many thanks! I’ll have to test a bit more to see whether the guest releases it or not.

[capriciousduck (Krishna Chaitanya)]

Hi @samvde

So does the VM release the memory when it is not using it?