Eric Blake <mailto:eblake@redhat.com>
In the case of the memory balloon device, libvirt CAN provide stats from the guest, because of the way the balloon device works. But if you aren't using a balloon, or if the guest is not cooperative, this won't work. Better would be a guest-agent command for getting at this information (but again, you are relying on guest cooperation). In short, libvirt is great at stats from the HOST point of view, but for stats from the GUEST point of view, you are often better off using the same mechanisms that you would for getting stats from a remote bare metal machine, without needing libvirt in the mix.
Thanks Eric. 1. I use the balloon for all of my guests: <memballoon model='virtio'> But how can I get stats? 2. I've tried the latest QEMU GA 2.0.0
