On 07/03/2014 08:29 AM, Gleb Voronich wrote: >> Eric Blake <mailto:eblake@xxxxxxxxxx> >> > >> > 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? virDomainMemoryStats() gets those stats, if qemu is new enough to provide them, and if the guest cooperates to provide them. >> >> 2. I've tried the latest QEMU GA 2.0.0 Right now, there are no memory stats available through the guest agent, only through the balloon device. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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