[libvirt-users] Can you get page dirtying information on non-migrating VMs?
Daniel P. Berrange
berrange at redhat.com
Mon Apr 4 16:01:03 UTC 2016
On Mon, Apr 04, 2016 at 05:57:43PM +0200, tfcyundlim dehasawzdg wrote:
> Hello everyone,
>
> I've been looking through the libvirt API to get information about
> memory page dirtying of VMs. I need these to aid decisions on which VM
> to migrate.
> The only thing I found is
>
> virDomainGetJobStats()
>
> with
>
> VIR_DOMAIN_JOB_MEMORY_DIRTY_RATE
>
> but that only works when a migration is already running.
> Is there a way to get information on VMs which are not already migrating?
No, IIUC, page dirtying is only enbled by QEMU while migrating because it
has non-neglible performance impact on the guest.
Regards,
Daniel
--
|: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org -o- http://virt-manager.org :|
|: http://autobuild.org -o- http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
More information about the libvirt-users
mailing list