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....usage_in_bytes libvirt/qemu/i-000009fa libvirt/qemu/i-000009fa: memory.limit_in_bytes: 13215727616 memory.usage_in_bytes: 12998287360 The 4G difference is the cache. That's why I'm so interested in what is consuming the cache on a VM which should be caching in guest only. Regards, Brano Zarnovican

..... # echo 3 > /proc/sys/vm/drop_caches # ..cache associated to the instance drops too. # cgget -r memory.stat libvirt/qemu/i-000009fa libvirt/qemu/i-000009fa: memory.stat: cache 122880 rss 8674291712 ... Can somebody explain what is cached, if there is cache=none everywhere ? Thanks, Brano Zarnovican PS: versions: Scientific Linux release 6.4 (Carbon) kernel-2.6.32-358.11.1.el6.x86_64 qemu-kvm-0.12.1.2-2.355.el6_4.5.x86_64 libvirt-0.10.2-18.el6_4.5.x86_64

On 08/08/2013 05:03 PM, Brano Zarnovican wrote: > On Thu, Aug 8, 2013 at 9:39 AM, Martin Kletzander <mkletzan@redhat.com> wrote: >> At first let me explain that libvirt is not ignoring the cache=none. >> This is propagated to qemu as a parameter for it's disk. From qemu's >> POV (anyone feel free to cor...

On 09.08.2013 13:39, Martin Kletzander wrote: > On 08/08/2013 05:03 PM, Brano Zarnovican wrote: >> On Thu, Aug 8, 2013 at 9:39 AM, Martin Kletzander <mkletzan@redhat.com> wrote: >>> At first let me explain that libvirt is not ignoring the cache=none. >>> This is propagated to qemu as a parameter for it's disk. From qemu's >>> POV (anyone...

On 08/07/2013 02:24 PM, Brano Zarnovican wrote: > Hi, > > I have an instance with 8G ram assigned. All block devices have cache > disabled (cache=none) on host. However, cgroup is reporting 4G of > cache associated to the instance (on host) > > # cgget -r memory.stat libvirt/qemu/i-000009fa > libvirt/qemu/i-00000...