On Fri, 2012-09-14 at 16:55 +0300, Itamar Heim wrote: > On 09/14/2012 03:28 PM, John A. Sullivan III wrote: > ... > > >>> > > Moreover, all instances in memory only take the space of > >>> > >one instance. Thus, we get deduplication and KSM almost for free. > >> > > >> >oVirt (RHEV) runs KSM only when the host memory gets fuller but I seem > >> >to remember that guys were able to have high 1000's of % of memory > >> >overcommit ratios > > I have heard rumors of high CPU utilization with KSM but we have not > > experimented enough with it ourselves to know. Is that an issue? > > ksm takes cpu, but servers today are loaded with cores, but memory is > still the expensive part. > today we configure ksm to kick in only when memory is ~80%, which is > when you'd usually be willing to pay the price of one of your cores > spending some time on ksm, then the memory congestion on the host / > losing memory overcommit. That's where VServer is so great - we get the same results without the overhead. I assume oVirt does not change that part. Still, we are looking forward to exploring it as we really have no other option for Windows desktops and servers. Thanks - John _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/spice-devel