[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] How much memory does a domain REALLY use...
Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote: > On 24/2/07 19:14, "Graham, Simon" <Simon.Graham@xxxxxxxxxxx> wrote: > > > Hmm - it does indeed seem to be somewhat dependent on the size of the > > machine; I have a bunch of systems from 2GB to 16GB all of which are > > running a 768MB Dom0 currently; here's what I see for used memory > > (total/free as reported by xenstat) for some of these when just Dom0 is > > running: > > > > . 2GB system; 794MB used > > . 6GB system; 830MB used > > . 8GB system; 840MB used > > . 16GB system; 890MB used > > Yes, there's an overhead of 7MB per 1GB on i386, and 12MB per 1GB > on x86/64. Some time ago (xen 3.0.2 I think) I measured the overhead on i386 to be 12 MB per domain plus 6MB per GB host RAM I guess it has gone up since the above figures fit the 7MB amount much better >>> for total in (2, 6, 8, 16): print "Total",total,"Calculated >>> used",total*7+12+768 ... Total 2 Calculated used 794 Total 6 Calculated used 822 Total 8 Calculated used 836 Total 16 Calculated used 892 -- Nick Craig-Wood <nick@xxxxxxxxxxxxxx> -- http://www.craig-wood.com/nick _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |