On 10/16/2010 08:11 PM, Pasi Kärkkäinen wrote: > On Thu, Oct 14, 2010 at 02:16:42PM +0100, Bart Swedrowski wrote: >> Hi Karanbir, >> >> On 14 October 2010 19:59, Karanbir Singh<mail-lists at karan.org> wrote: >>> >>> On 10/14/2010 07:48 AM, Tom Bishop wrote: >>>> I think xen is still on top in terms of performance and features....now >>> >>> that is indeed what it 'feels' like, but I'm quite keen on putting some >>> numbers on that. >> >> I have done some testing some time ago on one of the EQ machines that >> I got from hetzner.de. Full spec of the machine was as following: >> >> * Intel® Core??? i7-920 >> * 8 GB DDR3 RAM >> * 2 x 750 GB SATA-II HDD >> >> It's nothing big but even though results are quite interesting. All >> tests were performed on CentOS 5.5 x86_64 with PostgreSQL 8.4 (from >> CentOS repos). >> > > Note that 64bit Xen guests should be HVM, not PV, for best performance. > Xen HVM guests obviously still need to have PV-on-HVM drivers installed. > > 32bit Xen guests can be PV. Hm, why would HVM be faster than PV for 64 bit guests? Regards, Dennis