We may have seen this as well. Initial speed tests were actually pretty good, but after running a few IO test it would actually cause the physical disks that were dedicated to the windows vm host side to be stuck at 100% util with no throughput for 30 seconds at a time according to iostat. We were using noop scheduler on the disks. I think it's something with your host, as we stopped seeing it when we moved from stock CentOS 6.5 kernel to vanilla 3.10 kernel. Sorry I don't have more info on the cause, we saw the issue for a few days but were already upgrading due to the need for vxlan, so we didn't bother investigating. On Tue, Feb 4, 2014 at 7:22 AM, XliN <saikov.vb@xxxxxxxxx> wrote: > Good day. Very little speed drives Virtio. Drivers are the latest guest on > the system "Windows server 2008". Host system centos 6.5. > > All that can be tried, but failed to increase the speed. And there I have a > database running. > > Screenshots test speed drives > > http://itmages.ru/image/view/1471772/feec35c3 > <http://itmages.ru/image/view/1471772/feec35c3> > http://itmages.ru/image/view/1471774/2b0baeae > <http://itmages.ru/image/view/1471774/2b0baeae> > http://itmages.ru/image/view/1471785/9fffb8f5 > <http://itmages.ru/image/view/1471785/9fffb8f5> > > Thanks in advance. Apply nowhere else. > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
