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/1471774/2b0baeae
http://itmages.ru/image/view/1471785/9fffb8f5

Thanks in advance. Apply nowhere else.