I am using CentOS 6.4 on 4 servers, guests are also CentOS 6.4
Network is setup using virtio, and vhost, this works well but sometime I see connection issue from application to DB.
I found that sometimes latency increases from 0.200 ms approx to 123ms or even more sometimes, this happens only for 1-2 packets but keep happening after sometime.
CPU load remains under 1, CPU usages is around 20-30%.
If I ping from host machine to host machine then there is consistent latency, this only happens when ping from a guest machine to either other guest machines or a host machine.
Did anyone face similar issue?