Performance issues on RHEL 5.8 KVM guest running on RHEL 6.3 hypervisor when compared to the same VMware guest.
Issue
-
Two servers, one performing okay and the other one performing poorly.
-
sar -u (past 6 hours)
** okay: vmware_guest01: user=1-3%, system=1-2%, iowait=< 0.1%
** poor: kvm_guest01: user=2-5%, system=1-5%, iowait=<0.04%,
Environment
- Red Hat Enterprise Linux (RHEL) 5.8 KVM guest
- RHEL 6.3 KVM hypervisor
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