Then your problem is your libvirt is too old. It is the combination of qemu new enough to provide stats (qemu1.4; probably not present in the qemu shipped in CentOS, but present in your self-built 2.0) and libvirt new enough to read stats (v1.1.1 or newer; which is in RHEL 7.0, but not backported to the libvirt0.10.2 of RHEL6.5, and therefore not in your CentOS setup).
Eric could you please let me know how I can debug the exact reason of this issue? I've build qemu 2.0 and libvirt 1.2.5 for CentOS 6.5 x86_64 and I use 3.10.44 kernel from elrepo (kernel-lt). According to your words this environment should provide more memory statistic. Is there a way I can debug the call using gdb or some other tool? I do really need to get this working.
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