On Fri, May 21, 2010 at 09:40:18PM -0500, Neil Aggarwal wrote: Basically you need to look at whether the stats are available in libvirt. For example on my (Fedora) host: # virsh domifstat F13x64 vnet0 vnet0 rx_bytes 30105725 vnet0 rx_packets 31983 vnet0 rx_errs 0 vnet0 rx_drop 0 vnet0 tx_bytes 1252853 vnet0 tx_packets 13921 vnet0 tx_errs 0 vnet0 tx_drop 0 # virsh domblkstat F13x64 hda hda rd_req 13545 hda rd_bytes 341982208 hda wr_req 9968 hda wr_bytes 206386176 I also tried this on a CentOS 5.4 machine, and I think there is a bug in libvirt because I get some strangely inconsistent results from these commands (as in, sometimes they run and sometimes they fail, randomly AFAICT). It's quite possible that the version of libvirt in RHEL 5 doesn't fully support these stats, and I'm pretty sure we don't test network and block stats (since we never provided or supported virt-top in RHEL 5, so we don't need it to). RHEL 6 will ship with a fully supported virt-top command. Followups set to virt-tools-list. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html