Thanks. But I am using XEN. And I also don't want to go inside guest. I mean I want to get memory usage at the same level I am getting max memory and total memory. I have another question. If Memory attribute of GetDomainInfo gives total memory I.e. memory in use plus remaining memory than what is the use of Max Memory? I also programmatically updated Memory using libvirt function I.e. 1GB to 512mb. When tried to get domain statistics again I got Max Memory 512mb and Memory 1GB. How is this possible? <div class="gmail_quote">On Aug 5, 2016 6:36 PM, "Andrea Bolognani" <<a href="mailto:abologna@redhat.com">abologna@redhat.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Fri, 2016-08-05 at 17:45 +0500, Aleem Akhtar wrote: > Ok. So that's why I was getting 1 GB as a result. > So is there any way I can get memory in used programmatically? > I mean without going inside guest domain. The only way I can come up with at the moment relies on qemu-guest-agent: $ virsh qemu-agent-command guest \ '{"execute": "guest-exec", "arguments": {"path": "/usr/bin/free", "capture-output": true}}' {"return":{"pid":1425}} $ virsh qemu-agent-command guest \ '{"execute": "guest-exec-status", "arguments": {"pid": 1425}}' {"return":{"exitcode":0,"out-data":"ICA...zIK","exited":true}} $ echo 'ICA...zIK' | base64 -d total used free Mem: 4020408 97244 3359560 Swap: 1048572 0 1048572 Of course you'll need to have qemu-guest-agent running inside the guest and process all the resulting information yourself. See the virDomainQemuAgentCommand() API. -- Andrea Bolognani / Red Hat / Virtualization </blockquote></div>