Re: [libvirt] Libvirt's DomainGetInfo Function Development

On Fri, 2016-08-05 at 18:49 +0500, Aleem Akhtar wrote: > Thanks. > But I am using XEN. I see. qemu-guest-agent is definitely not an option then. > 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. The problem with that is that the host OS has zero knowledge of how the guest OS is using the memory it's been assigned.

> 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? You can configure your guest like   <memory unit='KiB'>4194304</memory>   <currentMemory unit='KiB'>2097152</currentMemory> Doing so would give you 2 GB of initial memory and the ability to increase that up to 4 GB at runtime. So in the virDomainInfo structure, maxMem corresponds to <memory> and memory corresponds to <currentMemory>. Confusing, I know :) > 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? You mean memory = 512 MB and maxMem = 1 GB, right? PS: This whole thread would have been more suitable for the     libvirt-users mailing list - libvir-devel is targeted at     the development of libvirt itself. Not a big deal, but     maybe keep that in mind the next time :) --  Andrea Bolognani / Red Hat / Virtualization -- libvir-list mailing list libvir-list(a)redhat.com https://www.redhat.com/mailman/listinfo/libvir-list