At Wed, 12 Mar 2014 13:36:50 +0100, Pasquale Dir wrote:
Hello, I need to get how much memory is used by a guest system, in order to implement some monitoring function which tells me if the system is overstressed.
I am currently using java apis and the binding which was suggested to me was Domain.memoryStats();
This is a binding to int virDomainMemoryStats (virDomainPtr<http://libvirt.org/html/libvirt-libvirt.html#virDomainPtr>dom, virDomainMemoryStatPtr<http://libvirt.org/html/libvirt-libvirt.html#virDomainMemoryStatPtr>stats, unsigned int nr_stats, unsigned int flags).
Problem is that it returns me just tags 0,6 and 7. Looking at the documentation I see they are not what I am looking for...I would rather need 4 (VIR_DOMAIN_MEMORY_STAT_UNUSED) and 5 (VIR_DOMAIN_MEMORY_STAT_AVAILABLE).
The information available depends on the kind of hypervisor you're using and which guest OS you have. I guess you're using qemu. Which version are you using? What guest OS do you use? Which version? What's the version number of the balloon driver inside your guest? [ideally, you should always provide at least the hypervisor and guest OS information without us having to ask you]