Re: [libvirt] How to get VM memory usage

ForwardedMessage.eml Subject: Re: Re: [libvirt] How to get VM memory usage From: &quot;wangyufeng(a)cloudguarding.com&quot; <wangyufeng(a)cloudguarding.com&gt; Date: 04/26/2017 01:21 AM To: "Daniel P. Berrange" <berrange(a)redhat.com&gt; CC: libvir-list <libvir-list(a)redhat.com&gt; Hi Daniel, I found method MemoryStats in domain.go: func (d *Domain) MemoryStats(nrStats uint32, flags uint32) ([]DomainMemoryStat, error) { ptr := make([]C.virDomainMemoryStatStruct, nrStats) result := C.virDomainMemoryStats( d.ptr, (C.virDomainMemoryStatPtr)(unsafe.Pointer(&ptr[0])), C.uint(nrStats), C.uint(flags)) if result == -1 { return []DomainMemoryStat{}, GetLastError() } out := make([]DomainMemoryStat, result) for i := 0; i < int(result); i++ { out = append(out, DomainMemoryStat{ Tag: int32(ptr[i].tag), Val: uint64(ptr[i].val), }) } return out, nil } Do you mean this method can get used memory info? While I invoke the method, which can only get values of tag 0 and tag 6: And the balloon driver have been activated on the monitored vm: Below is my code, could you tell me what's wrong with my code? Thank you very much. ---------------------------------------------------------------------------------------------------------- On Fri, Apr 21, 2017 at 09:58:12AM +0800, wangyufeng(a)cloudguarding.com wrote: > Hi Daniel, > > In method 'GetInfo', we can only get memory and max memory. However I > need to get used memory for calculating memory usage. The virsh command > 'dommemstat' can obtain used memory, is there a method in libvirt-go to > obtain used memory? That command uses the virDomainMemoryStats() API call Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|