Host memory is not collected.

[MyungChi]

Hi.

I set new machine in lab env. There are no active VM in KVM. At that time ram information for Host is not collected.

$ kvmtop --cpu --mem --printer=json
{ "host": {"ram_Total": "","ram_Free": "","ram_Available": "","cpu_cores": 10,"cpu_curfreq": 0.000000}, "domains": []}
{ "host": {"ram_Total": "","ram_Free": "","ram_Available": "","cpu_cores": 10,"cpu_curfreq": 0.000000}, "domains": []}
{ "host": {"ram_Total": "","ram_Free": "","ram_Available": "","cpu_cores": 10,"cpu_curfreq": 0.000000}, "domains": []}
{ "host": {"ram_Total": "","ram_Free": "","ram_Available": "","cpu_cores": 10,"cpu_curfreq": 0.000000}, "domains": []}
{ "host": {"ram_Total": "","ram_Free": "","ram_Available": "","cpu_cores": 10,"cpu_curfreq": 0.000000}, "domains": []}
{ "host": {"ram_Total": "","ram_Free": "","ram_Available": "","cpu_cores": 10,"cpu_curfreq": 0.000000}, "domains": []}
{ "host": {"ram_Total": "","ram_Free": "","ram_Available": "","cpu_cores": 10,"cpu_curfreq": 0.000000}, "domains": []}

If I check with virsh command, result is as below.

virsh nodememstats

total : 197639624 KiB
free : 124508044 KiB
buffers: 2136 KiB
cached : 53727560 KiB

[cha87de]

Thanks for reporting, @MyungChi .
so the host memory measurements are not available (only) when the host has no VMs?

[MyungChi]

Yes, host has VM, mem info is collected.

[MyungChi]

Do U need any other extra info.?

[cha87de]

i didn't had the time to look into that issue yet. since i'm not paid for kvmtop so what is needed is spare time or even better a fix for the problem :-)

[igalvarez]

Hi, dont know if my issue is the same, but I'm unabled to collect mem. See image atached. Let me know if you need some other info. 👍

Thanks

[cha87de]

Hi @igalvarez
can you please check if you have the qemu guest agent installed on those VMs which have memory reported, and that this agent is missing on the other VMs?
If this is the case, your issue is related to #27 .
Thanks!

[cha87de]

@MyungChi The bug you described is related to the fact, that the kvmtop collectors' Collect method is only called then there are VMs .. This has to be fixed for host metrics.