Horizon didn't show all active VMs

[Aleksandr Shaposhnikov]

Basically I have more than 12k of active VM's in my env. Horizon dashboard, Admin/System/Overview tab shows that there only 4089 of them and only 1Tb of RAM used. That isn't correct info about a cloud.
When number of VMs was low that 4k I've constantly seen a bug https://bugs.launchpad.net/bugs/1278819 also.
Assuming that stats aren't online I waited about 2 days but nothing was changed regarding that. Still 4089 VMs.

But if you go to the project itself and open overview page with all usage statistics then it will show correct number of VMs, Cores, RAM for this project.

So steps to reproduce:
1. Get cloud with at least 5k VMs (looks like).
2. Take a look on stats.

Expected behavior:
All VM's should be reflected in counters.

Observed behavior:
Not all of the VMs was taken into the consideration.

[Timur Sufiev (tsufiev-x)]

Upstream bug is https://bugs.launchpad.net/horizon/+bug/1447976

[Timur Sufiev (tsufiev-x)]

Moving to 8.0 due to lack of resources.

[Paul Karikh (pkarikh)]

I've tried to reproduce this issue with devstack and Nova fake drivers. With >6K instances Horizon shows correct data.
Also I can't find any place where Horizon manipulates the data it recieved from Nova.
So I'm setting this bug Incomplete.

[Timur Sufiev (tsufiev-x)]

As agreed with Aleksandr, waiting until he hits the same issue again.

[Roman Podoliaka (rpodolyaka)]

Moving to Invalid as this hasn't been reproduced in a month.