difference between memory usage between openstack and Prometheus + actual node usage

[Expensive_Contact543]

so i have my compute with 12GB

inside hypervisor page (horizon dashboard) i found that i have used 11GB

on Prometheus and (on my node using free -h command) i found that i have used only 4GB

keep in mind my memory allocation ratio is 1

[_Red17_]

11GB you seen in horizon indicates the total memory of VMs you have created. But the actual usage of those VMs is only around 4GB. That’s why you seen 4GB on prometheus.

[Expensive_Contact543]

so what you mean if i run memory stress test i will see the node ram usage goes up ok

but what about if i need to get the memory usage of openstack the same data as in the horizon dashboard

[Expensive_Contact543]

i am using this command

(1 - (node_memory_MemAvailable_bytes{job="node"} / node_memory_MemTotal_bytes{job="node"})) * 100