What is system monitor memory % actually measuring?

Installation Home Assistant OS
1

This integration:

reports 4% CPU use and 13.8% memory use.

However adding up all the container usage I get: 1% CPU use (or 4% if you ignore the number of processors) and 27.6% Memory use.

If I only count the core use I get 0.67% CPU and 4.2% memory use.

So the CPU seems obvious, it is a total CPU use, ignoring summing the number of processors.

But what the heck is this integration actually measuring in regards to memory percent?

2

I’d also like to know the same thing about CPU use as well.

I see occasional spikes up to around 60% CPU use according to system monitor. and that spike last for anywhere from 8-9 minutes every single time. But it’s not regular when it happens. It happens anywhere from 30 minutes to 2.5 hours apart.

I always thought it was from stuff outside of HA (I run a Kodi medfia server as well) but the recent discussions make me think that it is something that HA is doing buut I can’t figure out where it’s coming from.

So is the CPU usage only related to HA processes or is system wide?

Sorry, not trying to hijack the thread but I figure it’s related.

3

System wide (for a Home Assistant OS install it includes all containers, cant comment on other install methods) but, if you have a multi core processor it measures the sum of all cores. So 60% CPU use on a 2 core 4 thread processor (the maximum use you could see on that system would be 400%) is only really using 15% of the total available resources.

4

Also this will change with the next supervisor release. No longer need to divide the value by the number of cores:

Still don’t know what System Monitor memory_percent is measuring.

5

I don’t run HassOS so I guess I still don’t really know for sure.

Thanks for the info tho.