When looking at RAM usage, the number I've always cared the most about is the number from the "used" column and "-/+ buffers/cache" row when I run the "free" command. Like:

I don't see any graph that looks like it contains that information. I see the memory pool graph, but it show much higher usage that I actually have because of how Linux manages RAM.

So, any thoughts on how I could get Observium to graph what I want?

Thanks!