Limit CPU Graphs in 2/3 framing

[robi]

From this discussion: https://forum.cloudron.io/topic/8476/cpu-usage-graph-on-system-info-page-show-20-of-whole-system-cpu-instead-of-single-core-cpu

It's not so useful to have a mostly empty graph. The useful point is to see activity and tune it for that purpose.

For example, I have 1 machine with 12 CPUs, so the graph looks like this:

Not useful.

The 2/3 design framing approach is like taking a picture that is aesthetically pleasing.
This means that any graph activity should occupy 2/3 of the graph with 1/3 reserved for headroom. This way we maintain a nice window of observability into the system and the graph dynamically resized to fit that window.

The same goes for memory. I'd like to be able to see memory usage that resembles what I see in top at a glance.

In the system memory graph above, it only shows 1 app and memory total.
Yet there are 50+ apps running!

Please make them observable.
That's why we have graphs.