Let's take a look at these views. Select one of the minion nodes and then scroll down to the detail section that appears below. By default, we should see the System: Overview by Process view (if it's not selected, just click on it from the list on the left-hand side). If the chart is hard to read, simply use the maximize icon in the top-left corner of each graph for a larger view.
There are a variety of interesting views to explore. Just to call out a few others, Services | HTTP Overview and Hosts & Containers | Overview by Container give us some great charts for inspection. In the latter view, we can see stats for CPU, memory, network, and file usage by container.