Opensource.com - https://opensource.com/article/18/4/metrics-monitoring-and-python
My reaction when I first came across the terms counter and gauge and the graphs with colors and numbers labeled “mean” and “upper 90” was one of avoidance. It’s like I saw them, but I didn’t care because I didn’t understand them or how they might be useful. Since my job didn’t require me to pay attention to them, they remained ignored.
That was about two years ago. As I progressed in my career, I wanted to understand more about our network applications, and that is when I started learning about metrics.