It execs scripts for each metric and stores the data using rrdtool. If you are only collecting a few metrics and use a 5 minute collection interval it's probab

It execs scripts for each metric and stores the data using rrdtool. If you are only collecting a few metrics and use a 5 minute collection interval it's probably fine. A while ago I switched from munin to prometheus+node_exporter and with that went from collecting metrics every 5 minutes to more metrics every 15 seconds. Munin is easy to operate initially. You can go from a script that outputs a number to a graph on your screen in a few minutes. It does get more complicated when you want to do something like graph the aggregate of a metric across a subset of machines. It is doable in the configuration, but a hell of a lot harder than just adding a widget in grafana and writing a simple promql query.