Glossary term
What is recording rule? Meaning for developers
A saved PromQL query whose result Prometheus stores as a new metric so later queries stay short and fast.
Learn it properly · Observability & SRELesson 2: Metrics and Prometheus: Counters, Gauges, Histograms and PercentilesThe metric types, labels and cardinality, why averages lie, percentiles, and a real Prometheus scrape of a Node service.