Glossary term
What is p99 (99th percentile)?
p99 stands for 99th percentile.
The value that 99 percent of observations fall under, so only the slowest 1 percent are worse.
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.