Quick reference for Prometheus Query Language (PromQL) with practical examples for monitoring, alerting, and SLO calculations. Covers essential functions, aggregations, and common patterns for effective Observability.

You’ve deployed the generated SLO rules to Prometheus - now what? The recording rules are pre-computing your SLO metrics every minute, but how do you actually check if you’re meeting your targets, monitor error budget consumption, or build dashboards? This guide shows you the essential PromQL queries to unlock the full power of your SLO monitoring, from checking current status to visualizing long-term trends.