A gauge is a Prometheus metric whose value can rise or fall, making it suitable for tracking a current level such as application memory consumption. section 3.5
In a monitored application, gauges are exposed through a /metrics endpoint, scraped by Prometheus, and visualized in Grafana alongside counters and histograms. section 3.5
Operational monitoring pipeline
Expose application metrics, configure Kubernetes scraping annotations, verify the target in Prometheus, and query the resulting values before building Grafana dashboards or alerts. section 3.5
