Observability - Metrics

Concepts

Concepts - Sum (opens in a new tab)

Concepts - Gauge (opens in a new tab)

A sampled value at a given time. Gauges do not provide an aggregation semantic. Instead, they provide a last sample value. For this reason, the startTime is not meaningful for gauges; instead, it is a point event associated with endTimestamp,

Prometheus

Troubleshoot scraping

Use $PROMETHEUS_HOST:9090/targets to verify that the target is up and running.

Grafana Mimir

Mimir - HTTP API Reference

Grafana Mimir HTTP API (opens in a new tab)

Mimir - Health check

GET :9009/ready
❯ http :9009/ready
HTTP/1.1 200 OK
Content-Length: 5
Content-Type: text/plain
Date: Fri, 03 Oct 2025 16:24:10 GMT
 
ready

VictoriaMetrics

VictoriaMetrics datasource for Grafana

PCP (Performance Co-Pilot)

Observability - LoggingDatabase - Time Series