Monitoring Metrics That Matter

Monitoring isn’t “collect everything.” It’s selecting the few signals that catch user-impacting problems early—and then drilling down with logs and traces.

The Four Golden Signals

Google’s SRE book recommends focusing on latency, traffic, errors, and saturation. It’s one of the best starting points for any hosting or platform environment: Monitoring Distributed Systems.

Metrics best practices (Prometheus)

If you’re using Prometheus, keep label cardinality under control and follow naming conventions. Official docs: Instrumentation practices and metric naming.

Observability beyond metrics

For full visibility, correlate metrics with traces and logs. OpenTelemetry is a vendor-neutral standard for telemetry signals: OpenTelemetry docs and signals overview.

What’s your current monitoring stack (Prometheus/Grafana, Datadog, etc.) and which metric has saved you the most?