Practical uses
- Monitor Kubernetes containers and pods.
- Collect application metrics (CPU, memory, etc.).
- Trigger alerts on performance thresholds.
- Analyze historical performance trends.
Pros and cons
What Prometheus does especially well — and the limits to anticipate.
Pros
- Completely free and open source.
- De facto standard for Kubernetes monitoring.
- PromQL very powerful for complex queries.
- Simple, lightweight deployment.
Cons
- Requires DevOps expertise for production.
- Self-hosted so maintenance/infrastructure on you.
- Fewer native visualizations vs. Grafana.
- Data retention limited by disk space.
Prometheus: when it makes sense.
Prometheus fits cloud-native orgs with DevOps teams; for others, Datadog or New Relic suit better.
Keep if
You use Kubernetes or cloud-native infrastructure.. You want open-source monitoring with no fees.
Challenge if
You seek a fully managed SaaS solution.. You lack DevOps expertise to deploy Prometheus.
