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courses/level101/metrics_and_monitoring/conclusion.md

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+# Conclusion
+
+A robust monitoring and alerting system is necessary for maintaining and
+troubleshooting a system. A dashboard with key metrics can give you an
+overview of service performance, all in one place. Well-defined alerts
+(with realistic thresholds and notifications) further enable you to
+quickly identify any anomalies in the service infrastructure and in
+resource saturation. By taking necessary actions, you can avoid any
+service degradations and decrease MTTD for service breakdowns.
+
+In addition to in-house monitoring, monitoring real user experience can
+help you to understand service performance as perceived by the users.
+Many modules are involved in serving the user, and most of them are out
+of your control. Therefore, you need to have real-user monitoring in
+place.
+
+Metrics give very abstract details on service performance. To get a
+better understanding of the system and for faster recovery during
+incidents, you might want to implement the other two pillars of
+observability: logs and tracing. Logs and trace data can help you
+understand what led to service failure or degradation.
+
+Following are some resources to learn more about monitoring and
+observability:
+
+-   [Google SRE book: Monitoring Distributed
+     Systems](https://sre.google/sre-book/monitoring-distributed-systems/)
+
+-   [Mastering Distributed Tracing by Yuri
+     Shkuro](https://learning.oreilly.com/library/view/mastering-distributed-tracing/9781788628464/)
+
+
+
+## References
+
+-   [Google SRE book: Monitoring Distributed
+     Systems](https://sre.google/sre-book/monitoring-distributed-systems/)
+
+-   [Mastering Distributed Tracing, by Yuri
+     Shkuro](https://learning.oreilly.com/library/view/mastering-distributed-tracing/9781788628464/)
+
+-   [Monitoring and
+     Observability](https://copyconstruct.medium.com/monitoring-and-observability-8417d1952e1c)
+
+-   [Three PIllars with Zero
+     Answers](https://medium.com/lightstephq/three-pillars-with-zero-answers-2a98b36358b8)
+
+-   Engineering blogs on
+         [LinkedIn](https://engineering.linkedin.com/blog/topic/monitoring),
+         [Grafana](https://grafana.com/blog/),
+         [Elastic.co](https://www.elastic.co/blog/),
+         [OpenTelemetry](https://medium.com/opentelemetry)