Observability is a measure for how well internal states of a system can be inferred by knowledge of its external outputs.

The three pillars of observability

  • Metrics are structured, lightweight, and easy to aggregate, providing fast insights into overall performance and quickly alerting you to potential issues
  • Traces provide end-to-end visibility into real requests, giving you a user-centric view of performance and exposing opportunities for optimization
  • Logs provide rich, open-ended context around discrete events, serving as an invaluable resource for debugging, auditing, or arbitrary analysis of usage data

Documentation / Reference

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