Glossary term
What is Observability? Meaning for developers
In System Design
Understanding a system's internal state from its outputs. Example: Answering "why is checkout slow for Android users?".
Learn it properly · System DesignLesson 46: Logs, Metrics & Traces: The Three Pillars“Checkout took 20 seconds and failed” — but checkout touches eleven components. How logs, metrics and traces each answer a different question, how to instrument with OpenTelemetry, and how linking them takes you from “something's wrong” to “here's why” in minutes.In Observability & SRE
How well you can understand what is happening inside a system by looking at the data it sends out.
Learn it properly · Observability & SRELesson 0: What Observability Is and the Three PillarsMonitoring versus observability, logs, metrics and traces, the questions each answers, and the golden signals.