Observability
[/əbˌzɜːrvəˈbɪlɪti/]
Definitions
The ability to understand the internal state of a system from its external outputs — logs, metrics, and traces. A highly observable system lets engineers diagnose production issues, understand performance bottlenecks, and predict failures without needing to redeploy or add new instrumentation.
“Poor observability meant it took hours to find the root cause of the outage.”
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