intermediate · 16 min · $5.00
Observability with Telemetry
You can't fix what you can't see. :telemetry turns your app's behaviour into a stream of events you can measure.
After this: Instrument an Elixir app so production tells you what it's doing.
Production is a black box until you instrument it. Elixir ships with
:telemetry — a tiny, dependency-free event bus that the whole ecosystem
already emits to.
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