Observability
Distributed Tracing: Following a Request Across Services
What distributed tracing is, how trace context propagation works, and how to use traces to find the actual source of latency in a multi-service system.
Observability
Metrics: What to Measure and What to Ignore
How to pick the right metrics for your service, understand the different metric types, and avoid the trap of measuring everything.
Observability
Logging That's Actually Useful: Structured Logs and Log Levels
A log that's hard to search is just noise. Structured logging and proper log levels are what separate observability from disk pollution.