16.60“What metrics would you monitor?”

“For synchronous flows: throughput, error rate, p95/p99 latency, downstream latency, retries, and runtime saturation. For async flows I'd add queue depth, oldest-message age and DLQ count. For bulk jobs I'd track records processed, failure rate, throughput, and end-to-end job duration. I also like business-level metrics such as customer synchronization success rate and lag.”

Very strong.