Production CDC architecture breaks under load long before most teams expect it. With Debezium, Kafka Connect, and Postgres, the failure patterns are consistent: WAL pressure builds up, connector lag drifts unnoticed, and snapshot phases exhaust memory under bursty traffic. This is based on running these pipelines across high throughput systems, including workloads above 10k TPS. The difference between a system that works and one that holds under pressure comes down to observability, WAL discipline, and how connector scaling is handled. Production Debezium CDC Architecture Operational reality vs. tutorial defaults under real load (10k+ TPS) The Default "Tutorial" Setup Assumes low throughput and stable networks. Fails under pressure. Source: Postgres Single WAL Slot Shared slot coupling multiple connectors Default WAL retention settin...
novatechflow | Alexander Alten
Fractional CTO / Chief Architect for Big Data Systems & Distributed Data Processing