Day 16: Batching & Throughput Optimization

Kafka Mastery: Building StreamSocial — Java & Spring Boot Edition, Module 2: Producer Reliability & Performance (Days 11–20)

What we’ll build today

• batch.size, linger.ms, buffer.memory: made explicit, tuned toward StreamSocial’s 50M req/s peak-traffic target

• A precise, non-obvious explanation of why linger.ms=10 costs far less than it looks like it should

• BatchingThroughputBenchmark: a real, concurrent sweep finding the actual throughput/latency knee