Lakehouse Research Base

Jan 4, 2026 · Big Data

How We Fixed Flink CDC GC Crashes and Cut Latency from 30min to 5s

This article details a full-chain optimization of a Flink CDC real-time data warehouse pipeline syncing 20 MySQL instances to StarRocks via Kafka, resolving GC crashes, checkpoint failures, and 30-minute latency through resource scaling, parallelism redesign, memory tuning, checkpoint configuration, and startup strategy changes, achieving 5-second end-to-end latency and 100% checkpoint success.