In this talk, we will dive into the heart of Apache Flink tuning, equipping attendees with practical strategies to optimize resource utilization. We'll discuss Flink's architecture, performance metrics and provide insights into advanced monitoring tools to identify bottlenecks. We will then provide strategies for memory management, task parallelism, state backend, checkpointing, slot sharing, and network considerations, showcasing how tweaks in these parameters can lead to substantial improvements in resource utilization.