J Forum
I joined an online conference called J Forum which explored the current state of Java ecosystem, ahead of this September's release of Java 19. Here are some takeaways: Garbage Collector Ergonomics . There are several GC selections for various situations. Here are the recommendations: Serial: single core, smal heaps Parallel: multi-core small heaps; batch jobs with any heap size G1: responsive in medium to large heaps (request-response/DB interactions); only when processors 2+ and memory 1728MB+ Z: responsive in medium to large heaps (request-response/DB interactions); JDK 17+; Pause < 1ms Shenandoah: responsive in medium to large heaps (request-response/DB interactions); JDK 17+; Pause <10ms GC Tuning does not only rely on setting heap size ( -Xmx for well-sized workloads, -XX:MaxRAMPercentage for workloads to be scaled along container memory limits, -XX:ActiveProcessorCount ), but also understanding the workload. You should select appropriate GC and have enough CPUs (che