Tuning Jenkins Java Settings For Responsiveness and Stability with Large Instances

Hello, Jenkins Community! As of Java 17, the JVM’s defaults have improved to the point where hand-tuned configurations often make performance worse rather than better. The runtime now: Detects container limits and sizes heaps/threads accordingly Optimizes pause times automatically using real-time profiling Allocates memory more efficiently Uses G1GC by default, which is more predictable than older collectors Using -XX:MaxRAMPercentage and -XX:InitialRAMPercentage settings instead of fixed -Xms and -Xmx has resulted in fewer GC pauses, better stability across different container sizes, and…