Old enterprise systems prioritized throughput for performance metrics, but modern applications often require low latency due to real-time demands. As heap sizes grow, traditional garbage collectors struggle with predictability in pause times. ZGC and Shenandoah are designed for low-latency environments, offering distinct architectures tailored to different workload requirements. Selecting the appropriate collector depends on specific application needs.
ZGC, an advanced garbage collector for the JVM, enhances Java performance by ensuring efficient memory management, particularly for large applications. Official since JDK 15, it maintains short pause times, but requires considerable CPU resources. ZGC tracks object status using reference coloring, and its relocation process effectively minimizes garbage collection interruptions, promoting scalability.
ZGC is a specialized garbage collector in Java, designed for large heap management and minimal pauses. It suits applications needing substantial memory and consistent response times. Key tuning parameters include heap size and concurrent GC threads, while techniques like enabling large pages and NUMA support optimize performance. Monitoring GC logs aids further tuning.