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Sep 17, 2024 · Fundamentals

Understanding JVM Garbage Collection: OopMap, Safepoints, Memory Barriers, and Low‑Latency Collectors

This article explains the internal mechanisms of JVM garbage collection, covering oopMap, safepoints, saferegions, three‑color marking, memory sets, write barriers, and the design of low‑latency collectors such as Shenandoah and ZGC, and provides practical tuning advice.