Z Garbage Collector: The Next Generation
summary
Z Garbage Collector (ZGC) is a concurrent, region‑based, compacting collector that uses load barriers and colored pointers to move most work off pause points and deliver sub‑millisecond pauses. It first appears as experimental in JDK 11 and is production‑ready since JDK 15, supports x86/ARM/Power/RISC‑V on Linux/Windows/Mac, and auto‑tunes GC threads and generation sizing so the only usual knob is max heap. Early generational ZGC reports ~30 μs average, ~200 μs max pauses and achieves 4× throughput while using ~25% of memory versus non‑generational ZGC.
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chapters (7)
- 0:00Introduction
- 0:20Different Collectors
- 3:16Development Timeline
- 7:50Performance
- 9:28Performance Tuning
- 10:56Support for Generations
- 16:31Resources
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