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3.2 Generational ZGC & Sub-Millisecond Pauses
Topic Summary
Discover Java 21 Generational ZGC (-XX:+UseZGC -XX:+ZGenerational), colored pointers, and load barriers.
What You Will Learn
• Understand how ZGC achieves sub-millisecond pauses on terabyte heaps.
• Explain Colored Pointers (metadata stored in the 64-bit reference address).
• Activate Generational ZGC in Java 21 production workloads.
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