Shenandoah – ultra-low Pause Time Garbage Collector #underthehood
summary
Shenandoah is a low-pause garbage collector included with Java since Java 12; the talk explains how Shenandoah works (including detailed implementation) using many diagrams and animations, builds concepts from the ground up without assuming prior GC knowledge, and discusses when it makes sense to use Shenandoah and why a new collector was developed.
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chapters (9)
- 0:00Introduction
- 1:24Garbage collection basics
- 9:49Stop-the-world problem
- 17:23Shenandoah GC goals
- 22:15Concurrent marking phase
- 30:39Evacuation and compaction
- 40:38CAS and forwarding pointers
- 56:10Performance impact
- 1:02:19When to use Shenandoah
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