Java 9 - The Quest for Very Large Heaps

Explore the advancements in Java 9's garbage collection for large memory applications in this 52-minute conference talk from Devoxx. Delve into the collaboration between ActiveViam's Product Center and Oracle's JVM team, uncovering improvements that enable better handling of extensive data sets. Learn about in-memory data structures, NUMA architecture, and various garbage collection strategies, with a focus on G1 GC. Examine the G1 architecture, including young generation and mixed collection processes, as well as concurrent marking techniques. Discover how Java 9 addresses scaling issues, improves marking threads, and enhances work balance. Gain insights into benchmarking results and the implications for parallel applications, equipping yourself with knowledge to optimize large-scale Java projects.

Intro
Background
Data in Memory
Why Java
Data structures
NUMA
Perspective
GC Strategies
G1 Architecture
G1 GC Overview
Young Generation
Mixed Collection
Concurrent Marking
G1 Scale
Threads getting flooded
Benchmark
Improved Marking Threads
Improved Work Balance
Conclusion
Parallel Application