The G1 Garbage Collector, Java's default garbage collector, is a fascinating piece of technology with a long history. In this episode of Stack Walker we take a deep dive of the G1 garbage collector to understand it's key architectural features that allow it to meet its performance goals. We will also take a look at how to use G1, and a brief look into G1's future.

-- Chapters --

0:00 Intro
1:42 G1's History
3:15 Limitations of Existing GCs
4:12 G1's Design
4:34 Generational
5:54 Incremental
8:06 remembered Sets
9:45 Write Barriers
11:54 Parallel & Concurrent
17:51 Stop the World & Evacuating
21:16 Using G1
22:25 Tuning G1
23:54 Future of G1
25:03 Conclusions


-- Resources --

Thomas Schatzl's Blog ➱ https://tschatzl.github.io/
Concurrent Marking in G1 ➱ https://tschatzl.github.io/2022/08/04...
HotSpot VM Tuning Guide ➱ https://docs.oracle.com/en/java/javas...
Throughput Barrier Exploration for the Garbage-First Collector ➱ https://ssw.jku.at/Teaching/MasterThe...
Garbage-First White Paper ➱ http://cs.williams.edu/~dbarowy/cs334...
JEP 423 ➱ https://openjdk.org/jeps/423
Dev.java ➱ https://dev.java
Inside.java ➱ https://inside.java

Tags: #Java #GC #Performance #OpenJDK #JDK #JVM #InsideJava