Garbage Collection Considered Harmful

README.md

I was like

$ ./build/linux-x86_64-normal-server-release/images/jdk/bin/java -version
openjdk version "9-internal"
OpenJDK Runtime Environment (build 9-internal+0-2017-01-06-171333.me.shenandoah-jdk9)
OpenJDK 64-Bit Server VM (build 9-internal+0-2017-01-06-171333.me.shenandoah-jdk9, mixed mode)

$ ./build/linux-x86_64-normal-server-release/images/jdk/bin/java -XX:+UseG1GC -Xmx256m Oom
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

$ ./build/linux-x86_64-normal-server-release/images/jdk/bin/java -XX:+UseConcMarkSweepGC -Xmx256m Oom
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

$ ./build/linux-x86_64-normal-server-release/images/jdk/bin/java -XX:+UseSerialGC -Xmx256m Oom
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

$ ./build/linux-x86_64-normal-server-release/images/jdk/bin/java -XX:+UseShenandoahGC -Xmx256m Oom
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

But then I was like

$ ./build/linux-x86_64-normal-server-release/images/jdk/bin/java -Xmx256m Oom

And the JVM was like

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

And I was like "Whoa, that hanged in jdk 8. But wait! The PS failed. 9 has G1 by default:

$ ./build/linux-x86_64-normal-server-release/images/jdk/bin/java -verbose:gc -Xmx256m Oom
[0.008s][info][gc] Using G1

So then I was like:

$ ./build/linux-x86_64-normal-server-release/images/jdk/bin/java -XX:+UseParallelGC -Xmx256m Oom

And then the JVM was like:

...

...

...

...

Oom.java

import java.util.*;

public class Oom {
  public static void main(String[] args) {
    List<Object> sink  = new ArrayList<>();
    
    while(true) {
      sink.add(new Object());
    }
  }
}