JavaZone 2019: Garbage Collectors for busy Java developers

Ef619c225f56f02cc6ef1431e28b1977?s=47 Marco Molteni
September 12, 2019

JavaZone 2019: Garbage Collectors for busy Java developers

Which Garbage collectors save you more money in the Cloud? What's the difference between a Serial and a Parallel GC? What is Shenandoah and why is so good? Do you know which GC you are using daily?
A quick visual overview on the Java Garbage collectors, the GC will be explained in plain English without Statistical formulas.

Ef619c225f56f02cc6ef1431e28b1977?s=128

Marco Molteni

September 12, 2019
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  1. 2.

    3 7

  2. 3.

    Supported Experimental Deprecated (but included) G1 Z Shenandoah Epsilon Non-

    concurrent Concurrent No-ops Java 8 Serial Parallel Java 12 CMS 4 7
  3. 4.

    Supported Experimental Deprecated (but included) G1 Z Shenandoah Epsilon Non-

    concurrent Concurrent No-ops Java 8 Serial Parallel Java 12 CMS 4 3
  4. 5.
  5. 7.
  6. 8.

    App Thread App Thread GC Thread Pause GC Thread App

    Thread App Thread App Thread Pause Pause
  7. 10.
  8. 12.
  9. 16.

    Red Hat Oracle Lead Platforms Production ready Platform independent Linux

    only Java 8u, 11u only RedHat builds Experimental only
  10. 17.
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  12. 21.

    Man kan ikke få både i pose og sekk Garbage

    Collectors = Tradeoff. The best collector is the one that works the well for YOUR application, not the one suggested in Stack Overflow / benchmarks.