OpenJDK Jave Flight Recorder (JFR) is a different implementation than Oracle JDK.OpenJDK 8 and 11 from Red Hat fully support Shenandoah, a low pausetime Garbage Collector for large heaps.OpenJDK uses system tzdata and system certificates (Oracle has these bundle).OpenJDK is delivered with full sources.OpenJDK is provided with full-debug clone-build (-debug- subpackages).Cooperative Memory Management was deprecated for removal with no replacement in JDK10 and removed in JDK11. This allows the user to tune the G1 garbage collector depending on a compromise between memory usage and performance.
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