![]() ![]() JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental). ![]() P.S This Shenandoah GC became a product feature in Java 15 JEP 379. To try Shenandoah GC, we need other JDK build like AdoptOpenJDK. Option -XX: UseShenandoahGC not supported Java HotSpot(TM) 64-Bit Server VM (build 12 33, mixed mode, sharing)Ĭ:\Users\mkyong> java -XX: UnlockExperimentalVMOptions -XX: UseShenandoahGCĮrror occurred during initialization of VM Java(TM) SE Runtime Environment (build 12 33) However, both Oracle JDK and OpenJDK don’t contain this new Shenandoah GC, read this also Not all OpenJDK 12 builds include Shenandoah: Here’s why. XX: UnlockExperimentalVMOptions -XX: UseShenandoahGC This GC is an experimental feature, and we need to use the following options to enable the new Shenandoah GC. Shenandoah is a new low-pause and concurrent garbage collector, read this research paper, it reduces GC pause time and independent of the Java heap size (5M or 5G of heap size have the same pause time, useful for large heap applications.) JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) JEP 346: Promptly Return Unused Committed Memory from G1 JEP 344: Abortable Mixed Collections for G1 Java 12 reached General Availability on 19 March 2019, download Java 12 here or this openJDK archived.
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