Garbage Collectors

Java Garbage collectors

Overview

In the Java platform, there are currently four supported garbage collection alternatives and all but one of them, the serial GC, parallelise the work to improve performance.

Shenandoah

  • low-latency GC

  • operates mostly concurrently with application

ZGC

  • a low-latency concurrent GC introduced in Java 11

G1 (Garbage first) GC

  • default GC from Java 9 onwards

Parallel GC

  • Uses multiple threads for minor collections

  • Uses single thread for major collection

ℹī¸GC progress from JDK 8 to JDK 17

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