Concurrent mark sweep collector
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The concurrent mark sweep collector (concurrent mark-sweep collector, concurrent collector or CMS)[1] was a mark-and-sweep garbage collector in the Oracle HotSpot Java virtual machine (JVM) available since version 1.4.1. It was deprecated on version 9[2] and removed on version 14,[3] so from Java 15 it is no longer available.[4][5]
HotSpot garbage collectors
The HotSpot JVM selects the default garbage collector based on several factors.[6] The newer Garbage-First collector (G1) was planned to replace CMS.[7] That change was finally done in version 9.
To launch the JVM with this garbage collector you can add this property to the java command line -XX:+UseConcMarkSweepGC[8][1] when using Java version less than 14.
See also
References
- ^ a b "Concurrent Mark Sweep Collector Enhancements".
- ^ "JEP 291: Deprecate the Concurrent Mark Sweep (CMS) Garbage Collector".
- ^ "JEP 363: Remove the Concurrent Mark Sweep (CMS) Garbage Collector".
- ^ "JVM Garbage Collectors". 18 April 2017.
- ^ "Release Note: JEP 363: Remove the Concurrent Mark and Sweep (CMS) Garbage Collector".
- ^ "Garbage Collector Ergonomics".
- ^ "Java HotSpot Garbage Collection".
- ^ "Garbage Collectors".
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