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
- 1 2 "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".
- ↑ "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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| Virtual memory | |
| Memory segmentation | |
| Memory allocator | |
| Manual memory management | |
| Garbage collection | |
| Memory safety | |
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