Oracle has been great about depreciating features, APIs, and libraries before removing them from a new release to the Java platform. With this schema in place, language components that were depreciated in Java 8 are subject for removal in Java 9. There are a few garbage collection combinations that were deemed to be rarely used and depreciated in Java 8. Those combinations, listed here, have been removed in Java 9:
- DefNew + CMS
- ParNew + SerialOld
- Incremental CMS
These combinations, in addition to having been rarely used, introduced an unneeded level of complexity to the garbage collection system. This resulted in an extra drain on system resources without providing a commensurate benefit to the ...
