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  1. JDK
  2. JDK-8044022 JEP 214: Remove GC Combinations Deprecated in JDK 8
  3. JDK-8155886

Release Note: Various GC combinations have now been removed

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    Description

      The GC combinations that were deprecated in JDK 8 have now been removed. This means that the following GC combinations no longer exist:
      * DefNew + CMS
      * ParNew + SerialOld
      * Incremental CMS
      The "foreground" mode for CMS has also been removed.

      The command line flags that were removed are: `-Xincgc, -XX:+CMSIncrementalMode, -XX:+UseCMSCompactAtFullCollection, -XX:+CMSFullGCsBeforeCompaction` and `-XX:+UseCMSCollectionPassing`.

      The command line flag `-XX:+UseParNewGC` no longer has any effect. ParNew can only be used with CMS and CMS requires ParNew. Thus, the `-XX:+UseParNewGC` flag has been deprecated and will likely be removed in a future release.

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            sjohanss Stefan Johansson
            rcalnan Roger Calnan
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