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  1. JDK
  2. JDK-8223575

add subspace transitions to gc+metaspace=info log lines

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    • gc
    • b05

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      Description

        Currently, gc+metaspace=info log lines look like this:

        [60.082s][info ][gc,metaspace ] GC(24) Metaspace: 2209K->2209K(1056768K)

        When coops are enabled, this can be confusing as users wonder why they asked for, say, 128M for the metaspace and the log is reporting over 1G. I think it will be valuable to also report the transitions of the metaspace subspaces (at least, when coops are enabled) so that users can get more accurate information about the space they are sizing. I propose the output to look something like this:

        [8.999s][info][gc,metaspace ] GC(7) Metaspace: 2130K->2130K(1056768K) ClassMetadata: 1906K->1906K(8192K) ClassSpace: 223K->223K(1048576K)

        (I'm open to suggestions on what to call "ClassMetadata" and "ClassSpace")

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8227220 add subspace transitions to gc+metaspace=info log lines

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8287377 add subspace transitions to gc+metaspace=info log lines

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8288191 add subspace transitions to gc+metaspace=info log lines

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8223669 Metaspace GC infinite loop

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed

            Enhancement - null JDK-8227179 Test for new gc+metaspace=info output format

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Enhancement - null JDK-8227224 GenCollectedHeap: add subspace transitions for young gen for gc+heap=info log lines

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Enhancement - null JDK-8227225 ParallelGC: add subspace transitions for young gen for gc+heap=info log lines

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            links to

            Commit Commit openjdk/jdk11u-dev/bf0ebd2f

            Review Review openjdk/jdk11u-dev/1126

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                tonyp Tony Printezis
                tonyp Tony Printezis
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