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  1. JDK
  2. JDK-6672574

parallel gc can no longer afford to scribble on memory with a single thread

    Details

    • Type: Enhancement
    • Status: Closed
    • Priority: P4
    • Resolution: Won't Fix
    • Affects Version/s: hs11
    • Fix Version/s: 9
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
      gc
    • Introduced In Build:
      1.4.2
    • Introduced In Version:
    • CPU:
      generic
    • OS:
      generic

      Description

      The following is from a run of SPECjvm98 with a 64-bit fastdebug JVM (jdk7-b24) on a machine w/28G of RAM:

      [GC [PSYoungGen: 28418K->480K(1888448K)] 30878K->2939K(2195648K), 23.4082886 secs] [Times: user=23.40 sys=0.04, real=23.41 secs]

      23 secs is way too long to copy the 480K of data that survives in the young gen.

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              • Assignee:
                jcoomes John Coomes
                Reporter:
                jcoomes John Coomes
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                Dates

                • Created:
                  Updated:
                  Resolved:
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