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  1. JDK
  2. JDK-7132029

G1: mixed GC phase lasts for longer than it should

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2
    • Resolution: Fixed
    • Affects Version/s: hs23
    • Fix Version/s: hs23
    • Component/s: hotspot
    • Subcomponent:
      gc
    • Resolved In Build:
      b16
    • CPU:
      generic
    • OS:
      generic
    • Verification:
      Not verified

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        Description

        It turns out that, under certain circumstances, G1 goes into "mixed GC" phase and does not come out of it in a timely manner. In some cases, several mixed GCs collect no old regions but are still considered "mixed". This, unfortunately, causes a serious issue: while we're in mixed GC mode we do not allow a new conc mark cycle to start. So, we have seen cases where a series of mixed GCs take place, the next cycle starts too late, and we end up with an evac failure / Full GC.

        Many thanks to Charlie Hunt for discovering this.

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                Assignee:
                tonyp Tony Printezis
                Reporter:
                tonyp Tony Printezis
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