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  1. JDK
  2. JDK-6561868

ParNew: Erratic PLAB resizing

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P5
    • Resolution: Not an Issue
    • Affects Version/s: 6
    • Fix Version/s: tbd
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
      gc
    • Introduced In Build:
      1.6
    • Introduced In Version:
      6
    • CPU:
      x86
    • OS:
      windows_2003

      Description

      There is some evidence that PLAB resizing is not working as expected.
      In particular, fairly well-behaved applications exhibit large volatility
      in PLAB sizing when auto-sizing of PLAB's is enabled (the default).
      This not only can causes wasted space in the survivor spaces, but can
      also lead to larger footprint (and more cache misses), more objects
      being prematurely tenured and overall cause worse GC and application
      performance as a result.

      See comments section for more specific detail.

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            Assignee:
            Unassigned Unassigned
            Reporter:
            ysr Y. Ramakrishna
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