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  1. JDK
  2. JDK-6298694

bad performance with big object in heap

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P3 P3
    • 6
    • 5.0, 5.0u6, 6
    • hotspot
    • gc
    • b74
    • generic, x86, sparc
    • generic, linux, solaris_10
    • Verified

        Allocation of big long lived array in heap significally reduce performance of Parallel and Conc GC. In mustang parallel works fine, but Conc still very slow.

        http://forum.java.sun.com/thread.jspa?messageID=3801578

        See my reproduction source in attachment. SerialGC is more than 10 times faster than Conc.
        java -XX:+PrintGCDetails -Xmx768m -XX:+Use<GC> gctest.Main
        ###@###.### 2005-07-19 13:56:08 GMT

              jmasa Jon Masamitsu (Inactive)
              azhmursunw Anatoly Zhmur (Inactive)
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