PrintCommandLineFlags

最新推荐文章于 2025-06-16 09:54:27 发布

wangqiaowqo

最新推荐文章于 2025-06-16 09:54:27 发布

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分类专栏： jvm 文章标签： java runtime

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PrintCommandLineFlags 打印HotSpotVM 采用的自动优化参数


11:21 [cafe@a01.crond.uc.zhaowei.youku]$ java -XX:+PrintCommandLineFlags -version
-XX:InitialHeapSize=526651072 -XX:MaxHeapSize=8426417152 -XX:ParallelGCThreads=18 -XX:+PrintCommandLineFlags -XX:+UseCompressedOops -XX:+UseParallelGC 
java version "1.6.0_32"
Java(TM) SE Runtime Environment (build 1.6.0_32-b05)
Java HotSpot(TM) 64-Bit Server VM (build 20.7-b02, mixed mode)


11:48 [cafe@a01.crond.uc.zhaowei.youku]$ java -XX:+PrintGCDetails -version
java version "1.6.0_32"
Java(TM) SE Runtime Environment (build 1.6.0_32-b05)
Java HotSpot(TM) 64-Bit Server VM (build 20.7-b02, mixed mode)
Heap
 PSYoungGen      total 150080K, used 2574K [0x00000007588b0000, 0x0000000763020000, 0x0000000800000000)
  eden space 128704K, 2% used [0x00000007588b0000,0x0000000758b33860,0x0000000760660000)
  from space 21376K, 0% used [0x0000000761b40000,0x0000000761b40000,0x0000000763020000)
  to   space 21376K, 0% used [0x0000000760660000,0x0000000760660000,0x0000000761b40000)
 PSOldGen        total 342912K, used 0K [0x0000000609a00000, 0x000000061e8e0000, 0x00000007588b0000)
  object space 342912K, 0% used [0x0000000609a00000,0x0000000609a00000,0x000000061e8e0000)
 PSPermGen       total 21248K, used 2318K [0x0000000604800000, 0x0000000605cc0000, 0x0000000609a00000)
  object space 21248K, 10% used [0x0000000604800000,0x0000000604a43b68,0x0000000605cc0000)