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  • JVM内存状况查看方法和分析工具-jmap

    jmap -heap 27657 

    Attaching to process ID 27657, please wait...
    Debugger attached successfully.
    Server compiler detected.
    JVM version is 24.51-b03
    
    using thread-local object allocation.
    Parallel GC with 4 thread(s)
    
    Heap Configuration:
       MinHeapFreeRatio = 40
       MaxHeapFreeRatio = 70
       MaxHeapSize      = 536870912 (512.0MB)
       NewSize          = 1048576 (1.0MB)
       MaxNewSize       = 4294901760 (4095.9375MB)
       OldSize          = 4194304 (4.0MB)
       NewRatio         = 2
       SurvivorRatio    = 8
       PermSize         = 16777216 (16.0MB)
       MaxPermSize      = 67108864 (64.0MB)
       G1HeapRegionSize = 0 (0.0MB)
    
    Heap Usage:
    PS Young Generation
    Eden Space:
       capacity = 11010048 (10.5MB)
       used     = 9314392 (8.882896423339844MB)
       free     = 1695656 (1.6171035766601562MB)
       84.59901355561756% used
    From Space:
       capacity = 262144 (0.25MB)
       used     = 0 (0.0MB)
       free     = 262144 (0.25MB)
       0.0% used
    To Space:
       capacity = 262144 (0.25MB)
       used     = 0 (0.0MB)
       free     = 262144 (0.25MB)
       0.0% used
    PS Old Generation
       capacity = 40894464 (39.0MB)
       used     = 34679464 (33.072914123535156MB)
       free     = 6215000 (5.927085876464844MB)
       84.8023439065004% used
    PS Perm Generation
       capacity = 17301504 (16.5MB)
       used     = 17055496 (16.26538848876953MB)
       free     = 246008 (0.23461151123046875MB)
       98.57811205314867% used
    
    9300 interned Strings occupying 768008 bytes.
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  • 原文地址:https://www.cnblogs.com/yuyutianxia/p/4748311.html
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