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在java程序运行JMAP显示MaxHeapSize为3GB,请参见下面MaxHeapSize VS容量分区
Heap Configuration:
MinHeapFreeRatio = 40
MaxHeapFreeRatio = 70
MaxHeapSize = 3221225472 (3072.0MB)
然而,总结了各方面的能力作为
Eden Space:
capacity = 53542912 (51.0625MB)
...
From Space:
capacity = 73728000 (70.3125MB)
...
To Space:
capacity = 76283904 (72.75MB)
...
PS Old Generation
capacity = 1065353216 (1016.0MB)
...
PS Perm Generation
capacity = 253755392 (242.0MB)
...
时,它会导致总容量1452.125MB。
为什么总容量不能达到MaxHeapSize?