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1.JVM内存空间 JVM堆（Heap）= 新生代（Young） + 旧生代（Tenured）  分区作用：新创建的对象通常先将其分配在新生代中，在新生代中经过若干次GC之后仍未释放的对象，再将它移动到旧生代。为了让内存回收更高效（GC会暂停JVM中的应用...

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