In practice, the amount of memory set aside for survivor space is adjusted on the fly depending on the percentage of objects that survive each collection.

实际上，预留为幸存者空间的内存量会根据在每次收集中幸存下来的对象的百分比进行实时调整。

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In theory, this means that half of the nursery space (that is, the survivor space) is unused at any point in time.

理论上，这意味着托儿所空间的一半(即幸存者空间)在任何时点上都未使用。

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The Memory usage for the applications Heap, Non Heap, Permanent Generation and the different memory pools that the JVM has (new generation, tenured generation, survivor space, etc.)

程序对堆、非堆、永久保存区（Permanent Generation），以及JVM包含的不同内存池（新生对象区、长期对象区、存活空间等）的内存使用情况

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