保留区区域的标记将根据需要并发运行，而分配和收集是在托儿所区域中进行的。

Marking of the tenure area will run concurrently as required while allocations and collections happen in the nursery.

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如果活动数据的数量增加，J VM需要将堆的大小扩展到4 MB之外，它就会提交稍微多一点的保留区域。

In the event that the amount of live data grows and the JVM needs to expand the heap beyond 4mb, it commits a bit more of the reserved area.

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