这个内存不能被垃圾收集器释放。

This memory cannot be released by the garbage collector.

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如果垃圾收集器需要释放堆中的内存，则这些内存区域将允许任务使用内存而不需要中断任务。

These areas allow tasks to use memory without being required to block if the garbage collector needs to free memory in the heap.

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例如，如果排序操作需要更多的内存，而一些缓冲池又有多余的内存，那么内存调优器会释放多余的缓冲池内存，并将它分配给排序堆。

For example, if more memory is needed for sort operations and some buffer pools have excess memory, the memory tuner frees up the excess buffer pool memory and allocates it to the sort heaps.

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