Passing in false, however, means you won't be provided a total run time.
传入false值却意味着得不到运行总时间。
At this point, if the heap is consistently less than 40% free or the GC pauses are taking more than 10% of the total run time, you should consider increasing the heap size.
此时,如果堆闲置空间总是低于40%,或者GC暂停高于总运行时间的10%,就应该考虑增加堆大小。
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