这个工具的优点是以图形化的方式显示计数器，很容易看到计数器随时间的变化情况。
The advantage of this tool is that it displays the counters graphically, so you can easily see how they change over time.
这个值包含调整内存堆大小花费的时间和收集调优决策所需的统计数据花费的时间。
This value includes the time spent resizing the memory heaps and the time spent collecting statistics to make the tuning decision.
获取这种计数器随时间的测量可以帮助分析人员发现系统的瓶颈，并且调整系统或应用程序的性能。
Capturing the measurements of such counters over time assists analysts to discover system bottlenecks and fine-tune a system or an application's performance.
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