在进行任何更改之前，获得性能基准数是很重要的，因为只有与基准进行比较才能确切说明系统变快还是变慢。

Before changing anything, it is critical to get a baseline performance number, because only a comparison to the baseline can definitively show that the system is faster or slower.

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较低的设置会减少连接数，但是以性能作为代价。

Lower Settings reduce the number of connections at the expense of performance.

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但是如果您又不想增加表中定义的索引数，那您的性能调整真到了穷途末路吗？

But if you don't want to increase the number of indexes defined on the table, are you at a performance tuning dead end?

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