如上所述，性能是查询调优中主要关心的问题。
As stated above, performance is the major concern in query tuning.
通常，任何性能调优项目的首要问题是问题描述。
Typically, in any performance tuning project the first issue is one of problem statement.
对应用程序本身进行调优是另一个复杂的问题。
Tuning the application itself is yet another complex matter.
问题在于，这样的行情会引发回调吗？
我试图实现回调机制，但仍然有一些问题。
I've tried to implement a callback mechanism, but it still has some problems.
它不仅可以款待数量较多的来宾，而且可以较好地处理众口难调的问题。
It can not only hospitality amount is more guests, and can better processing des questions.
它不仅可以款待数量较多的来宾，而且可以较好地处理众口难调的问题。
It can not only hospitality amount is more guests, and can better processing des questions.
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