优化器的行为受三个关键因素的影响：Informix配置文件中OPTCOMPIND参数的值、查询命令和内部统计数据的准确性。
The behavior of the optimizer is influenced by three key factors: the value of OPTCOMPIND parameter in the Informix configuration file, query directives, and the accuracy of internal statistics.
控制各种不同的行为参数，比如可以设置同时传输的文件的个数。
Control various behavioral parameters, such as how many simultaneous file transfers to allow.
控制各种不同的行为参数，比如可以设置同时传输的文件的个数。
Control various behavioral parameters, such as how many simultaneous file transfers to allow.
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