类装入器首先判断要求它装入的类是否与过去装入的类相同。

A class loader first determines if it has been asked to load this same class in the past.

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这可以判断处理器类型和创建新启动介质的方式。

These determine the processor type and how to create new boot media.

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智能统计允许服务器判断现有的统计是否可以准确表示当前数据，或者是否需要对它们进行更新。

Smarter statistics allows the server to determine if the existing statistics accurately represent the current data or if they need to be refreshed.

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