By letting the main operating part of the database reside constantly in the main memory, and utilizing the quick access speed, the system performance is greatly enhanced.

它通过将数据库的“工作版本”常驻内存，利用内存快速的存取速度，使系统性能获得很大的改善。

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For example, some drivers use a memory handle for the identifier to gain quick access to memory containing information about the given instance.

例如，有些驱动程序使用内存句柄做标识以便能快速访问到包含有给定驱动实例的内存信息。

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