随着数据库快速不断地增长，通过访问所有数据收集统计信息的能力可能会受到固定的批量窗口、内存和CPU约束的阻碍。

With databases growing at an unrelenting pace, the ability to collect statistics by accessing all of the data may be hampered by fixed batch Windows or memory and CPU constraints.

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共享内存适合比较大的数据集，因为它使用内存，支持快速的随机访问。

Shared memory is well suited to larger collections of data and, because it uses memory, grants fast, random access.

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保存在内存中的数据是快速访问，但不稳定。

Data held in memory is fast to access, but volatile.

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一般来说，内存层次结构如下的访问时间与快速的CPU寄存器顶部和缓慢的硬盘驱动器在底部。

Generally, the memory hierarchy follows the access time with the fast CPUregisters at the top and the slow hard drive at the bottom.

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软件占用CPU和内存很少，拥有友好的用户界面，可以通过系统托盘图标快速访问。

Software takes very little CPU and memory, has a friendly user interface, you can quickly access the system tray icon.

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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。

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

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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。

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

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