这两个版本在内部细节上不同,如索引系统、优化器和存储引擎。
The two versions differ in internal details like the indexing system, optimizer, and storage engine.
通过内部统计数据,我指的是系统目录中的统计数据,优化器可以确定最低成本的查询执行计划。
By internal statistics, I mean the statistics in the system catalogs that the optimizer USES to determine the lowest-cost query execution plan.
而完成端口机制是针对操作系统内部进行了优化,在Windows NT 和 Windows 2000上,使用了完成端口的重叠I/O机制才能够真正扩大系统的响应规模。
The completion port mechanism is optimized for the operating system's internal workings.
应用推荐