当在 SQL 服务器管理工作室 SQL Sever 选项中启用统计时间时, 我能得到以下信息 。
SQL Server parse and compile time: CPU time = 15 ms, elapsed time = 47 ms.
(受影响的1745行)
SQL Server Execution Times: CPU time = 31 ms, elapsed time = 99 ms. SQL Server parse and compile time: CPU time = 0 ms, elapsed time = 0 ms.
以毫秒计有四倍。 现在, 哪个是运行查询的实际时间? 它们似乎不是相对的 。
这取决于你说的"运行查询所需时间"是什么意思
分析时间是准备查询所需的时间, 通过语法检查它, 并创建高度标准化的任务列表 。
简单时间是通过 Algerbrizer 运行查询所需的时间( 这是将对象名称转换为对象代号等的组件), 然后选择或创建查询执行计划 。
这两个阶段所花费的时间加在一起记录为 " 分析与汇编时间 " 。
执行时间是实际执行或运行已编译的计划所需的时间。 因此, 如果您指的是执行查询需要多长时间, 那么这是 SQL 服务器执行时下的过期时间 。
但是,如果你指的是从我打中执行的那一刻开始,完成查询需要多长时间,那么这就是在剖析和编译时间部分以及SQL服务器执行时段的SUM 过期时间部分。
CPU Times( 包括分析与汇编部分以及执行时间部分) 是处理者在这个章节上花费的时间。 因此计算时间长度时, CPU Times 可以被忽略 。
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