我正在研究 SQL SERVER 2008 R2 性能调整部分,但我是新手。
如何计算:
等等。由查询或存储过程创建。
有人可以帮我吗?
抓取Plan Explorer(免费),输入您的 EXEC 调用或查询,并生成实际的执行计划。您将获得各种有趣的指标,包括 CPU 和 I/O。除了比 Management Studio 中更可用的计划之外。
(免责声明:我曾经在 SQL Sentry 工作。)
SET STATISTICS IO
和 SET STATISTICS TIME
是两个设置,可以帮助您测量存储过程查询的执行情况..
SET STATISTICS IO
显示查询生成的磁盘活动量的统计信息。 SET STATISTICS TIME
显示解析、编译和执行查询中每个语句所需的时间。
USE <Your Database>;
GO
SET STATISTICS IO ON;
SET STATISTICS TIME ON;
GO
SELECT *
FROM YourTable
WHERE KeyValue > 1200
GO
SET STATISTICS IO OFF;
SET STATISTICS TIME OFF;
GO
可能的结果
Table 'YourTable'. Scan count 1, logical reads 5, physical
reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0,
lob read-ahead reads 0.
SQL Server parse and compile time:
CPU time = 0 ms, elapsed time = 1 ms.
SQL Server parse and compile time:
CPU time = 0 ms, elapsed time = 1 ms.
(269 row(s) affected)
SQL Server Execution Times:
CPU time = 0 ms, elapsed time = 2 ms.
SQL Server parse and compile time:
CPU time = 0 ms, elapsed time = 1 ms.