sql性能分析语句

SELECT  creation_time  N'语句编译时间'

        ,last_execution_time  N'上次执行时间'

        ,total_physical_reads N'物理读取总次数'

        ,total_logical_reads/execution_count N'每次逻辑读次数'

        ,total_logical_reads  N'逻辑读取总次数'

        ,total_logical_writes N'逻辑写入总次数'

        , execution_count  N'执行次数'

        , total_worker_time/1000 N'所用的CPU总时间ms'

        , total_elapsed_time/1000  N'总花费时间ms'

        , (total_elapsed_time / execution_count)/1000  N'平均时间ms'

        ,SUBSTRING(st.text, (qs.statement_start_offset/2) + 1,

         ((CASE statement_end_offset 

          WHEN -1 THEN DATALENGTH(st.text)

          ELSE qs.statement_end_offset END 

            - qs.statement_start_offset)/2) + 1) N'执行语句'

FROM sys.dm_exec_query_stats AS qs

CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st

where SUBSTRING(st.text, (qs.statement_start_offset/2) + 1,

         ((CASE statement_end_offset 

          WHEN -1 THEN DATALENGTH(st.text)

          ELSE qs.statement_end_offset END 

            - qs.statement_start_offset)/2) + 1) not like '%fetch%'

ORDER BY  total_elapsed_time / execution_count DESC;

sys.dm_exec_query_stats

sys.dm_exec_sql_text