4 .3 .3 查找CPU消耗高的查询

4 .3 .3 查找CPU消耗高的查询
下面的语句用于查找CPU最髙消耗的10个语句，并带有一些相关信息，特别是执行
计划。

SELECT TOP ( 10 )
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) AS statement_text , execution_count , total_worker_time / 1000 AS total_worker_time_ms , ( total_worker_time / 1000 ) / execution_count AS avg_worker_time_ms , total_logical_reads , total_logical_reads / execution_count AS avg_logical_reads , total_elapsed_time / 1000 AS total_elapsed_time_ms , ( total_elapsed_time / 1000 ) / execution_count AS avg_elapsed_time_ms , qp.query_plan FROM sys.dm_exec_query_stats qs CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qp ORDER BY total_worker_time DESC
在找到问题语句之后，就需要分类型处理了。