SQL 查看CPU消耗最多的10个语句

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--详细版,查看CPU消耗最多的10个语句 SELECT TOP 10 [cpu_time], [session_id], [request_id], [start_time] AS '开始时间', [status] AS '状态', [command] AS '命令', dest.[text] AS 'sql语句', DB_NAME([database_id]) AS '数据库名', [blocking_session_id] AS '正在阻塞其他会话的会话ID', [wait_type] AS '等待资源类型', [wait_time] AS '等待时间', [wait_resource] AS '等待的资源', [reads] AS '物理读次数', [writes] AS '写次数', [logical_reads] AS '逻辑读次数', [row_count] AS '返回结果行数' FROM sys.[dm_exec_requests] AS der CROSS APPLY sys.[dm_exec_sql_text](der.[sql_handle]) AS dest ORDER BY [cpu_time] DESC

　　

查看等待信息

如果SQLSERVER存在要等待的资源，那么执行下面语句就会显示出会话中有多少个worker在等待

结合[sys].[dm_os_wait_stats]视图，如果当前SQLSERVER里面没有任何等待资源，那么下面的SQL语句不会显示任何结果

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SELECT TOP 10  [session_id],  [request_id],  [start_time] AS '开始时间',  [status] AS '状态',  [command] AS '命令',  dest.[text] AS 'sql语句',  DB_NAME([database_id]) AS '数据库名',  [blocking_session_id] AS '正在阻塞其他会话的会话ID',  der.[wait_type] AS '等待资源类型',  [wait_time] AS '等待时间',  [wait_resource] AS '等待的资源',  [dows].[waiting_tasks_count] AS '当前正在进行等待的任务数',  [reads] AS '物理读次数',  [writes] AS '写次数',  [logical_reads] AS '逻辑读次数',  [row_count] AS '返回结果行数'  FROM sys.[dm_exec_requests] AS der  INNER JOIN [sys].[dm_os_wait_stats] AS dows  ON der.[wait_type]=[dows].[wait_type]  CROSS APPLY  sys.[dm_exec_sql_text](der.[sql_handle]) AS dest  WHERE [session_id]>50   ORDER BY [cpu_time] DESC