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--取前10个最耗CPU时间的会话
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',
[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',
[cpu_time]
FROM sys.[dm_exec_requests] AS der
CROSS APPLY
sys.[dm_exec_sql_text](der.[sql_handle]) AS dest
WHERE [session_id]>50
--AND DB_NAME(der.[database_id])='gposdb'
ORDER BY [cpu_time] DESC
select routine_catalog,routine_schema,routine_name
from information_schema.routines
where routine_type = 'procedure' and routine_definition is null
语句逻辑读太多了,一定还有其他操作,主要先确定是什么操作再优化吧
--前20个累计最耗CPU的语句
select top 20 substring(textdata,1,200),count(*),SUM(cpu),SUM(cpu) / COUNT(*)
from sql_test(nolock)
group by substring(textdata,1,200) order by SUM(cpu) desc
--前20个最耗CPU的单个语句
select top 20 * from sql_test(nolock) order by cpu desc