很有用的一句SQL,可以查看每个查询语句占用CPU资源的情况,类似Activity Monitor
SELECT TOP 100
total_worker_time/execution_count AS avg_cpu_cost, plan_handle,execution_count,
(SELECT SUBSTRING(text, statement_start_offset/2 + 1,
(CASE WHEN statement_end_offset = -1
THEN LEN(CONVERT(nvarchar(max), text)) * 2
ELSE statement_end_offset
END - statement_start_offset)/2)
FROM sys.dm_exec_sql_text(sql_handle)) AS query_text
FROM sys.dm_exec_query_stats
--where execution_count>10000 and total_worker_time/execution_count>10000
ORDER BY execution_count desc
--[avg_cpu_cost] DESC