获取SQLSERVER中产生锁的SQL语句
SELECT 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_textFROM sys.dm_exec_query_stats as qs CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as st where qs.sql_handle in (select distinct sql_handle from sys.dm_exec_requests where session_id in (SELECT request_session_id as SpidFROM sys.dm_tran_locks lLEFT JOIN sys.partitions pON l.resource_associated_entity_id = p.hobt_idLEFT JOIN sys.indexes iON p.object_id = i.object_idAND p.index_id = i.index_idLEFT JOIN sys.objects oON p.object_id = o.object_idLEFT JOIN sys.schemas sON o.schema_id = s.schema_idLEFT JOIN sys.objects o2ON l.resource_associated_entity_id = o2.object_idLEFT JOIN sys.schemas s2ON o2.schema_id = s2.schema_idLEFT JOIN sys.databases dbON l.resource_database_id = db.database_idWHERE resource_database_id = DB_ID() and request_mode in (\’X\’)))
查询 某个时间点的，所有执行中的sql语句的CPU占用时间（倒排序）
use master;SELECT [session_id], [cpu_time], [start_time], dest.[text] AS \’sql\’, DB_NAME([database_id]) AS \’dbname\’, [row_count] FROM sys.[dm_exec_requests] AS der CROSS APPLY sys.[dm_exec_sql_text](der.[sql_handle]) AS dest WHERE [session_id]>50 ORDER BY [cpu_time] DESC
查询 不同sql语句产生阻塞的情况（主要是由于锁产生的等待）
use master;SELECT top 50 dest.[text] AS \’sql\’, wtt.blocking_session_id, wtt.wait_duration_ms, wtt.session_id FROM sys.dm_os_waiting_tasks wtt LEFT JOIN sys.dm_exec_requests req ON wtt.blocking_session_id = req.session_id CROSS APPLY sys.[dm_exec_sql_text](req.[sql_handle]) AS dest where wtt.blocking_session_id is not null and wtt.wait_duration_ms>2000 order by wait_duration_ms desc
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