Sql server 在MS SQL（mssql）中查找阻塞/锁定查询

使用sys.dm_os_wait_stats，我发现了我认为存在的锁定问题

  wait type    waittime  pct     running ptc
  LCK_M_RS_S   2238.54   22.14   22.14
  LCK_M_S      1980.59   19.59   41.73

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有什么方法可以找到最上面的阻塞/锁定查询吗？我尝试过查询sys.dm\u db\u index\u operational\u stats，但运气不好。

您可能会发现此查询很有用：

SELECT * 
FROM sys.dm_exec_requests
WHERE DB_NAME(database_id) = 'YourDBName' 
AND blocking_session_id <> 0

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使用脚本：或SQL跟踪/探查器和阻塞的流程报告事件类。

我找到了这个查询，它帮助我找到了锁定的表和导致问题的查询

SELECT  L.request_session_id AS SPID, 
        DB_NAME(L.resource_database_id) AS DatabaseName,
        O.Name AS LockedObjectName, 
        P.object_id AS LockedObjectId, 
        L.resource_type AS LockedResource, 
        L.request_mode AS LockType,
        ST.text AS SqlStatementText,        
        ES.login_name AS LoginName,
        ES.host_name AS HostName,
        TST.is_user_transaction as IsUserTransaction,
        AT.name as TransactionName,
        CN.auth_scheme as AuthenticationMethod
FROM    sys.dm_tran_locks L
        JOIN sys.partitions P ON P.hobt_id = L.resource_associated_entity_id
        JOIN sys.objects O ON O.object_id = P.object_id
        JOIN sys.dm_exec_sessions ES ON ES.session_id = L.request_session_id
        JOIN sys.dm_tran_session_transactions TST ON ES.session_id = TST.session_id
        JOIN sys.dm_tran_active_transactions AT ON TST.transaction_id = AT.transaction_id
        JOIN sys.dm_exec_connections CN ON CN.session_id = ES.session_id
        CROSS APPLY sys.dm_exec_sql_text(CN.most_recent_sql_handle) AS ST
WHERE   resource_database_id = db_id()
ORDER BY L.request_session_id

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是的，我以手动方式结束，并通过以下查询不断点击F5 SELECT*FROM sys.dm_exec_请求交叉应用sys.dm_exec_sql_textsql_handle，其中阻塞_session_id 0I进一步编辑了语句，因此，您总能找到“真正”的罪魁祸首：SELECT*FROM sys.dm_exec_requests交叉应用sys.dm_exec_sql_textsql_handle where session_id IN SELECT blocking_session_id FROM sys.dm_exec_requests where DB_NAMEdatabase_id='SDCS20'和blocking_session_id 0某些语句被阻塞，因为它们被其他语句阻塞，在这种情况下，阻塞会话id将不同于会话id。看起来很有趣。下次遇到这些问题时，我会试试这个