参考文章：

简单的说：

1.死锁发生前，打开开关：

DBCC Traceon (1204,-1)

DBCC Traceon (1222,-1)

2.等待死锁发生

3.查询死锁信息：

Use Master

SELECT

       xed.value('@timestamp', 'datetime') as Creation_Date,

       xed.query('.') AS Extend_Event

FROM

(

       SELECT CAST([target_data] AS XML) AS Target_Data

       FROM sys.dm_xe_session_targets AS xt

       INNER JOIN sys.dm_xe_sessions AS xs

       ON xs.address = xt.event_session_address

       WHERE xs.name = N'system_health'

       AND xt.target_name = N'ring_buffer'

) AS XML_Data

CROSS APPLY Target_Data.nodes('RingBufferTarget/event[@name="xml_deadlock_report"]') AS XEventData(xed)

ORDER BY Creation_Date DESC