You can monitoring TEMPDB usage by using the following SQL statement.
SELECT COALESCE(T1.session_id, T2.session_id) [session_id] , T1.request_id ,
COALESCE(T1.database_id, T2.database_id) [database_id],
COALESCE(T1.[Total Allocation User Objects], 0)
+ T2.[Total Allocation User Objects] [Total Allocation User Objects] ,
COALESCE(T1.[Net Allocation User Objects], 0)
+ T2.[Net Allocation User Objects] [Net Allocation User Objects] ,
COALESCE(T1.[Total Allocation Internal Objects], 0)
+ T2.[Total Allocation Internal Objects] [Total Allocation Internal Objects] ,
COALESCE(T1.[Net Allocation Internal Objects], 0)
+ T2.[Net Allocation Internal Objects] [Net Allocation Internal Objects] ,
COALESCE(T1.[Total Allocation], 0) + T2.[Total Allocation] [Total Allocation] ,
COALESCE(T1.[Net Allocation], 0) + T2.[Net Allocation] [Net Allocation] ,
COALESCE(T1.[Query Text], T2.[Query Text]) [Query Text]
FROM ( SELECT TS.session_id ,
TS.request_id ,
TS.database_id ,
CAST(TS.user_objects_alloc_page_count / 128 AS DECIMAL(15,
2)) [Total Allocation User Objects] ,
CAST(( TS.user_objects_alloc_page_count
- TS.user_objects_dealloc_page_count ) / 128 AS DECIMAL(15,
2)) [Net Allocation User Objects] ,
CAST(TS.internal_objects_alloc_page_count / 128 AS DECIMAL(15,
2)) [Total Allocation Internal Objects] ,
CAST(( TS.internal_objects_alloc_page_count
- TS.internal_objects_dealloc_page_count ) / 128 AS DECIMAL(15,
2)) [Net Allocation Internal Objects] ,
CAST(( TS.user_objects_alloc_page_count
+ internal_objects_alloc_page_count ) / 128 AS DECIMAL(15,
2)) [Total Allocation] ,
CAST(( TS.user_objects_alloc_page_count
+ TS.internal_objects_alloc_page_count
- TS.internal_objects_dealloc_page_count
- TS.user_objects_dealloc_page_count ) / 128 AS DECIMAL(15,
2)) [Net Allocation] ,
T.text [Query Text]
FROM sys.dm_db_task_space_usage TS
INNER JOIN sys.dm_exec_requests ER ON ER.request_id = TS.request_id
AND ER.session_id = TS.session_id
OUTER APPLY sys.dm_exec_sql_text(ER.sql_handle) T
) T1
RIGHT JOIN ( SELECT SS.session_id ,
SS.database_id ,
CAST(SS.user_objects_alloc_page_count / 128 AS DECIMAL(15,
2)) [Total Allocation User Objects] ,
CAST(( SS.user_objects_alloc_page_count
- SS.user_objects_dealloc_page_count )
/ 128 AS DECIMAL(15, 2)) [Net Allocation User Objects] ,
CAST(SS.internal_objects_alloc_page_count / 128 AS DECIMAL(15,
2)) [Total Allocation Internal Objects] ,
CAST(( SS.internal_objects_alloc_page_count
- SS.internal_objects_dealloc_page_count )
/ 128 AS DECIMAL(15, 2)) [Net Allocation Internal Objects] ,
CAST(( SS.user_objects_alloc_page_count
+ internal_objects_alloc_page_count ) / 128 AS DECIMAL(15,
2)) [Total Allocation] ,
CAST(( SS.user_objects_alloc_page_count
+ SS.internal_objects_alloc_page_count
- SS.internal_objects_dealloc_page_count
- SS.user_objects_dealloc_page_count )
/ 128 AS DECIMAL(15, 2)) [Net Allocation] ,
T.text [Query Text]
FROM sys.dm_db_session_space_usage SS
LEFT JOIN sys.dm_exec_connections CN ON CN.session_id = SS.session_id
OUTER APPLY sys.dm_exec_sql_text(CN.most_recent_sql_handle) T
) T2 ON T1.session_id = T2.session_id
