TempDB Space Usage

Aaron Bertrand, a blogger on SQLBlog.com and keeper of www.aspfaq.com is one of those SQL Server MVPs whose material is always on my must-read list.  Here's a really useful query he developed to determine the space used by objects in TempDB:

SELECT 

SPID = s.session_id,

s.[host_name],

s.[program_name],

s.status,

s.memory_usage,

granted_memory = CONVERT(INT, r.granted_query_memory*8.00), 

t.text,  

sourcedb = DB_NAME(r.database_id), 

workdb = DB_NAME(dt.database_id), 

mg.*,

su.*

FROM sys.dm_exec_sessions s

INNER JOIN sys.dm_db_session_space_usage su 

ON s.session_id = su.session_id 

AND su.database_id = DB_ID('tempdb') 

INNER JOIN sys.dm_exec_connections c 

ON s.session_id = c.most_recent_session_id 

LEFT OUTER JOIN sys.dm_exec_requests r 

ON r.session_id = s.session_id 

LEFT OUTER JOIN (

SELECT

session_id,

database_id

FROM sys.dm_tran_session_transactions t

INNER JOIN sys.dm_tran_database_transactions dt

ON t.transaction_id = dt.transaction_id 

WHERE dt.database_id = DB_ID('tempdb') 

GROUP BY session_id, database_id

dt

ON s.session_id = dt.session_id

CROSS APPLY sys.dm_exec_sql_text(COALESCE(r.sql_handle,

c.most_recent_sql_handle)) t

LEFT OUTER JOIN sys.dm_exec_query_memory_grants mg 

ON s.session_id = mg.session_id 

WHERE (r.database_id = DB_ID('tempdb') 

OR dt.database_id = DB_ID('tempdb')) 

AND s.status = 'running'

ORDER BY SPID;

You might consider writing your own query based upon dm_db_session_space_usage but this works quite well.  Thanks for sharing this, Aaron!

Enjoy,

-Kev