How to find the sessions/user consuming more temp tablespace

Environment details
IBM-AIX 64 bit
Oracle 10.2.0.4.0
Recently we encountered the issue of sudden peak in CPU utilization and temp tablespace usage. We are noticing this issue after Apr CPU 2009 patch and upgrade to 10.2.0.4.
Recently temp space was full and we added 18 GB of space to temp tablespace, within few hours, they are also consumed.
Application team is telling that they did not modify any code. ADDM report suggests most of the recommendations related to SQL tuning only
not sure about the real issue. Can somebody tell me how I can find what are all sessions/user consuming high temp tablespace
Edited by: user1368801 on Sep 1, 2009 5:32 PM

Hi,
Run below query to check if it is used by any session.
select sum(a.BYTES_USED)/1024/1024 used_mb, sum(b.bytes)/1024/1024 total_mb,
sum(a.BYTES_USED)/sum(b.bytes)*100 pct_used
from V$TEMP_EXTENT_POOL a, v$tempfile b
where a.file_id(+) = b.file#
Check who is using it by the below query.
SELECT s.sid,s.serial#,osuser,process,program,s.sql_hash_value,u.extents, u.blocks
FROM v\$session s, v\$sort_usage u
WHERE s.saddr = u.session_addr order by extents,blocks desc
Hope this solves your issue.
Regards
Regards,
Satishbabu Gunukula
Click here to improve RMAN backup Performance using [Block change tracking in Oracle 10g|http://oracleracexpert.blogspot.com/2009/09/block-change-tracking-in-oracle-10g.html]
http://oracleracexpert.blogspot.com

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