Temp Tablespace Usage in Oracle

Below queries can be helpful to find details regarding temp tablespace usage.

Temp segment usage per session

SELECT   S.sid || ',' || S.serial# sid_serial, S.username, S.osuser, P.spid, S.module, 
P.program, SUM (T.blocks) * TBS.block_size / 1024 / 1024 mb_used, T.tablespace,
COUNT(*) statements
FROM v$sort_usage T, v$session S, dba_tablespaces TBS, v$process P
WHERE T.session_addr = S.saddr AND S.paddr = P.addr
AND T.tablespace = TBS.tablespace_name
GROUP BY S.sid, S.serial#, S.username, S.osuser, P.spid, S.module, P.program, TBS.block_size, T.tablespace ORDER BY mb_used;

Temp segment usage per statement

SELECT  S.sid || ',' || S.serial# sid_serial, S.username, Q.hash_value, Q.sql_text,
T.blocks * TBS.block_size / 1024 / 1024 mb_used, T.tablespace
FROM    v$sort_usage T, v$session S, v$sqlarea Q, dba_tablespaces TBS
WHERE   T.session_addr = S.saddr
AND     T.sqladdr = Q.address
AND     T.tablespace = TBS.tablespace_name ORDER BY mb_used;

Temp tablespace usage


Hope this article will be helpful during troubleshooting of temp tablespace.

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