RE: SMALLFILE TEMP / Temporary Tablespace Groups

My understanding is that a user's session can use only 1 Temporary Tablespace in a Temporary Tablespace Group. So, a normal query will use only one Temporary Tablespace (which is dynamically allocated to it). However, where multiple sessions are created, each session might use a different Temporary Tablespace. Therefore, if a query uses Parallelism (PQ), then it may span Temporary Tablespaces. (I wonder if Oracle will force it to span Temporary Tablespaces, and what happens if the number of Temporary Tablespaces is less than the PQ Degree ?)

 
Hemant K Chitale

-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Wolfson Larry - lwolfs Sent: Wednesday, October 05, 2011 3:25 AM To: ORACLE-L
Subject: SMALLFILE TEMP / Temporary Tablespace Groups

TIA guys.
At an EXADATA install we're using BIGFILES except for TEMP. Where are using SMALLFILE (X-Team recommended many smallfiles for TEMP). I didn't get why. That's because?

We are not using Temporary Tablespace Groups. The reason we are not using them is that a single query is limited to one TEMP tablespace. ALTER USER scott TEMPORARY TABLESPACE temp_ts_group; Doesn't specify limitation. Is this limitation accurate?

LAWRENCE WOLFSON
ORACLE DBACS1 Team
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