Temporary tablespace size

Question

Hi,
I have a doubt regarding temporary tablespace. Oracle 9.2.0.5
When I create the default tablespace temp I see it growing and growing during some days until it reaches the maximum size and then it give the error ORA-01652: unable to extend temp segment by 128 in tablespace TEMP
but monitoring the v$sort_segment I see one or 2 users logged and using the temp.
So my doubt is: what I have to do to find the BEST size for my temp tablespace. which queries is the recomended one to see the temp segments being used ?
Thank you

Answer 1

See http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96521/tspaces.htm#9566
To improve the concurrence of multiple sort operations, reduce their overhead, or avoid Oracle space management operations altogether, create temporary tablespaces. A temporary tablespace can be shared by multiple users and can be assigned to users with the CREATE USER statement when you create users in the database.
Within a temporary tablespace, all sort operations for a given instance and tablespace share a single sort segment. Sort segments exist for every instance that performs sort operations within a given tablespace. The sort segment is created by the first statement that uses a temporary tablespace for sorting, after startup, and is released only at shutdown. An extent cannot be shared by multiple transactions.
You can view the allocation and deallocation of space in a temporary tablespace sort segment using the V$SORT_SEGMENT view. The V$TEMPSEG_USAGE view identifies the current sort users in those segments.