Why temp tablespace automatic extent not allow

why we cannot use automatic extent allocation for tempoary tablespace plz tel me the reason

Hi,
Its Optional Caluse, but you need to understand the things what it peforms. Basically what will be the advantage of Autoallocate Option, its going to allocated the extents based on the increase in requirement of Extents based on the data. Think off , due to think is it necessary to use that Option, that too where the data is going to be reside for temporary sake. I don't think. One more thing the data persits with respect to session.
Main purpose of Temporary tablespaces is to improve the concurrency of multiple sort operations that do not fit in memory and can improve the efficiency of space management operations during sorts. Do remember it is Optional Clause as I said before by default it creates temporary tablespaces with locally managed extents of a uniform size.
- Pavan Kumar N

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Temp Tablespace Group or Not

Hi Gurus,
We are in desiging phase of databse and wanted to look at the benefits for temporary tablespace group over the conventional temporary tablespace.
Any idea?
Thoughts are welcome
Can somebody move this thread to Database General? I think I have posted it at wrong place
Regards,
Virendra
Edited by: Virendra.K1.Yadav on Oct 1, 2012 1:32 PM

The thrust of my replies is that OP hasn't really determined 'the type of thing' that needs done so, as yet, there IS no target to aim at. The solution could be as simple as enabling PARALLEL operations that are disabled server wide for some reason. The example doesn't resemble the temp tablespace group as PARALLELISM by default is enabled but temp tablespace group is not. As mentioned by John I am still in design phase of new database as we are migrating from orace 10gR2 to 11gR2 and was thinking of option. In 10g temp space is around 700G and we are trying to decrease it as low as possible without affecting the query performance at least (if not improve).
Certainly it can be informative to study and learn Oracle features, what they are for, relevant scenarios, etc. But you still wind up with a solution waiting for an appropriate problem. One can not wait for the bug to be hit and then apply PSU. There are two things proactive and reactive. Waiting for problem to occur and then go for solution is not a good idea for me and I consider more investment in designing than in maintaining.
It is the problem/cause definitions that are lacking here. Until an appropriate problem has been identified there isn't really any basis for applying any particular solution.I don't agree, sitting idle and waiting for problem to occur and then applying solution.
Regards,
Virendra

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Why temp tablespace automatic extent not allow

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