Originally posted by feng11

The RBS tablespace is autoextensible. We were thinking of making the RBS tablespace non-extensible to prevent such a case from happening. Does this have any impact?
There's is one way to control de extension of yor RBS in 8i, and it's
using the Optimal Size parameter in the storage clause of the RBS.
When you set it, RBS that have extended beyond this value will automatically shrink.

You can check the Rollback's use statistics joining V$ROLLSTAT and V$ROLLNAME for then estimate the optimal size of your RBS.
This value should be set to minimize the number of extensions and shrinks required for support the size and volume of transactions.

Estimate a value and check statistics periodically.. if there are pretty much shrinks you must increase Optimal Size of your RBS.

This method allow you to keep autoextend TRUE in your RBS for larger transactions.. and allow you a better space administration for them.

Hope it helps..