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Limiting undo segments size

From: Hameed, Amir <Amir.Hameed_at_xerox.com>
Date: Fri, 21 Apr 2006 12:27:39 -0400
Message-ID: <77A4D80DB2ADD74EB5D7F1D31626F0C003217D36@usa0300ms03.na.xerox.net>


Folks,
Is there a way to put a limit on the undo segments' size so that they do not grow beyond a certain size; essentially a similar behavior as the manual rollback segments. We have a 30GB undo tablespace. A user ran a job in a way that she was not supposed to and that job extended a particular undo segment to around 29GB and filled up the entire undo tablespace and also start impacting other transactions. The job was cancelled and now the rollback is in progress and Oracle is rolling back the transaction very slowly. In the mean time we have added a few more Gigs of space to the UNDO tablespace to minimize impact on other transactions. The permanent fix would be to educate users on how to run this job properly (This is a standard Oracle code) and push Oracle for a permanent fix. But from an educational stand point, is there a way to limit the growth of undo segments?

Thanks
Amir

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Received on Fri Apr 21 2006 - 11:27:39 CDT

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