The rollback segment will not shrink if there are active transactions in
the rollback segment i.e xacts >0 in v$rollstat for that rollback segment.
Check out which transaction is using the rollback segments using
v$transaction where XIDUSN = usn from v$rollname. The ses_addr in
v$transaction should point you to the session which is running this
transaction. Do the honours for that session.

Raj




                                                                                       
                             
                    "Ball, Terry"                                                      
                             
                    <TBall@birch.        To:     Multiple recipients of list ORACLE-L 
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                    com>                 cc:                                           
                             
                    Sent by:             Subject:     Rollback segment shrinks         
                             
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                    June 05, 2002                                                      
                             
                    11:53 AM                                                           
                             
                    Please                                                             
                             
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Oracle 8.1.6.3 on Sun Solaris 2.6.

The rollback tablespace filled up last night and the rollback segments
became full.  I added space to the tablespace and tried shrinking the
rollback segments.  They remained full, so I altered them offline and
online.  The extents are increasing, but I still can not get a shrink to
work.  If they don't stop increasing, my tablespace will fill up again and
I
can't keep throwing disk at it.  Since this is a production system,
bouncing
is not an option.

Any ideas?

TIA

Terry

Terry Ball, DBA
Birch Telecom
Work: 816-300-1335
FAX:  816-300-1800

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