How can I avoid using rollback segment for batch updates.
I am currently trying to avoid associating a large amount of space for rollback segment as this gets filled up only during the nightly batch updates. All that space will never be used during the day. Hence want to know if there is any way of avoiding the use of rollback segment at the session level.
Rajesh
No, but what you can do is create a large rollback segment to use with your batch job, at the start of your batch job bring the segment online, then use set transaction to use that rollback segment, when the batch job is finished and committed, you can then bring the rollback segment offline.
If you are really pressed for space, as an alternate plan, you could actually create the large segment before the batch job and drop it after.
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2 ONLINE
3 ONLINE
4 ONLINE
5 ONLINE
6 ONLINE
7 ONLINE
8 ONLINE
9 ONLINE
10 ONLINE
11 ONLINE
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13 ONLINE
14 ONLINE
15 ONLINE
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STATUS
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STATUS
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_SYSSMU4$ UNDO 131072
OFFLINE
_SYSSMU5$ UNDO 131072
OFFLINE
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STATUS
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OFFLINE
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OFFLINE
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OFFLINE
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STATUS
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OFFLINE
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OFFLINE
_SYSSMU11$ UNDO_02 131072
OFFLINE
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
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OFFLINE
_SYSSMU13$ UNDO_02 131072
OFFLINE
_SYSSMU14$ UNDO_02 131072
OFFLINE
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
_SYSSMU15$ UNDO_02 131072
OFFLINE
_SYSSMU16$ UNDO_02 131072
OFFLINE
_SYSSMU17$ UNDO_02 131072
OFFLINE
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STATUS
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_SYSSMU19$ UNDO_02 131072
OFFLINE
_SYSSMU20$ UNDO_02 131072
OFFLINE
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alter rollback segment _SYSSMU1$ online
ERROR at line 1:
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alter rollback segment SYSSMU21$ online
ERROR at line 1:
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Edited by: user645399 on Feb 23, 2011 2:52 PMSQL> select segment_name, tablespace_name, initial_extent,status
2 from dba_rollback_segs;
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
SYSTEM SYSTEM 102400
ONLINE
_SYSSMU1$ UNDO 131072
ONLINE
_SYSSMU2$ UNDO 131072
ONLINE
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
_SYSSMU3$ UNDO 131072
ONLINE
_SYSSMU4$ UNDO 131072
ONLINE
_SYSSMU5$ UNDO 131072
ONLINE
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
_SYSSMU6$ UNDO 131072
ONLINE
_SYSSMU7$ UNDO 131072
ONLINE
_SYSSMU8$ UNDO 131072
ONLINE
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
_SYSSMU9$ UNDO 131072
ONLINE
_SYSSMU10$ UNDO 131072
ONLINE
_SYSSMU11$ UNDO_02 131072
OFFLINE
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
_SYSSMU12$ UNDO_02 131072
OFFLINE
_SYSSMU13$ UNDO_02 131072
OFFLINE
_SYSSMU14$ UNDO_02 131072
OFFLINE
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
_SYSSMU15$ UNDO_02 131072
OFFLINE
_SYSSMU16$ UNDO_02 131072
OFFLINE
_SYSSMU17$ UNDO_02 131072
OFFLINE
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
_SYSSMU18$ UNDO_02 131072
OFFLINE
_SYSSMU19$ UNDO_02 131072
OFFLINE
_SYSSMU20$ UNDO_02 131072
OFFLINE
SEGMENT_NAME TABLESPACE_NAME INITIAL_EXTENT
STATUS
_SYSSMU21$ UNDO_02 131072
OFFLINEStill undo_02's segments are offline. -
Error:cannot use system rollback segment for non-system tablespace
Hi,
I have created a oracle database 10.2.0 on fedora 9 system. I have created a user and assigned the default tablespace SATYA and given the permissions. But when I create a table in the user I am getting the following error.
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