Re: Why can I change rollback segs minextents? (Was: Rollback Segments Errors)

Additionally, if you try to change MinExtents to a number larger than the RB Seg's current number of extents, you'll get:

ORA-01570: MINEXTENTS must be no larger than the <x> extents currently allocated

I just tried it on 8.1.6.0.0 Enterprise Edition under NT.

Jack

yong huang wrote:

> Hi, James,
>
> No. I was responding to people that say they can't change the min_extents of
> rollback segments. Oracle manual also says we cannot change it
> (http://technet.oracle.com/docs/products/oracle8i/doc_library/817_doc/server.817/a85397/statem16.htm#2052313).
> But why can I change it? Is this something Oracle changed from an older version
> but forgot to change the documentation? People are not testing and still
> believe how it used to behave?
>
> Yong Huang
> yong321_at_yahoo.com
>
> James wrote:
>
> Rollback segments require a minimum of 2 extents. Is that the question that
> you are asking?
>
> James
>
> -----Original Message-----
> Sent: Friday, November 10, 2000 12:51 PM
> To: Multiple recipients of list ORACLE-L
>
> Hi,
>
> The documentation says we can't change minextents. But I don't have any
> problem changing it to anything other than 1:
>
> SQL> select segment_name, min_extents from dba_rollback_segs;
>
> SEGMENT_NAME MIN_EXTENTS
> ------------------------------ -----------
> SYSTEM 2
> R01 2
> R02 2
> R03 2
> R04 10
>
> SQL> alter rollback segment r04 storage (minextents 2);
>
> Rollback segment altered.
>
> SQL> alter rollback segment r04 storage (minextents 20);
>
> Rollback segment altered.
>
> SQL> alter rollback segment r02 storage (minextents 13);
>
> Rollback segment altered.
>
> SQL> select segment_name, min_extents from dba_rollback_segs;
>
> SEGMENT_NAME MIN_EXTENTS
> ------------------------------ -----------
> SYSTEM 2
> R01 2
> R02 13
> R03 2
> R04 20
>
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--
Jack C. Applewhite
Senior Consultant, OCP Oracle8 DBA
Stonebridge Technologies, Inc.
...The Fast Track to e-Business.