Re: UNDO segments in 9.2

Is the table a pre-existing empty table, or is it being created on the fly by the import ? In the latter case, does your table have a primary key, or other index - as this could explain why you are seeing two large rollback segments. (Although 200M of table plus an index shouldn't take anything like a gigabyte of undo).

Which error message are you getting ?

Regards

Jonathan Lewis
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The Co-operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/faq/ind_faq.html

-----Original Message-----
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Date: 08 January 2003 00:09

>Hi all:
>
>I'm seeing something odd with the undo segments in
>Oracle 9.2. I have a 1G undo tablespace and am
>trying to import a 200M table. This is the only
>transaction going on at the time and it is failing
>because it is running out of space. When I check the
>undo segments I see TWO undo segments of a significant
>size. One that is used by my import and one more,
>which eats up about a half of the tablespace. I
>thought that Oracle would use up the space taken by
>this "other" segment, but it doesn't and my import
>fails. What am I not knowing about the undo segments
>and oracle9.2?
>
>thanks for any help
>
>Gene
>

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Author: Jonathan Lewis
  INET: jonathan_at_jlcomp.demon.co.uk

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