Re: Shrink Table: IEstimating Rollback Space
From: rjamya <rjamya_at_gmail.com>
Date: Thu, 16 Oct 2008 21:46:58 -0400
Message-ID: <9177895d0810161846k155d9af3k8d575f5308a6c4c4@mail.gmail.com>
Date: Thu, 16 Oct 2008 21:46:58 -0400
Message-ID: <9177895d0810161846k155d9af3k8d575f5308a6c4c4@mail.gmail.com>
i haven't see a formula but there is a metalink note that says for larger
tables ' alter table move' might be better since shrink is insert (in the
beginning) and delete (from tail end) operation and hence takes longer and
generated more redo.
Raj
On Thu, Oct 16, 2008 at 4:52 PM, Ian MacGregor <ian_at_slac.stanford.edu>wrote:
> I have a 450 GB table with 150 GB of free space. I'd like to shrink the
> table, but I'm not sure how much rollback will be needed. Is there a
> formula? One that accounts for the indexes as well?
>
> Ian MacGregor
> SLAC National Accelerator Laboratory
>
> --
> http://www.freelists.org/webpage/oracle-l
>
>
>
-- ----- Best regards Rjamya -- http://www.freelists.org/webpage/oracle-lReceived on Thu Oct 16 2008 - 20:46:58 CDT