Re: Rollback datafile size

There is no need to drop the datafiles, just recreate the segments in the current tablespace.

Pick a slow time to do this as you will significantly increase the likelihood of 1555s.

1. Offline rbs1
2. Drop rbs1
3. create rbs1
4. Repeat steps 1 - 3 for all rbs2..rbsN.
5. When complete, resize datafiles appropriately. Don't go to small or you run the risk of transactions failing due to "unable to extend" errors.

Daniel Fink

Michael Milligan wrote:

> The datafile for our rollback segments gre huge because of an improper
> setting. Even setting optimal and shrink, etc., won't help because the
> segments are scattered. Do I have to create a new tablespace? Can I change
> the datafile a rollback segment writes to and then take the other offline?
>
> The datafile is 4.6 GB but the segments are small, so all that space is
> wasted. Any help would be appreciated. I'm trying to read up more, but have
> found nothing about what to do when shrink won't work.
>
> Thanks,
>
> Michael Milligan
> Oracle DBA
> Ingenix, Inc.
> 2525 Lake Park Blvd.
> Salt Lake City, Utah 84120
> wrk 801-982-3081
> mbl 801-628-6058
> michael.milligan_at_ingenix.com
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Author: Daniel Fink
  INET: Daniel.Fink_at_Sun.COM

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