Re: Question about Undo segments

"Howard J. Rogers" wrote:

> Undo segments are just rollback segments with a new name. Therefore, what
> was true for rollback segments remains true for undo segments.
>
> Therefore, it's your server process that modifies undo buffers. They get
> flushed to disk as dirty buffers whenever DBWn takes it into its head to do
> any osrt of disk writing. The redo for them is the same as it is for any
> modification to any buffer: the before and after image.
>
> In short, there's nothing magic about them -and if you know how rollback
> blocks are dealt with, that's how undo blocks are managed, too.
>
> Regards
> HJR
>
> "Jargular" <zclai_at_yahoo.com> wrote in message
> news:8ae4ae9e.0204270719.22c0f769_at_posting.google.com...
> > Hi,
> >
> > Does anybody know what is the process that writes to the Undo
> > segments? under what condition the Undo buffers are flushed into Undo
> > segments? how are the changes in Undo buffers recorded in the online
> > Redologs? I seached Oracle9i documentation, it seems that they are not
> > detailed in the docs. Anyone can help?
> >
> > really appreciated.
> >
> > Jargular
> > zclai_at_yahoo.com

Howard please answer the following question.

Why, if you know, does Oracle make gratuitous name changes to things?

All this does is create confusion and the name change does not convey a single bit of useful information above and beyond the name rollback.

Lets see now we tried Context. We tried InterMedia. Lets come up with another name. We tried SQL*Forms and SQL*Reports. We tried Developer. We tried Developer/2000. We tried Internet Developer Suite. I know ... we'll come up with still another name. Good grief. It strikes me that someone in marketing has way too much time on their hands.

Thanks,

Daniel Morgan Received on Mon Apr 29 2002 - 11:27:24 CDT