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Re: After Sort what?

From: Pradeep <agarwalp_at_eeism.com>
Date: 30 Nov 2005 03:05:42 -0800
Message-ID: <1133348742.803676.262740@z14g2000cwz.googlegroups.com>


Thanks, thanks, thanks a lot Jonathan.
Do you have any plans of coming to India?? If yes, i hope your seminars are not too expensive.

Jonathan Lewis wrote:
> "Pradeep" <agarwalp_at_eeism.com> wrote in message
> news:1133341571.360629.100880_at_g49g2000cwa.googlegroups.com...
> > Thanks Jonathan. You Rock.
> > But just need a little bit of clarification. (I hope you don't get
> > pissed of on me)
> >
> > 1. So sort_area_retained_size is a memory area which is retained, it
> > has nothing to do with the Sorted rows (sorted rows are in the temp
> > tablespace) Am i correct ?
>
> That's a point that people could easily argue about,
> but technically I think it's a valid point. But bear in mind
> that if the sort_area_retained_size was large enough the
> sort would have completed in the sort_area_retained_size
> and the rows will still be there in sorted order. Moreover,
> since most people leave the parameter at zero, the
> actual value for sort_area_retained_size follows the
> current value of sort_area_size, so it might be quite
> big and could often be large enough for in-memory
> sorts.
>
>
> > 2. Now who reads the data from the temp tablespace ? is it server
> > process ?
>
> Yes (as in your dedicated server, or shared server process).
>
> > 3. If i don't have a temp tablespace in my database, then where does it
> > store the sorted result set?
>
> If you haven't declared a temp tablespace, or haven't associated
> a user with a temp tablespace then the SYSTEM tablespace is
> the default tablespace. 9i (I think) allowed you do define a
> 'default temporary tablespace' so that any user with no explicitly
> named tablespace would go to the default.
> >
> > Thanks & God Bless
> > Pradeep
> >
Received on Wed Nov 30 2005 - 05:05:42 CST

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