Re: Using DUAL

I am the one that started it.
I saw that each select from dual cost about 4-5 buffer gets. Define view on x$dual and select from that view, no buffer gets.

Yechiel Adar
Mehish
----- Original Message -----
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Sent: Thursday, May 30, 2002 7:48 PM

> Dan:
> The discussion was recent, but I cannot find reference to it.
> I kinda thought Kirti was involved in the thread, and it had something to
do
> with creating an x$dual table as a workround to hammering dual.
>
> Sorry I can't remember any more . . .
>
> Barb
>
>
> > ----------
> > From: Fink, Dan[SMTP:Dan.Fink_at_mdx.com]
> > Reply To: ORACLE-L_at_fatcity.com
> > Sent: Thursday, May 30, 2002 10:23 AM
> > To: Multiple recipients of list ORACLE-L
> > Subject: Using DUAL
> >
> > The developers here have a fondness for using DUAL for simple operations
> > (select count(*) from dual is executed 10000+ times per day). I recall a
> > passing comment somewhere/sometime that there are performance issues
with
> > accessing DUAL. Of course, now that I need to provide some information
to
> > the developers, I can't recall the comment or find documentation.
> >
> > Any assistance is greatly appreciated.
> >
> > Daniel W. Fink
> >
> >
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Yechiel Adar
  INET: adar76_at_inter.net.il

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