Re: sizing sort_area_size

This is the true way only until more advanced mechanisms for digging into a problem become available.
(They might already be here, without our knowing ;)

Tanel.

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Friday, September 19, 2003 8:29 PM

> I'll amend The True Way (TM) based on your suggestions.
>
> --
> Mladen Gogala
> Oracle DBA
>
>
>
> > -----Original Message-----
> > From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On
> > Behalf Of Tanel Poder
> > Sent: Friday, September 19, 2003 1:10 PM
> > To: Multiple recipients of list ORACLE-L
> > Subject: Re: sizing sort_area_size
> >
> >
> > > That gives you only the current use of sort segments. The
> > same applies
> > > to reasoning based on v$sort_usage and V$TEMP_SPACE_HEADER.
> > The only
> > > True Way(TM) of tuning sorts is by using v$sysstat and v$sesstat
> > > values,
> >
> > I think tuning sorts based on "in-memory sort" vs "not-in
> > memory sort" calculations might be ok in simple OLTP
> > envivronments, but in modern DW and OLAP world they give too
> > simplistic overiew of what's happening in database. I'd
> > definitely add events 10032 and 10033 trace for tuning big
> > sorts (v$tempstat and even 10046 trace with waits can be
> > somewhat useful as well).
> >
> > Tanel.
> >
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > --
> > Author: Tanel Poder
> > INET: tanel.poder.003_at_mail.ee
> >
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> Author: Mladen Gogala
> INET: mladen_at_wangtrading.com
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Tanel Poder
  INET: tanel.poder.003_at_mail.ee

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