Re: pga_aggregate_target and a memory leak

A comment I picked up from Tom Kyte's
Masterclass in Copenhagen last week was
that there is an effective limit of 1GB to P_A_T - and although a single session is supposed to be allowed 5% of the P_A_T,
you could get about 90MB. So there are
some funny things going on in that area
which still need fixing.

It's a bit tough for big systems, as I've found that the optimizer seems to be
much smarter about memory user and
access paths when P_A_T and W_S_P
are set.

What's the book about ?

Regards

Jonathan Lewis
http://www.jlcomp.demon.co.uk

  The educated person is not the person
  who can answer the questions, but the
  person who can question the answers -- T. Schick Jr

Next public appearance2:
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One-day tutorials:
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The Co-operative Oracle Users' FAQ
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• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Wednesday, January 21, 2004 7:44 PM

> Replies in line...
>
> - Kirti
>
> --- Jared.Still_at_radisys.com wrote:
> > Kirti, you're back!
>
> Thanks. Found some slack time from routine DBA work!
>
> >
> > Must have finished the book. :)
>
> Not yet.. Its tough..
>
>
>
> >
> > Re the PGA problems, what was the value for 'over allocation count' in
> > v$pgastat?
>
> Actually, I never bothered to look at v$pgastat. Should have.. and will,
when we do some more
> testing next week..
>

-- 
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-- 
Author: Jonathan Lewis
  INET: jonathan_at_jlcomp.demon.co.uk

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