Or Oracle is choosing an awful index. Check the
execution plan.
Regards.
--- Robertson Lee - lerobe <lerobe_at_acxiom.co.uk>
wrote:
> Not my solution, just something I was meaning to
> try.
>
> -----Original Message-----
> Sent: 25 February 2002 11:18
> To: Multiple recipients of list ORACLE-L
>
>
>
> Performance problems with db file sequential read
> can happen for two
> reasons:
> 1) you are doing too many I/O
> 2) each I/O is too slow (now there can many reaons
> why I/O is slow).
>
> So your solution of going with the INDEX_FFS hint is
> too reduce the number
> of
> I/O. Well what if the problem is that the I/O is too
> slow ?
>
> Anjo Kolk
>
> http://www.oraperf.com
>
>
> Robertson Lee - lerobe wrote:
>
> > All,
> >
> > Oracle 8.0.5.0.0 Tru64 4.0f
> >
> > We are having a performance issue with one of our
> applications and it
> looks
> > like it is pointing to the db file sequential
> reads event. I have been
> doing
> > some digging around and a recommendation in a book
> I have has suggested a
> > possible way to alleviate this is to use the
> INDEX_FFS hint in the query.
> > Anyone used this before ??. or indeed any other
> recommendations where I
> > should be looking.
> >
> > Regards
> >
> > Lee
> >
> > The information contained in this communication is
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> > --
> > Author: Robertson Lee - lerobe
> > INET: lerobe_at_acxiom.co.uk
> >
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> --
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> Author: Anjo Kolk
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> Author: Robertson Lee - lerobe
> INET: lerobe_at_acxiom.co.uk
>
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Ing. Christian Trassens
Senior DBA & Unix Administrator
Phone: 0034-699240979
0034-649824704
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Received on Mon Feb 25 2002 - 08:13:22 CST
