Re: Re: ora-600 question

Hi!

Just for the record, in 9.2 some views such dba_extents use "ordered" and "use_nl" hints, which force usage of CBO. If you don't have statistics calculated nor optimizer_dynamic_sampling set to at least 2, then you'll be using CBO with default statistics, which usually are quite misleading.

Tanel.

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Tuesday, October 28, 2003 11:09 PM

> The data dictionary should not have any statistics on them and thus will
use
> rule as a "rule" so to speak.
>
> If you have run stats on the data dictionary you coul dbe running into
some
> odd bugs.
>
>
> -----Original Message-----
> Sent: Tuesday, October 28, 2003 2:49 PM
> To: Multiple recipients of list ORACLE-L
>
>
> does the data dictionary still use rule by support? any idea why toad
would
> bother slipping it in?
> >
> > From: "John Shaw" <John.Shaw_at_correctionscorp.com>
> > Date: 2003/10/28 Tue PM 02:59:25 EST
> > To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> > Subject: Re: ora-600 question
> >
> > TOAD puts a hint in.
> >
> > >>> ryan_oracle_at_cox.net 10/28/2003 1:29:25 PM >>>
> > does toad or the oracle instance itself slip in rule hints? We got an
> ora-600 error off of a data dictionary read. i think it has to do with
> explain plan.
> >
> > ORA-00600: internal error code, arguments: [17182], [2325084336], [],
[],
> [], [], [], []
> > Current SQL statement for this session:
> > select /*+ rule */ bucket_cnt, row_cnt, cache_cnt, null_cnt, timestamp#,
> sample_size, minimum, maximum, distcnt, lowval, hiva
> > l, density, col#, spare1, spare2, avgcln from hist_head$ where obj#=:1
and
> intcol#=:2
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > --
> > Author: <ryan_oracle_at_cox.net
> > INET: ryan_oracle_at_cox.net
> >
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> Author: Odland, Brad
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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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