RE: Win2000/8.1.7.3.0/SQL

Jared:

The query is selecting from DBA_xxx views. The tables under these views are some of the X$ tables, and tables like user$, ts$, seg$, etc. I can verify that everything but the X$ tables have a degree of 1. How can I check those X$ tables...or should I decide to be content with a resolution?

Thanks,
Mike

-----Original Message-----
Sent: Monday, August 19, 2002 7:38 PM
To: Multiple recipients of list ORACLE-L

Mike,

Is the DEGREEE on the table > 1?

You can see this in DBA_TABLES.

If the degree of parallelism is > 1 then CBO will be used regardless of OPTIMIZER_MODE or OPTIMIZER_GOAL. Using a RULE hint will override the optimizer settings.

I'm guessing that degree is > 1 and you have old statistics.

Jared

On Monday 19 August 2002 17:58, Vergara, Michael (TEM) wrote:
> Ok...this is strange. The optimizer_mode is set to RULE, but if
> I put a RULE hint into the SQL it runs OK. I tried increasing
> the sort_area_size, but no joy. The segment with the largest
> number of extents is the silly TEMP segment with 985. After that
> is IDL_UB1$ with 739, and it tapers off quickly after that.
> On the other hand, this query runs fine on our SAP system, and
> it has thousands of tables and lots of extents.
>
> Well, the RULE hint in a RULE system seems to have worked.
> Weird. I never woulda tried that.
>
> Thanks,
> Mike
>
> -----Original Message-----
> [mailto:Bruce.Reardon_at_comalco.riotinto.com.au]
> Sent: Monday, August 19, 2002 4:28 PM
> To: Multiple recipients of list ORACLE-L
>
>
> or is that 1 db set to first_rows?
> If so try the query with a rule hint?
>

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Author: Vergara, Michael (TEM)
  INET: mvergara_at_guidant.com

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