!! Please do not post Off Topic to this List !!Are you regularly performing the
appropriate analysis
of optimiser stats?
Its not too uncommon for performance to suddenly go
"over the edge" rather than degrade in the nice linear
fashion. For example, sorts suddenly needing to go to
disk - "just" not fitting into memory etc
hth
connor
- Csillag Zsolt <starsoft_at_interware.hu> wrote: >
>
> Hi,
>
> We have a cgi that displays data from oracle tables.
> The program has been running for several months
> perfectly.
>
> Last week every time it started, it seemed to almost
> "freeze" the Oracle
> server ,
> it didn' t end the operation (many Select
> statements).
>
> After several hours of work we removed the /*+
> FIRST_ROWS */ hints from some of
> the selects and the problem went down to 50% ( It
> woult be a long story to
> tell all the details).
>
> At last we recreated _all_ the indexes and the
> problem dissapeared,
> everything was fine again.
>
> Question: Should a "bad" index cause a problem like
> this and why?
> If an index is "bad" how come Oracle doesn' t see
> it?
>
> It is important for me to know that for I don' t
> want to run in this
> problem again.
>
> Thank you
>
>
> Zsolt Csillag
> Hungary
>
> --
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.com
> --
> Author: Csillag Zsolt
> INET: starsoft_at_interware.hu
>
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Received on Thu Sep 13 2001 - 05:36:16 CDT
