RE: query slow in 9i, but not slow in 8i

  • From: "MacGregor, Ian A." <ian@xxxxxxxxxxxxxxxxx>
  • To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
  • Date: Tue, 02 Mar 2004 11:46:15 -0800

No, I don't know of any algorithm to correct the query time.

Ian MacGregor
Stanford Linear Accelerator Center
ian@xxxxxxxxxxxxxxxxx 

-----Original Message-----
From: Jonathan Lewis [mailto:jonathan@xxxxxxxxxxxxxxxxxx] 
Sent: Tuesday, March 02, 2004 10:48 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: query slow in 9i, but not slow in 8i


Ian,

Do you have any mechanism for correcting the query time; or is it a random 
number ?

Regards

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

The Co-operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/faq/ind_faq.html

March 2004 Hotsos Symposium - The Burden of Proof
  Dynamic Sampling - an investigation
March 2004 Charlotte OUG (www.cltoug.org) CBO Tutorial April 2004 Iceland
June  2004      UK - Optimising Oracle Seminar


----- Original Message -----
From: "MacGregor, Ian A." <ian@xxxxxxxxxxxxxxxxx>


> The  ORA-01555  error indicates you need to p the value of the
UNDO_RETENTION parameter.  You MAY also need to increase the UNDO tablespace
size.  The error does not report the "Query Duration"  accurately.
>
> -----Original Message-----
> From: Guang Mei [mailto:gmei@xxxxxxxxxx]
>
> ORA-01555 caused by SQL statement below (Query Duration=199335 sec, SCN:
> 0x0000.01db218e):


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