RE: Urgent: performance problems with 8i to 9i

>----- ------- Original Message ------- -----
>From: =?iso-8859-1?q?Joshua=20Becker?=
><jbecker_sweden_at_yahoo.se>
>To: Multiple recipients of list ORACLE-L
><ORACLE-L_at_fatcity.com>
>Sent: Thu, 22 May 2003 03:56:45
>
>Hi all,
>
>we have following environment remote db v 8.1.7 on
>Sun Solaris E10K. From that db is running a program
>which does updates through database link.
>
>Remote database is version 9.2.0.1.
>
>When remote database version was 8.1.7 to complete
>that run took only 11hours but after upgrading to
>9i it will took more than double.
>
>How you find this kind of problems, what might be
>the reason, all other "moving parts" are the same
>only thing we have changed is the database version
>on remote side...
>
>TIA
>Joshua
>
>Gå ¦íºŠíµ i kí¹ºí°¯ch f>in sajt v䲤erad på ®olltid
>med Yahoo! Express

"Only 11 hours". Waow. IMHO when your processes take that amount of time, there is an inherent problem already. What about having snapshots on the target database and running the process there? The execution plan must be interesting. Anyway, you are in this dangerous zone where a minute change to the behaviour of the CBO can put all of the playing-cards castle down. Search google for 'catastrophe theory'. And seriously consider snapshots.

Regards,

Stephane Faroult
Oriole

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Stephane Faroult
  INET: sfaroult_at_oriolecorp.com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).