RBO, CBO, the old story. If you plan to continue using 8.1.7 for a While, then set the parameter OPTIMIZER_MODE to RULE. Your performance will be normal again and programmers will be able to override the parameter By specifying any hint except /*+ RULE */. Before switching to CBO, please read the article about the intelligent life in the optimizer. The article itself is a good one (thanks, Tim) but reading the book from JL (Jonathan Lewis, not Jeniffer Lopez) wouldn't hurt, either.
-- Mladen Gogala Oracle DBA -----Original Message----- Smith, Ron L. Sent: Monday, August 11, 2003 3:14 PM To: Multiple recipients of list ORACLE-L 8.1.7 We recently upgraded an application (Extempore) database from Oracle 7.3.4 to 8.1.7. The clients say the test database, still on Oracle 7.3.4 is much faster than the production database, now on 8.1.7. The server is newer and faster on the production database. The Oracle init parameters are pretty much identical. When I access the database through SQL*PLUS or TOAD, the response is instantaneous. The app uses an ODBC connection which is also 8.1.7. I have tried attaching the tables in MS Access through ODBC. This too is instantaneous. Any ideas? Ron Smith -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Smith, Ron L. INET: [EMAIL PROTECTED] 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: [EMAIL PROTECTED] (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). -------------------------------------------------------- Note: This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. Wang Trading LLC and any of its subsidiaries each reserve the right to monitor all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be the views of any such entity. --------------------------------------------------------- -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Mladen Gogala INET: [EMAIL PROTECTED] 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: [EMAIL PROTECTED] (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).
