What would be an Optimal Reduced Value of OPTIMIZER_INDEX_COST_ADJ to make it favour index searches ?
Default Value is 100. Thanks -----Original Message----- Sent: Wednesday, November 20, 2002 4:54 PM To: Multiple recipients of list ORACLE-L One quick hack is to set the "optimizer_..." params to make indexes look super-wonderful, which then gives you a rule-based "look and feel" with hopefully a little smarter selection of indexes as a bonus hth connor --- VIVEK_SHARMA <[EMAIL PROTECTED]> wrote: > > Consider using OUTLINES for Fixed Execution plans > especially for Batch Queries > > This will prevent a Sudden Increment in Processing > Time due to Optimizer choosing NON-Optimal paths > > > -----Original Message----- > Sent: Wednesday, November 20, 2002 3:20 AM > To: Multiple recipients of list ORACLE-L > > > We will be in the same process soon. > We'll have to consolidate over 100 instances to > something between 40-60 instances and switch from > RBO > to CBO. > > Any tips are welcome. > > > --- Steve McClure <[EMAIL PROTECTED]> a �crit : > > > I am just starting to look at converting to the cost > > based optimizer, and am > > hoping a few of you can share insights from having > > done so in the past. Our > > application is an oltp system developed on 7.3.4. > > > We made liberal use of > > +0 and other RBO "hints", and I am wondering if > > these are going to cause us > > troubles when switching to CBO. > > > > We have been on 8i since April of this year, and > I > > am just now starting to > > gather information on the inner workings of the > CBO. > > I know it is where I > > want to be, I am just looking to see how > > painful/painless the transition > > will be. > > > > Steve McClure > > > > -- > > Please see the official ORACLE-L FAQ: > > http://www.orafaq.com > > -- > > Author: Steve McClure > > 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). > > ===== > St�phane Paquette > DBA Oracle et DB2, consultant entrep�t de donn�es > Oracle and DB2 DBA, datawarehouse consultant > [EMAIL PROTECTED] > > __________________________________________________________ > L�che-vitrine ou l�che-�cran ? > magasinage.yahoo.ca > -- > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > -- > Author: =?iso-8859-1?q?paquette=20stephane?= > 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). > -- > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > -- > Author: VIVEK_SHARMA > 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). ===== Connor McDonald http://www.oracledba.co.uk http://www.oaktable.net "GIVE a man a fish and he will eat for a day. But TEACH him how to fish, and...he will sit in a boat and drink beer all day" __________________________________________________ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email and Music Charts http://uk.my.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-1?q?Connor=20McDonald?= 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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: VIVEK_SHARMA 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).
