The first question is whether you really need to rebuild them. If the indexes columns are such that the values are likely to be reused, then I wouldn't bother - since that deleted space will get reused as required.
Cheers Connor --- Mark Richard <[EMAIL PROTECTED]> wrote: > Folks, > > I know that when creating indexes a couple of > settings such as > SORT_AREA_SIZE can have a big impact on duration. > What settings apply > during online rebuilds? Are the rules the same? > What tips do you have? > > Basically we have some very large indexes in an OLTP > system (several > indexes are across ~250m rows, several GB in > physical storage) which have > fairly low density due to deletes and updates. In > looks like the time has > come to rebuild then to gain some performance. Any > other suggestions > regarding tricks to avoid this, etc would be greatly > appreciated. > > Thanks, > Mark. > > PS: If you going to suggest things which are > version specific we're > dealing with 8.1.7.4 on Solaris. > > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<---->>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> > Privileged/Confidential information may be > contained in this message. > If you are not the addressee indicated in > this message > (or responsible for delivery of the message > to such person), > you may not copy or deliver this message > to anyone. > In such case, you should destroy this message and > kindly notify the sender > by reply e-mail or by telephone on (61 3) > 9612-6999. > Please advise immediately if you or your employer > does not consent to > Internet e-mail for messages of this > kind. > Opinions, conclusions and other information > in this message > that do not relate to the official > business of > Transurban City Link Ltd > shall be understood as neither given nor > endorsed by it. > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<---->>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> > > -- > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > -- > Author: Mark Richard > 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).
