Обсуждение: dropping and recreating indexes vs. reindexing
hello all, I used to drop and recreate all user indexes once every night. I noticed that this led to an increase of performance... Today, using postgres-7.2.1, I wonder if this still has benefits, or if I should better use "reindex" or if I don't have to bother about reindexing at all ? any information appreciated, -- Mit freundlichem Gruß Henrik Steffen Geschäftsführer top concepts Internetmarketing GmbH Am Steinkamp 7 - D-21684 Stade - Germany -------------------------------------------------------- http://www.topconcepts.com Tel. +49 4141 991230 mail: steffen@topconcepts.com Fax. +49 4141 991233 -------------------------------------------------------- 24h-Support Hotline: +49 1908 34697 (EUR 1.86/Min,topc) -------------------------------------------------------- Ihr SMS-Gateway: JETZT NEU unter: http://sms.city-map.de System-Partner gesucht: http://www.franchise.city-map.de -------------------------------------------------------- Handelsregister: AG Stade HRB 5811 - UstId: DE 213645563 --------------------------------------------------------
On Thu, 21 Nov 2002, Henrik Steffen wrote: > > hello all, > > I used to drop and recreate all user indexes once every night. > I noticed that this led to an increase of performance... > > Today, using postgres-7.2.1, I wonder if this still has > benefits, or if I should better use "reindex" or if I > don't have to bother about reindexing at all ? The problems that cause index growth are still present in pgsql, so if you are doing a lot of updates / deletes, then yes, reindexing may help. You should check the size of your indexes on disk to see if they are larger than they should be. A quick check is to just to check on the space your datbase is using, then reindex it and check the space used again. If the size drops noticeable, then you probably do have some problems with index growth.