On Thursday 05 December 2002 13:35, Mark Richard wrote: > Also, I have heard about compressing indexes, but it is something I have > never used before. Can anyone shed some light on the topic? Are there any > drawbacks (ie: reduced IO but increased processing)? >
To obtain optimal results with a compressed index, you need to build it with the least selective columns as the leading columns. A great deal of compression can be had, but you need to be careful where you use it. It can lead to a lot of buffer busy waits. I found that one out the hard way. ;) Jared -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Jared Still 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).
