The improvement is more about putting them in different tablespaces that reside on different physical disks, therefore sharing the I/O between the disks, and having the disk heads searching concurrently, rather than thrashing back and forth..
Mark =================================================== Mark Leith | T: +44 (0)1905 330 281 Sales & Marketing | F: +44 (0)870 127 5283 Cool Tools UK Ltd | E: [EMAIL PROTECTED] =================================================== http://www.cool-tools.co.uk Maximising throughput & performance -----Original Message----- Mengler Sent: 29 April 2002 15:54 To: Multiple recipients of list ORACLE-L Ray Stell wrote: > > On Mon, Apr 29, 2002 at 05:13:22AM -0800, Ganesh Raja wrote: > > My Suggestion would be to give Uniform sized Extents and move the table and > > Index into that tablespace. > -- > > You are taking a preformance hit having the indexes and tables > in the same tablespace, are you not? There is/was a recent and active discussion of this topic in the Oracle Server Usenet forum. While it has long been "recommended" that tables & indexes be placed in separate tablespaces, the current conventional wisdom disputes the claim that performance can/will be enhanced by separating data and indexes into different tablespaces. If anybody can produce recent benchmark results which shows that separating index & data into different tablespaces improves performance, I'd like to see the details behind the benchmark and the results. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Charlie Mengler INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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: Mark Leith INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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).