If you can move the indexes to a separate physical device (and their own tablespace/datafile) then you will reduce I/O contention. If the tablespace/datafile is on the same RAID device then you will be using the same r/w heads and you will not reduce I/O contention.
oraora oraora To: Multiple recipients of list ORACLE-L <oraoraora <[EMAIL PROTECTED]> @rediffmail.c cc: om> Subject: sequential reads/scattered reads Sent by: root 07/11/2002 07:33 AM Please respond to ORACLE-L Guys, Querying my v$session_wait shows 10 rows each DB FILE SEQUENTIAL READ and DB FILE SCATTERED READ. manuals explain it all b'coz of I/O. there are 33 tables and 110 indexes in the same USERS tablespace with only one datafile USERS01.DAT of size 12GB. it's physically laid out in D:\oracle\data. but the hard disk capacity is 100GB with 8 disk heads and RAID5. will not moving the tables and indexes to seperate tablespace reduce I/O traffic ? my manager here says that since it is configured with RAID5 and 8 disk heads , it's not a problem. is it so ? is he right ? plz. clarify me. i need to explain him. it's urgent.he is sitting on my head. TIA. _________________________________________________________ There is always a better job for you at Monsterindia.com. Go now http://monsterindia.rediff.com/jobs -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: oraora oraora 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: Thomas Day 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).