yes, it's in the DBA Handbook but.... I believe I did see a paper (with, I think, Cary's name on it. Sorry Cary!) way back when that discussed OFA and how to set up your disks and it said to put the indexes in a separate tablespace on a different disk
back before the days of wait event tuning that is --- [EMAIL PROTECTED] wrote: > does anyoen disagree? Didnt this get started with the 'DBA Handbook' > or was it a different text? > > > > > From: "Mercadante, Thomas F" <[EMAIL PROTECTED]> > > Date: 2003/07/15 Tue AM 11:10:05 EDT > > To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> > > Subject: RE: should you seperate indexes from tables in seperate > datafiles > > > > R, > > > > Some of it depends on the disk storage. I have always followed the > > time-proven method of organizing disks and placing indexes away > from the > > tables they belong to. > > > > Our warehouse is using EMC external disk. What the warehouse > architect did > > was to stripe the EMC disks in such a way that all mount points > (Sun system) > > are spread across all the EMC disks. What this does is to spread > all files > > in the database across all the EMC drives. And with 4 Gig of EMC > cache > > available, it further disproves the theory that separing indexes > from data > > are required. The end result, in my case, is almost like one big > RAM disk - > > where all disk IO is spread across all disk. > > > > If you do not have this arrangement, then I would still try and > keep indexes > > and data away from each other. But let's face it, we *never* have > enough > > disk mount points, so we end up merging things together somewhat > anyway. > > > > hope this helps. > > > > Tom Mercadante > > Oracle Certified Professional > > > > > > -----Original Message----- > > Sent: Tuesday, July 15, 2003 10:49 AM > > To: Multiple recipients of list ORACLE-L > > > > > > There has been alot of literature stating that you will recieve > performance > > improvements by seperating indexes and tables across multiple I/O > points. > > > > Ie... you have a tables tablespace and an index tablespace. If you > put them > > on seperate hard drives, you will have less I/O contention. > > > > Now Im seeing some articles stating that this is not true. That > oracle > > actually accesses indexes and tables serially. Now it might be > useful > > seperate indexes from tables for maintenance purposes but this wont > lower > > I/O contention. > > > > Can anyone chime in on this? Curious to see where the evidence is > leading? > > > > -- > > Please see the official ORACLE-L FAQ: http://www.orafaq.net > > -- > > Author: <[EMAIL PROTECTED] > > 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). > > -- > > Please see the official ORACLE-L FAQ: http://www.orafaq.net > > -- > > Author: Mercadante, Thomas F > > 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). > > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: <[EMAIL PROTECTED] > 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). __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Rachel Carmichael 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).
