RE: concepts document part about separating indexes and tablspaces

The way the statement is written appears to imply that the tablespace in
question is on one real physical disk and that when the indexes are
separated into a different tablespace the index tablespace will be put
on a different physical disk.  In this particular case separating the
tables and indexes probably would help performance providing there are
multiple sessions on the database that access other objects in the same
tablespace concurrently.  Two disks are normally better than one.  The
problem is just about no one has this type of disk arrangement any more.
The world is logical disks made up of multiple physical devices arrayed
in RAID-0, RAID-5, or RAID-10 collections.

-- Mark D Powell -- 
Phone (313) 592-5148 

 


________________________________

        From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of David Aldridge
        Sent: Thursday, May 15, 2008 4:32 PM
        To: davidsharples@xxxxxxxxx; ricks12345@xxxxxxxxx
        Cc: oracle-l@xxxxxxxxxxxxx
        Subject: Re: concepts document part about separating indexes and
tablspaces
        
        
        It's actually in the DBA Guide, and it's still there now:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/indexes.h
tm#i1006372 
         
        "Using different tablespaces (on different disks) for a table
and its index produces better performance than storing the table and
index in the same tablespace. Disk contention is reduced."
        
        
        ----- Original Message ----
        From: David Sharples <davidsharples@xxxxxxxxx>
        To: ricks12345@xxxxxxxxx
        Cc: oracle-l@xxxxxxxxxxxxx
        Sent: Thursday, May 15, 2008 3:18:48 PM
        Subject: Re: concepts document part about separating indexes and
tablspaces
        
        because it doesn't
        
        
        2008/5/15 Rick Ricky <ricks12345@xxxxxxxxx>:
        

                i was talking to someone about this today. I cannot
remember where in the Concepts document that it says that separating
data from indexes improves performances?  



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