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Home -> Community -> Mailing Lists -> Oracle-L -> Re: sequential reads/scattered reads
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 <ORACLE-L_at_fatcity.com>
@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.
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