how to improve sequential scans ?

From: Rahul <rahul_at_ratelindo.co.id>
Date: Tue, 17 Jul 2001 04:38:47 -0700
Message-ID: <F001.0034BE43.20010717043545@fatcity.com>

list (AIX, 7.3.2)

5 clients are shooting the same sql to read data from an 18 million rows table.
each time the sql uses a different literal value in the where clause... no bind variables.

I CANNOT TOUCH THE APPLICATION, and have been given the task to re-configure the
DB to increase performance.

i have moved the table and it;s associated index to separate disks. and iostat show that
only that only those two disks are being read.

the session wait show that all the times the sessions are waiting on "db file sequential read"

the db file being sequentially read in the above sessiion is the TABLE from which
all the sid's are reading

the table is analyzed and the sql's issued use the index.

how can i further tune this config. ?

TIA Rahul

PS: my next step is to put the files on raw disks.

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Author: Rahul
INET: rahul_at_ratelindo.co.id

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