if you are on JFS2 do you have youe filesystems mounted with CIO
There is a bug in 9 where the filesystemio_options is set to null and needs to be changed to setall to use CIO.
There are a lot of IBM documents about tuning filesystems for oracle and whay CIO is good for you.
----- Original Message ----
From: "Patty.Charlebois@greenshield.ca" <Patty.Charlebois@greenshield.ca>
To: Oracle-L@freelists.org
Sent: Wednesday, June 27, 2007 7:47:15 AM
Subject: AIX 5.2 move from JFS to JFS2
Now that I have upgraded our production systems from 9.2.0.7 to 10.2.0.3 I can see via truss that Oracle is taking advantage of our newly implemented JFS2 filesystems and opening the datafiles using CIO.
We are experiencing higher WIO percentages since the upgrade.
My sysadmn has suggested that perhaps I need to increase db_block_buffers to make up for the lack of buffering at the FS level now that we are using JFS2.
Does anyone have any experience and/or thoughts regarding this?
TIA,
Patty
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Received on Wed Jun 27 2007 - 09:09:54 CDT
