Re: AIX 5.2 move from JFS to JFS2

  • From: Fuad Arshad <fuadar@xxxxxxxxx>
  • To: Patty.Charlebois@xxxxxxxxxxxxxx
  • Date: Wed, 27 Jun 2007 07:09:54 -0700 (PDT)

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@xxxxxxxxxxxxxx" <Patty.Charlebois@xxxxxxxxxxxxxx>
To: Oracle-L@xxxxxxxxxxxxx
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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