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Re: AIX 5.2 move from JFS to JFS2

From: Fuad Arshad <>
Date: Wed, 27 Jun 2007 07:09:54 -0700 (PDT)
Message-ID: <>

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: "" <> To: 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 to 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 This e-mail is confidential, intended solely for the use of the recipient(s) to whom it was addressed. If you have received it in error, please do not copy or distribute this e-mail. We ask that you notify us immediately by replying to the sender and then delete this e-mail. E-mail sent or received over the internet may not be secure. You should use caution when sending e-mail messages containing private and confidential information or consider other secure means to send the information. If you have any questions regarding the authenticity or security of the e-mail you have received please do not hesitate to contact us at 1-800-265-5615. Ce message de courriel est confidentiel et s’adresse uniquement à la personne indiquée. Si vous l’avez reçu par erreur, veuillez ne pas copier ni distribuer ce message de courriel. Nous vous demandons de nous aviser immédiatement en répondant à l’expéditeur, puis en supprimant ce message. Les messages envoyés ou reçus par courriel pourraient ne pas être sécurisés. Vous devriez être prudent lorsque vous envoyez des messages de courriel contenant des renseignements confidentiels et privés ou songer à prendre d’autres moyens sécurisés pour envoyer les renseignements. Si vous avez des questions concernant l’authenticité ou la sécurité d’un courriel que vous avez reçu, n’hésitez pas à communiquer avec nous au 1 800 265-5615. --

Received on Wed Jun 27 2007 - 09:09:54 CDT

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