Re: Solaris Direct I/O

From: Christo Kutrovsky <kutrovsky.oracle_at_gmail.com>
Date: Fri, 12 Feb 2010 13:54:19 -0500
Message-ID: <52a152eb1002121054m2b1fa44y2ed2d84b2ba7ca5c_at_mail.gmail.com>

Beware of 10.2.0.3 bug with filesystemio_options=setall - DirectIO is NOT used there's a patch and bug number associated with that.

If you are using DirectIO reads/writes won't be recorded in vmstat. You can still see with iostat or you can download http://www.solarisinternals.com/si/tools/directiostat/index.php

-- 
Christo Kutrovsky
Senior Consultant
Pythian.com
I blog at http://www.pythian.com/blogs/

On Tue, Feb 9, 2010 at 1:44 AM, Taral Desai <taral.desai_at_gmail.com> wrote:



> Hi All,

>

> We are using sparc 64bit v 10 with oracle 10.2.0.3. Above that we use SAN

> storage.

>

> 1. How to find if storage is mounted for direct or async io

>

> 2. We had set filesystem option to setall. How to verify it's doing direct

> or async. As with truss i see many kaio failure and then it invokes lwp

> process which do i/o in chunks. So, is there a different call for SAN.

>

> 3 Is there any benefit using veritas ODM over oracle ODM ?

>

>



-- 
Christo Kutrovsky
Senior Consultant
Pythian.com
I blog at http://www.pythian.com/blogs/

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Received on Fri Feb 12 2010 - 12:54:19 CST