Re: Async and Direct I/O On Solaris using VXFS

From: <przemolicc_at_poczta.fm>
Date: Tue, 28 Jun 2011 10:59:41 +0200
Message-ID: <20110628085940.GA9838_at_host.pgf.com.pl>

On Mon, Jun 27, 2011 at 08:22:41PM +0000, rajesh koppada wrote:
>
> Hello,
>
> How can i confirm that oracle will be doing Direct I/O and Asynchronous i/o with following options.
> Database FILESYSTEMIO_OPTIONS is set to ALL which means to use,
> setall - Enables both ASYNC and DIRECT IO
> we are using VERITAS volume manager 5.0 with VXFS filesystems(We don't have QIO or ODM) and file system mount options are set as follows
> mincache=direct and conovsync=direct
> Will Oracle is going to use both direct i/o and asynchronous i/o with these file system options.
> How can we ensure i am getting direct i/o and Async i/o ?
> can we enable some trace or something just to ensure we are getting both?

If you use FILESYSTEMIO_OPTIONS=setall you don't have to use vxfs mount options "mincache=direct and conovsync=direct". I'd rather avoid them.

Regards
Przemyslaw Bak (przemol)

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Received on Tue Jun 28 2011 - 03:59:41 CDT