Re: Solaris 9 UFS,directIO,async,filesystemio_options

From: Ray Stell <stellr_at_cns.vt.edu>
Date: Fri, 4 Mar 2005 09:22:35 -0500
Message-ID: <20050304142235.GA22990@locust.cns.vt.edu>

On Fri, Mar 04, 2005 at 02:00:14PM +0800, zhu chao wrote:
> Unless your system is really heavy write, async doesnot help much. I
> perfer directio+multiple dbwr.

Steve Adam's comments on this may be of interest:

http://www.ixora.com.au/q+a/0011/01170259.htm

"It would be better to say that direct I/O benefits all I/O for which file system buffering is not required. The only Oracle files that benefit from file system buffering are the control files. So direct I/O should be used for all other Oracle files."

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Ray Stell stellr_at_vt.edu (540) 231-4109 Tempus fugit 28^D

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Received on Fri Mar 04 2005 - 09:25:47 CST