Re: ORACLE AND UNIX QUESTION
From: Lee E Parsons <lparsons_at_world.std.com>
Date: Thu, 13 Oct 1994 14:02:28 GMT
Message-ID: <CxM704.4D3_at_world.std.com>
Date: Thu, 13 Oct 1994 14:02:28 GMT
Message-ID: <CxM704.4D3_at_world.std.com>
Steve - Schow <sjs_at_shell.portal.com> wrote:
>We did one test with two very similar machines, one using Raw devices and
>the other using UFS files and when we monitored disk i/o from UNIX, we
>noticed that the Raw device was only performing about 30% the number of
>writes that th UFS disk was.
How were they different? Same Controller Types, Disks ...
>This is probably due to inode updating and so forth.
>Still, you can't ignore the fact that there were 1/3 the number of disk writes
>with the raw device. Plus UNIX buffer cache was not being used, which means
>more memory available for Oracle buffer cache.
Am I wrong? Any body else seen this in a side by side test.
-- Regards, Lee E. Parsons Systems Oracle DBA lparsons_at_world.std.comReceived on Thu Oct 13 1994 - 15:02:28 CET