Re: Lets do the time warp again

From: Eric Brown <ebrown2266_at_gmail.com>
Date: Wed, 23 Sep 2009 17:16:29 -0400
Message-ID: <8b9ca9220909231416i4187af6em95e85c85e811c1e5_at_mail.gmail.com>

I think you need to be at least on RHEL4 before you can do both Async and Direct I/O. I think with RHEL3 you could do async or direct I/O but not both together.

It has been a few years since I ran 9.2 on RHEL3 so I'm not 100% sure this is correct.

On Wed, Sep 23, 2009 at 9:38 AM, Niall Litchfield < niall.litchfield_at_gmail.com> wrote:

> cast your mind back if you will to 9.2.0.7 (after 9.2.0.4 anyway) and Linux
> with 2.4 kernel series (RH3 in this case). I know that Oracle supports ASYNC
> io and Direct IO on this platform for this version. (and what patches and
> incantations were required to make async io work). This article
> http://www.labs.redhat.com/magazine/013nov05/features/oracle/ seems
> however to suggest that it was only in 10g that we were able to use both
> together. I'm not sure I believe it, despite the source, but does anyone
> know/recall any restrictions on using both async and direct io together on
> that sort of platform at that time.
>
> --
> Niall Litchfield
> Oracle DBA
> http://www.orawin.info
>

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Received on Wed Sep 23 2009 - 16:16:29 CDT