Re: VMWare and Oracle IO

From: Andrew Kerber <andrew.kerber_at_gmail.com>
Date: Tue, 7 Oct 2014 10:47:29 -0500
Message-Id: <A94E7F7C-E55B-40BA-AFD3-F99473ED3763_at_gmail.com>

Block alignment is important. Staring sector should be 2048.

Sent from my iPad

> On Oct 7, 2014, at 10:29 AM, Jared Still <jkstill_at_gmail.com> wrote:
>
> Fellow Oracleites:
>
> I have been investigating a client database or two that have been experiencing IO problems since being virtualized via VMWare.
>
> SA's claim no IO issues, but we have seen an Oracle IO take up to 3.5 seconds.
> Seems slow to me.
>
> One thing I have learned is the the priority settings on VMWare disk shares can cause this issue for lower priority systems when the favored system(s) are requesting a lot of IO.
>
> What other gotcha's should we be looking for?
>
> Thanks!
>
> Jared Still
> Certifiable Oracle DBA and Part Time Perl Evangelist
> Principal at Pythian
> Pythian Blog http://www.pythian.com/blog/author/still/
> Oracle Blog: http://jkstill.blogspot.com
> Home Page: http://jaredstill.com

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Received on Tue Oct 07 2014 - 17:47:29 CEST