Re: Oracle 10g hangs intermittently waiting for I/O

From: Pawe³ Kotlarz <pkotla_at_go2.pl>
Date: Sun, 17 May 2009 21:32:10 +0200
Message-ID: <4A10663A.9080705_at_go2.pl>

Yes, all volumes are RAID-5 sets. I am now working with the storage guys and hope that we will be able to thoroughly check all the subsystems. I will share our findings to the list.

Thanks for all suggestions!

Pawel

On 2009-05-16 22:02, Cary Millsap wrote:
> I keep thinking "RAID cache flush" as I read this thread, but I don't
> think I've seen anyone mention it yet. RAID 5 perchance? I hate guessing
> instead of measuring...
>
> Cary Millsap
> Method R Corporation
> http://method-r.com
> http://carymillsap.blogspot.com
> http://twitter.com/cary_millsap
>
>
> 2009/5/16 Rajeev Prabhakar <rprabha01_at_gmail.com
> <mailto:rprabha01_at_gmail.com>>
>
> Hi Pawel,
>
> In no particular order, please check with your sysadmins/storage admins
> about the following :
>
> a) Queue depth of the LUNs / associated optimal settings for your
> storage.
>
> b) Any unsuccessful microcode/firmware upgrade on the FC fabric.
>
> c) Double check for any combination of any FC/non-FC drives
> OR any failure of drives/associated raid group rebuild errors.
>
> d) LUN level i/o statistics and any out of ordinary observations.
>
> -Rajeev
>
>
> 2009/5/16 Pawe³ Kotlarz <pkotla_at_go2.pl>:
> > Thanks, Rajeev. I appreciate your help very much!
> >
> > Pawel
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Received on Sun May 17 2009 - 14:32:10 CDT