Re: DBWR - How Many is Too Many?

From: Mark Brinsmead <pythianbrinsmead_at_gmail.com>
Date: Thu, 28 Feb 2008 19:57:34 -0700
Message-ID: <cf3341710802281857w4461a4bcvd1fa653ea5cdbade@mail.gmail.com>


Here's another question:

   Are all the disks on the new array (known to be) working correctly? Is there any chance that one (or more) of the RAID-5 groups is operating one disk short of a full set?

On Wed, Feb 27, 2008 at 11:53 AM, David Barbour <david.barbour1_at_gmail.com> wrote:

> We recently moved our database to a new SAN. Performance has just
> tanked. Here's the environment:
> AIX5.3L
> Oracle 9.2.0.7
> SAN - IBM DS4800
>
> We've got 8 filesystems for Oracle data files. Redo, Archive, Undo and
> Temp are all on seperate disk/filesystems from the data files.
>
> All the Oracle datafiles are on RAID5 LUNs with 12 15K RPM 73 (68 usable)
> GB drives. SAN Read and Write Caching are both enabled.
>
> <snip>
>

-- 
Cheers,
-- Mark Brinsmead
  Senior DBA,
  The Pythian Group
  http://www.pythian.com/blogs

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Received on Thu Feb 28 2008 - 20:57:34 CST

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