Re: DBWR - How Many is Too Many?
Date: Thu, 28 Feb 2008 19:57:34 -0700
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:
> Oracle 22.214.171.124
> 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.
-- Cheers, -- Mark Brinsmead Senior DBA, The Pythian Group http://www.pythian.com/blogs -- http://www.freelists.org/webpage/oracle-lReceived on Thu Feb 28 2008 - 20:57:34 CST