Re: Performance Problem - pgsql on MD3000 DAS

At 09:19 PM 5/25/2008, Marc wrote:
>Hi All,
>
>We're migrating to new hardware and to pgsql 8.3.1 from pgsql
><http://8.2.4.>8.2.4.  We were scheduled to go live yesterday
>morning but elected not to late Friday after observing this issue:
>
>Our new hardware includes an external Dell MD3000 RAID array of 15
>15k SAS disks.  We have a 2 disk RAID1 array for txnlog and a 12
>disk RAID10 array for pgsql data.

Try the bonnie++ benchmark on the RAID1 txn log array.

Maybe you should try a 4 disk RAID10 array for txn log (or even more
disks :) ).

Link.