Re: Performance Problem - pgsql on MD3000 DAS

[Lincoln Yeoh <lyeoh(at)pop(dot)jaring(dot)my>]

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.