Load spikes when new email arrives

[Vincent Fox]

On 01/23/2013 08:16 AM, francis picabia wrote:
>
> I've also backed out the change (yesterday) to 
> /sys/block/sda/queue/nr_requests
> I think it was pushing the load higher and there is no advantage
> in my hardware (SAS with Perc 5/i Raid 5 over 4 disk)
> to run with a low value for nr_requests.
RAID 5?

We use RAID 10 for our Cyrus stores.

I'm in the anti-RAID 5 camp:
http://www.baarf.com/