On 5/12/09 10:06 PM, "Scott Marlowe" <scott.marl...@gmail.com> wrote:
> Just realized I made a mistake, I was under the impression that > Shanghai CPUs had 8xxx numbers while barcelona had 23xx numbers. I > was wrong, it appears the 8xxx numbers are for 4+ socket servers while > the 23xx numbers are for 2 or fewer sockets. So, there are several > quite affordable shanghai cpus out there, and many of the ones I > quoted as barcelonas are in fact shanghais with the larger 6M L2 > cache. > At this point, I wouldn¹t go below 5520 on the Nehalem side (turbo + HT is just too big a jump, as is the 1066Mhz versus 800Mhz memory jump). Its $100 extra per CPU on a $10K + machine. The next 'step' is the 5550, since it can run 1333Mhz memory and has 2x the turbo -- but you would have to be more CPU bound for that. I wouldn't worry about the 5530 or 5540, they will only scale a little up from the 5520. For Opterons, I wouldn't touch anything but a Shanghai these days since its just not much more and we know the cache differences are very important for DB loads. -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
