On Tue, 19 Apr 2005, J. Andrew Rogers wrote:
> I don't know about 2.5x faster (perhaps on specific types of loads), but the
> reason Opterons rock for database applications is their insanely good memory
> bandwidth and latency that scales much better than the Xeon. Opterons also
> have a ccNUMA-esque I/O fabric and two dedicated on-die memory channels *per
> processor* -- no shared bus there, closer to real UNIX server iron than a
> glorified PC.
Thanks J! That's exactly what I was suspecting it might be. Actually, I
found an anandtech benchmark that shows the Opteron coming in at close to 2.0x
performance:
http://www.anandtech.com/linux/showdoc.aspx?i=2163&p=2
It's an Opteron 150 (2.4ghz) vs. Xeon 3.6ghz from August. I wonder if the
differences are more pronounced with the newer Opterons.
-Jeff
