Bart Grantham wrote:
a long story short: we're experiencing Xeons as 50% slower than Opterons, even when the Xeon has twice as much cache and a slight clock speed advantage.
tests I finally took the final leap: just pull the disks and throw them in a newer Opteron chassis (2.8GHz, 1M cache). And whaddya know? It's got a 20% speed edge on the older Opteron, and blows away the performance of the newer Xeons.
But is the difference in cpu or disk? Do the two machines get a similar disk transfer rate? Same raid card and disks in both machines, do they get the same MB/Sec? (as opposed to on-board controllers) -- Shane Ambler pgSQL (at) Sheeky (dot) Biz Get Sheeky @ http://Sheeky.Biz
