On Tue, Sep 9, 2008 at 11:17 PM, 小波 顾 <guxiaobo1982@xxxxxxxxxxx> wrote: > That's it, we have 4 CPUs, each of which has 4 cores, that is we have 16 > cores in total, but we have only 4 to 8 concurrent users, who regularly run > complex queries. That is we can't use all our CPU resources in such a > situation to speed up response time. Unless you have either a small data set or a very powerful RAID array, most the time you won't be CPU bound anyway. But it would be nice to see some work come out to parallelize some of the work done in the back end.