On Fri, Oct 10, 2008 at 11:50, Mark Quitoriano <markquitoriano at gmail.com> wrote: > Does the mysql in centos compiled with multi processor support? i have > a mysql in centos 5 running in a core2duo processor and it seems that > it only uses 1 processor. How many tables are you querying in MySQL? If you use MyISAM tables (still the default), only one thread can access a table at a time, so you won't get more performance out of SMP to accesses to the same table. HTH, Filipe