Horst wrote: > I am in the process of consolidating 2 servers[A,B] into 1 machine: > [A] does mainly httpd and mysqld; > [B] handles sendmail with often fairly large and long jobs. > [A] is a 1GHz / 512MB machine, and with 4000 visitors per day (many with > DB access) performs quiet well (CPU load is below 0.2 most of the time and > rarely above 1.0). > [B] is a lame duck (330 MHz), and slows down under load, but that is > currently no problem since apache runs on the other machine. > > Machine [A] has to be replaced with something in the same range (or more > MHz/MB Ram ???) and I am contemplating to get a dual processor machine > for this. I have little experience with dual processor machines and am > wondering how much one can gain in a scenario like that ??? > , and what other potential issues I'll have to deal with with dual > processors (it will be most likely a RH installation; 7.2?)
Dual CPUs will give you about 60-70% more CPU throughput than a single CPU system. They don't do anything for disk or network throughput, so be sure you know where your system bottlenecks are. The workload you described above sounds like it would work fine on a single CPU, unless you anticipate that the workload will increase in the future. I am having real heat problems with my dual Athlon these days. I had to turn on the air conditioning in the house today, even though the outside temperature was only in the high 70s. I fear that I'm going to have to move to an apartment in Alaska in July. (-: But if you have good air conditioning, and if you're putting the machine where you don't have to listen to it, dual Athlons are great. -- Bob Miller K<bob> kbobsoft software consulting http://kbobsoft.com [EMAIL PROTECTED]
