On Monday 22 January 2007 08:05, Matt wrote: > I am upgrading a very heavilly used email server to a AMD64 dual core > with CentOS. I am staying with i386 since the web GUI we use lists > 64bit support as beta and I do not want any problems. The real draw > back I see is the max RAM on i386 but perhaps I am wrong. 90 percent > of our CPU load is Spamassassin. Disk I/O is likely a big bottle neck > as well. Currently we run 2 gigabyte of RAM but will likely move to > 4G of DDR2 RAM. Moving from PATA to SATA drives as well. SATA is better than PATA, but it pales compared to SCSI. Even with SATA, an rsync of a large directory tree can hammer the performance of a server, but with SCSI, it doesn't register enough, on a much busier server, to even notice! So, evaluate if the $500 for a *good* disk subsystem is actually worth it - in my case, the answer is a resounding.... YES!!!! -- "The best way to predict the future is to invent it." - XEROX PARC slogan, circa 1978