I have these choices for OS Debian 5.0 Ubuntu 8.04 LTS CentOS 5 OpenSuse 11.0/11.1 all as 64bit as well my dedicated remote servers hardware: RAM 1 GB CPU Opteron 146 HDD 160 GB (RAID 1) what should I go with? should I use 64 bit? I've been using openSuse 10.1 for a few years now with ServerAdmin24 but this is no longer available with my ISPs new boxes so I need to upgrade and I have to pay extra for Plesk hence ispconfig3
If you using more then 3.5 GB of memory: yes you can reverse more then 1.5 GB of memory for mysql we are using java applications, and there are litle improvements in performance