I have some web sites one of which is php and mysql oriented and this site gets 1500 - 2000 visitors a day and they stay at the site 30 minutes averagely.
Other 3 sites (business sites) mostly use mails. each site has around 20 - 30 mail accounts and they are used actively . Every few minutes they send and get mails.
I know 5-10 GB storage will be enough but I am not sure what level of RAM, CPU usage e.t.c
Can you give me hint/suggestions VPS conf that will be have good performance?