I have a VPS with 384 MB of dedicated RAM. Sometimes it crashes. Can anyone tell me how many visitors it can handle at a time. I am running a forum and two blogs and a image hosting site on my VPS. Further how many visitors/day it can handle easily.
It solely depends on what are the buffer sizes you are passing through apache and how is it tweaked to handle them. As you are going to have a image hosting site, i doubt it would give you a better result as most of the cases few Image requests will fill up your RAM very fast.
A forum requires allot of ram but if tweaked correctly it will run good. I ran on less ram and could handle plenty. Even when google and yahoo hit. Most prob you need to tweek your mysql. Should note i only had a webmin panel no fancy plesk cpanel stuff and was on a xen vps not shared memory.