So I am getting a low cost unmanaged "Virtual Private Server", which means just a root access OS with limited resources. It hasn't been set up yet, but there is only 128mb of ram, which I figured ain't very much so I was just looking at top and trying to decide what number applies here. I'm sure it's enough to run the kernel & OS (debian 5), but apache is kind of a wild card.
ps -o vsz I've never used before and it seems to have it's output truncated at 6 digits which is supposedly the number of bytes of virtual memory used. This number does not even remotely correspond to the values in top, which is all I normally bother with because mem usage is never an issue for me. So almost all of it is firefox and X, and a passive apache has a very small "residential" size but a big "virtual" size, like 260mb. That can't be right.
Does anyone know what I should be looking at here?