I recently noticed, in System Monitor, that multiple Apache2 processes are showing up (with the same "Command Line"). There are currently 6 of them, each with 7MB memory. I also noticed a whole bunch of dbus processes. Is this normal, and is there a way to keep these from using up so much memory?
The apache2 processes are probably threads of the main process, and the 7MB is shared across all those processes. Multiple dbus processes in the list are common, yes. They're not using as much memory as you think they are.