In Linux, how to tell how much memory processes are using?

Question

I think I may have a memory leak in my LAMP application (memory gets used up, swap starts getting used, etc.). If I could see how much memory the various processes are using

Answer 1

First get the pid:

ps ax | grep [process name]

And then:

top -p PID

You can watch various processes in the same time:

top -p PID1 -p PID2