I'm trying to maximize the number of servers I can run on my machine without running out of physical RAM. I noticed something strange when comparing top and free statistics:
top says each PID associated with a particular server has a RES of about 100M. Does that mean each running instance of that server reserves 100MB? Since there are 20 of these servers running, this seems contradictory to the output from free which indicates less than 1GB used -/+ buffers/cache. Is there any way to monitor RAM usage over time to see how close I'm getting to using all of my physical RAM? - Grant
