Does anyone know of an easy way to track memory usage over time, just like CPU and bandwidth usage? I mean, something that'll let me know how much memory/swap I was using at the time of a surge in web traffic while I was sleeping.

I could probably do something like free -M >> logfile.log every few minutes using cron, and then write another script to analyze the resulting logfile. But there's got to be a more elegant solution than that! And I don't want to be staring at htop all the time.

Thx,

Overkill, but meets your spec:

http://www.cacti.net/

Wow, that does look like overkill! I'll look into it anyway. Thanks.

IMO, one of the more straightforward solutions is to use 'gnuplot'. This may get you started:
http://www.linode.com/forums/viewtopic. ... ht=gnuplot

Hal Williams