[bigbadbob0]

Originally Posted by amcd

What did you use to get that graph?

The software that manages keeping track of the data and generating the graphs is called Cricket. It's similar to MRTG if you've heard of that. http://cricket.sourceforge.net/

Once you get cricket setup and actually working (not the easiest thing to do) you can branch off of the example http performance demos and add in a datasource to keep the number of users online right now.

The script I use to get the number of users is:

#!/bin/sh

num_users_line=`fetch -o - http://www.mysite.com/forum 2>/dev/null | grep "Currently Active"`                                                          
echo `echo "$num_users_line" | perl -e 'while(<>){print $1 if m/: (\d+)/;}'`

If you actually get cricket up and running (or someone does) and wants me to share the cricket conf I use to get that particular graph I'd be happy to share.