System performance statistics
Usually for collecting performance metrics, I use munin. But not so far I decided to investigate what's new in this market. My first findings were nagios, cacti and zabbix. It looks like 'all in one solution'. This is awesome, but I was looking for something simple. And then I found what I was looking for — collectd.
collectd is a daemon which collects system performance statistics periodically and provides mechanisms to store the values in a variety of ways, for example in RRD files
collectd don't offer presentation front-end from the box (the UNIX-way :), but you can use: drraw or visage