Collect statistics for system and network performance

It would be desirable to run a regular snapshot (e.g. every 5 minutes) of statistics for system performance,  network performance and scanner load, etc.

Commands like system-stats, mta-stats and net-stat give a snapshot of the actual situation.

But to be able to correlate a reported problem in e.g. mail flow or otherwise to an underlying problem in the network, system or load, one would need to know the historic data of these commands.

Ideally this would be reported on in a graph or a table.