I've got a database number that increments in real time with certain page views.
I want to make a Munin chart which charts not the total, but how it's changed from minute to minute. I know it's possible but I can't seem to figure out how from the docs, any ideas?
take a look at simplest munin plugins that count something per second - eg forks. you probably would like to use the data type DERIVE or COUNTER [check definitions here] and multiply the value returned by 60 to change from events/sec into events/minute.