Help with Graphing peak values

[Wild, Phil]

Hello hobbit users,
 
I am looking at changing the graph for load average (if possible).
Actually, this applies to a few of the graphs.
 
Typically, our systems are very busy during the day yet at night are
mostly idle (load average of around 10 to 12. When you look at the
graphs produced from a capacity planning perspective, for the last 48
hours, you get accurate values, but from a 576 day graph, the load
average is much lower as it is taking into account the out of hours
period.
 
I was thinking it would be nice to see a line plotted on the same graph
showing the peak value for the sample rather than the average.
 
I have been reading through rrdtool man pages but every change I make
seems to stop the graphs being produced.
 
Ideas?
 
Thanks
 
Phil

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