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Why does my *users plugin report floating point numbers?

April 26, 2017floating Numbers plugin point report

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Why does my *users plugin report floating point numbers?

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…I have a plugin that counts users. Even though all the readings from it are integers the cur value in munin are showing a floating point number. A: This is due to the fact that Munin takes a while to collect all the input numbers and therefore the collection of most numbers does not happen at the precise point in time that RRD wants. When that happens RRD makes an interpolation between the two last data points. This leads to floating point numbers in the number display. NOTE: COUNTER and DERIVE values have to be integers, but the averages calculated based on them are floating point. GAUGE values are floating point. NOTE: Starting from Munin 1.3.3 you can specify graph_printf. Please see the man page rrdgraph_graph for more information on how to use this option. Note that the scaling unit (%s) is supplied automatically by Munin based on the graph_scale setting from the plugin. The defult printf format is %6.2lf (except if the base is 1024, then the format is %7.2lf).