Summary

NMIS8 uses the RRDTool time series database tool for data storage and graphing, when . When RRDTool has to represent very small or very large numbers are represented , it will use units instead of showing many decimal places.  The following table summarises those units.

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So in the chart below the little m in this case is 100m to 900m milliseconds is in fact 0.1 to 0.9 milliseconds.

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Customization

If you find this feature undesirable you can adjust the relevant graph definitions to NOT use unit autoscaling. Find the graph file you want to adjust in /usr/local/nmis8/models, and open it with an editor. Locate the options section, and add the "--unit-exponent" setting to both standard and small graph definitions, like in the example below:

# ... header lines
%hash = (
# ...
   'option' => {
       'standard' => [
           '--units-exponent','0',
           'DEF:ifInUcastPkts=$database:ifInUcastPkts:AVERAGE',
# ... lots of graph definition statement lines
		],
        'small' => [
            '--units-exponent','0',
            'DEF:ifInUcastPkts=$database:ifInUcastPkts:AVERAGE',
# ...