Due to a customer request, we would like to show how the switch --perfdata_uom_string can be used in situations where monitoring systems have issues with unit of measurement (UOM) strings (the unit for performance data) and can not be displayed properly.

For example, if the WAFL check returns the CP counter per second (/s) it can happen that the monitoring system thinks that there is no performance data because it can’t process the string wafl=0/s. In this case, we get an empty graph, such as the one below:

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Using the switch --perfdata_uom_string=persec one can resolve this issue. Performance data will now be recognized and the graph will correctly display the data:

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