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The threshold monitor in NAV 3 uses data from NAV's RRD database, and the RRD files generated by Cricket, to check for and report interfaces with high load, high CPU and related events. At the moment there is no interface to easily adjust the threshold values. However, this is under development.
Operation
ThresholdMon runs as a cron-job. At run-time, it fetches all the thresholds in the RRD database and compares them to the datasource in the corresponding RRD file. If the threshold has been exceeded, it sends an event containing relevant information.
Filling thresholds
As mentioned above, there is no easy way to edit a threshold value. A script exists to set each data source's threshold value to a default value, unless one has already been set. This script is located in $NAVINSTALL/bin with the name fillthresholds.py. To change the predefined threshold value, edit the config file for this script. It is located in $NAVINSTALL/etc with the name fillthresholds.conf. Enter a percentage value here, which will be set on every data source when fillthresholds.py is run.
