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19.2 Graphs for the Web with Nagiosgraph

With the program Nagiosgraph from http://nagiosgraph.sf.net/, performance data supplied by plugins can be displayed graphically in a Web interface in chronological form. The software consists of two Perl scripts. The script insert.pl writes the Nagios performance data to a round-robin database, a ring buffer in which the newest data overwrites the oldest.[194] The advantage of this is the small amount of space required, which can be defined beforehand.

The trick consists of saving data in various resolutions, depending on its age: older data with a lower resolution (e.g., one measurement value per day), current data with a high resolution (e.g., one measurement every five minutes). When setting up the database, ...

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