Background: Know: throttling Recognize:

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Presenting results of performance monitoringEdit

Several tools exist for visualising network performance, e.g. Multi Router Traffic Grapher (MRTG)

The Multi Router Traffic Grapher is the free software for monitoring and measuring the traffic load on network links, which allows the user to see traffic load on a network over time in graphical form.

Multi Router Traffic Grapher wasdeveloped by

Tobias Oetiker to monitor router traffic, but has developed into a tool that can create graphs and statistics for almost anything.

Loss of service:

Ifa loss of traffic for some reason occurs for a few hours, it may look like this:

This particular server experienced about a 20min loss of traffic around 10:30am.

Periodic spikes may indicate regular backups:

Spikes occur everyday, which indicates that spikes can be caused by daily backups.

Capped demand may indicate constraint on supply, e.g. throttling:

Throttling is a process to regulate the rate where application processing is conducted, either statically or dynamically. Here, Throttling is used to limit the maximum throughput of the network.

A flat top to the outgoing bandwidth like above shows the network site was slow and /or non responsive to users at that time. This situation suggests bandwidth capping or throttles.

==See also==

graph of use over time from accounting lecture


Tobias Oetiker, 2012, accessed 5 October 2012,