When a customer connects from a remote network, the performance
is impacted to the point of making the application unusable.
Manager: Looks like we need more bandwidth.
I don??™t know how many times I??™ve listened to a conversation like this, mentally banging
my head against an imaginary wall. Without performing other tests on the network
(and testing for bandwidth issues is quite difficult), declaring ???we need more bandwidth???
is a hasty and probably incorrect solution. Latency is more likely to be the cause of the
performance problem.
I generally explain bandwidth and latency with the analogy of a freeway. I often drive
to the airport in Chicago, which means I travel on Interstate 90 (I-90), which is a toll road.
It is also a road that is in a constant state of repair (there??™s a joke that Chicago has two
seasons: winter and construction). As you get close to Chicago, I-90 becomes four or five
lanes and has a speed limit of 65 mph. Of course, you won??™t necessarily move at 65 mph.
The slowdown is not due to a lack of lanes. Instead, it is due to all the cars stopping to
pay tolls or slowing down while moving through construction zones.
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