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Is there an explanation of what the columns under my Performance Explorer graph mean?

Is there an explanation of what the columns under my Performance Explorer graph mean?

 

The following is a description of what these columns mean using a sample timer called GMO Products.

Group Group that the timer belongs to, in this example it is a page timer.

Name Timer name, in this example GMO Products.

Visible Whether or not the timer is shown in the graph at this time.

Value The exact value shown when the crosshair is at a particular point in the graph.

Factor The amount by which the actual value has been scaled to appear on the graph - 1 equals a real time value.

Source The type of value being taken. The Average, Count, Maximum, Minimum, Sum or STD. Whether all of these value types are available will be dependent on the group of measurement being used eg Timer, Transaction, Summary, etc.

Unit How the value in the "Type" column was measured, i.e Page times are measured in seconds whereas data sent/rec is measured in KB.

Interval Represents the period over which the value is calculated

Count How many times the measure was counted during the test.

Explaining how the count column and the min, max, avg and StdDev columns are related.

Take for example the first timer in the list above of type "document download time". During this test which lasted 70 seconds, this timer was counted 7 times (Count), meaning that every 10 seconds (default time) a measurement was taken for this timer and then averaged. At the end of the test the minimum average taken is shown (Min), the average of all averages taken is shown (Avg) and the maximum of all averages taken is shown (Max). The StdDev reports how much each average value deviates from the overall average.

 

Min Contains the lowest of these seven average values.

Max Contains the highest of these seven average values.

Avg Contains the average of these seven average values.

StdDev How much each average value deviates from the overall average.

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