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Timings for Transactions and Sub-Transactions don't match up

Hi Everyone,

So I have a TruClient Script with a 5 separate Actions. Everything runs fine from Vugen.

In Controller, I used the option "Define each action and step as a transaction". Which means that I have 5 transactions (apart from Init and End) from the Actions, and a number of others from each of the steps within the action.

I ran this scenario for just 1 vuser (for testing) and was looking at the results in Analysis. However, I found it curious that if you sum the timings for individual steps that make up an Action, it never reconciles back; the sum of timings for individual Steps is either greater or less than the timing for the complete Action. Keep in mind that I ran for only 1 vuser, so there are no Average Timings/Max/Mins distorting these figures (as they are all the same).

For example, Lets say Action_1 has 5 Steps - Step_1 through Step 5.

This is what I am seeing in my Analysis Summary:

Transaction Name                                   Minimum           Average           Maximum

Transaction_Action_1                                   50                     50                        50

Transaction_Action_1_Step_1                        15                      15                        15

Transaction_Action_1_Step_2                        10                      10                        10

Transaction_Action_1_Step_3                        20                      20                        20

Transaction_Action_1_Step_4                        15                      15                        15

Transaction_Action_1_Step_5                         5                        5                        

 

As you can see, the timings for Step 1 through 5 add up to 65sec, whereas the overall transaction on the Action level says 50 secs.

Can somebody help us explain what's going on? I am sure there is a simple explanation - but I can't figure this one out and it's doing my head in!!

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