# Thread: Run Time Settings question for top GURUs

1. ## Run Time Settings question for top GURUs

Does anyone have a simple system where you can plug in numbers to forecast how to properly run a performance test to make sure you satisfy a certain amount of transaction completions per hour.
For instance, I have 150 users who need to complete 900 orders every hour.
Is there a simple way to calculate transactions per user per hour, average time between iterations, and ramp up without knowing how long it takes to complete the transaction under load in advance.
Would you have to run a test to assess how long it takes to complete the transaction under load first off???

Any simple spreadsheets to figure this out??
Shed some light

HollisB

2. ## Re: Run Time Settings question for top GURUs

</font><ul type="square">[*]<font size="2" face="Verdana, Arial, Helvetica">900 orders</font>[*]<font size="2" face="Verdana, Arial, Helvetica">150 users</font>[*]<font size="2" face="Verdana, Arial, Helvetica">6 orders per user per hour</font>[*]<font size="2" face="Verdana, Arial, Helvetica">600 seconds, mean time between iterations (3600/6)</font>[*]<font size="2" face="Verdana, Arial, Helvetica">480 - 720 seconds spread time between iterations (20%+/-). Random distribution is approx uniform in LoadRunner. Average should equal ~ 600 seconds between iterations</font>[*]<font size="2" face="Verdana, Arial, Helvetica">1/3 time under full load = ramp up</font>[*]<font size="2" face="Verdana, Arial, Helvetica">1 hour time under full load</font>[*]<font size="2" face="Verdana, Arial, Helvetica">1.3333 * 6 (iterations per hour) = iterations per user including ramp up/down</font>[*]<font size="2" face="Verdana, Arial, Helvetica">Ramp up users over 1/3 hour (1200) seconds. Approx 1 user every 8 seconds. Run until iterations are exahausted. As iterations exhaust, vusers should die off naturally without having to be forced to ramp down.</font>[/list]<font size="2" face="Verdana, Arial, Helvetica">

3. ## Re: Run Time Settings question for top GURUs

Wouldn't mean time between iterations be 3600/5 since there are six iterations, and five places for time between iterations (1/2, 2/3, 3/4, etc)?

Gojacketz

4. ## Re: Run Time Settings question for top GURUs

I think James was counting from the start of one iterations to the start of the next iteration. The max length of time that an iteration can take in order to fulfill the requirements of the test parameters.

5. ## Re: Run Time Settings question for top GURUs

Originally posted by dsmit367:
I think James was counting from the start of one iterations to the start of the next iteration. The max length of time that an iteration can take in order to fulfill the requirements of the test parameters.
<font size="2" face="Verdana, Arial, Helvetica">Yep

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