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# Thread: Query onBuilding a scenario with few number of users and more no of transactions/hour

1. ## Query onBuilding a scenario with few number of users and more no of transactions/hour

Requirement:
I have two scripts Sc_1 & Sc_2 both have one main Key Business Transactions (KBT) each and the number of users are 16 and 14 respectively but need to put a load of 165 KBTrans/hour and 20 KBTrans/hour
i.e,
Sciprt No VUsers Key Business Trans/h
Sc_1 16 165
Sc_2 14 20

I am ramping up the 5 users every 10 secs and my total runtime including ramp up is 90 mins.

What changes to be made in the script and as well in the controller??

2. ## Re: Query onBuilding a scenario with few number of users and more no of transactions/hour

What do your mathematical calculations suggest?

3. ## Re: Query onBuilding a scenario with few number of users and more no of transactions/hour

Or rather ...
What was your transaction rate for each of the KBT given your current scenario?

If, using the 5 VUs, you are generating at a rate of ... oh, let's say 1.5/s and 0.2/s respectively ... then your /h transaction rates would be 5400/h and 720/h. That's WAY TOO LOW!!

165000/5400 = 31, 20000/720 = 28.

So, our next trial would be 5*31=155 VUs for first script; 5*28=140 VUs for the second script.

Of course, since performance as load increases isn't likely to be linear, you would need to repeat this exercise using the actual rates from this iteration and bump the VUs again.

The 90 minutes runtime you mentioned is not really relevant here, unless you are ramping the whole time. My calculation says you'd be at 2700 VUs by then. SCREAMING!!!!!

1. license limitations (perhaps you don't have 300 VUs to use [img]images/icons/frown.gif[/img] )
2. architecture limitations (smoke curling from the back of the server = Success!)

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