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Pacing Calculation in Load runner

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Today i will share my understanding on “Pacing”.

Usually people take pacing as think time only. I will try to explain both terms first

Think time and Pacing, both are a kind of “wait” or “delay” in terms of time but still both differ from each other.

Think time: Think Time is the time or delay which user can take between two actions

For example, User opens a URL by pressing “Enter” and login page appears but to enter user name or password user is taking some time like copying from other place or remembering it or something like that. This wait or delay we can term as think time in load runner. Think time can be inserted by user in script or captured by tool itself

Whereas, Pacing is the delay between two iterations of test. We can give pacing time by using “Runtime Settings” of load runner tool.

We can calculate Pacing/Think time: Let’s see how?

Calculation:

Just suppose that you have to achieve “50 transactions per second in avg. response 0.5 sec for 100 users in 1 hour” as goal of load test, so how much pacing or think time we should give in our script.


1 hour= 3600 sec

Expected Total Transactions = 50*3600=180000 trns/hour by 100 Users

Each user will perform 180000/100=1800 transactions per hour

1 transaction is taking avg 0.5 sec so 1800 transaction will take = (1800*0.5)/60=15min

Now think time will for this run will be =60-15= 45 min =2700 sec

1800 transactions in 2700 sec so one transaction will take = 1.5 sec ( this think time we need to include)

Total time to complete one iteration = 0.5+1.5=2 sec (avg)

Lets cross check our calculation:

1800 transaction * 2 sec= 1 hour (Achieved)


Hope this will help you guys.
image source : Google
Happy Exploring!!!!

Comments

  1. Abhishek Kumar15 January 2014 at 17:47

    how u got 2160 number transaction

    ReplyDelete
    Replies
    1. Seema Pandey12 March 2014 at 12:07

      Hi Abishek,
      That was typo!!!
      I have updated this one. Thank you for visiting and comment

      Delete
    2. Unknown29 October 2014 at 12:38

      what is the pacing time you have got.?

      Delete
  2. GST Refunds Delhi11 April 2018 at 17:48

    This is the precise weblog for anybody who needs to seek out out about this topic. You notice so much its almost arduous to argue with you. You positively put a brand new spin on a subject that's been written about for years. Nice stuff, simply nice!

    ReplyDelete

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