What is pacing in Load Runner?

LoadRunner Scripting. The second runtime setting under the General category is ‘Pacing’. Pacing is used to regulate the rate of requests hitting to the server. Using Pacing, you can accurately achieve the required TPS rate against your system instead of just mindlessly hammering it.

How do you calculate think time and pacing in LoadRunner?

1. How to calculate Pacing in LoadRunner?
2. D = Duration of the test (test window/time frame)
3. B = Baseline time (total time taken by 1 Vuser to complete 1 whole iteration)
4. T = Total amount of Think time in the script.
5. I = Expected/Target iteration.
6. R = Residual time of the test window.
7. R = (D – (T + B)*I)
8. P = Pacing interval.

What is think time in performance testing?

Think times are used to simulate human behavior that causes people to wait between interactions with a website. Think times occur between requests in a web performance test and between test iterations in a load test scenario. Using think times in a load test can be useful in creating more accurate load simulations.

What does pacing time mean?

One definition states that Pacing is the sum of response time, think time and delay between the iterations. Another definition states that Pacing is the delay time between the iterations.

What are 3 options available under pacing?

There are three options available for Pacing settings which as follows:

• As soon as the previous iteration ends.
• After the previous iteration ends.
• At intervals.

What is formula for pacing?

Expl. Throughput= Total No of Transactions/Time in Seconds , Pacing= (Response_Time + Think_Time) From Your Requirements- Total No of iterations 100 and 1 iteration have 6 transactions, So total no of transactions = 600. Throughput for 1 Minute is: 600/60 = 10 , Throughput for 1 Sec is: 0.16.

What is difference between pacing and think time?

Pacing in load testing refers to the time between the iterations of your test scenarios. This is unlike Think Time, which refers to the delay between actions or interactions inside iterations. Pacing allows the load test to better simulate the time gap between two sessions.

How do we calculate pacing?

So, I take the average pacing interval from the start of one iteration to the next and then adjust it by plus/minus 20%. So, your 360 ( 0:06:00 ) second pacing becomes a range from 288 seconds (0:04:48) to 432 seconds (0:07:12 ).

What is Little’s Law in performance testing?

Little’s Law is a very useful to define the workload model in performance testing.According to the Little’s Law: N=TPS*(RT+TT+PT) N = No of users (Expected virtual users) TPS= Transaction per second. ( if you have TPH-Transaction Per Hour value, divide it by 3600 to convert in to TPS).

What is 90th percentile in performance testing?

A percentile is a very useful performance testing metric that gives a measure under which a percentage of the sample is found. For example, the 90th percentile (abbreviated as p90) indicates that 90% of the sample is below that value and the rest of the values (that is, the other 10%) are above it.

How do you set pacing?

Implementing Pacing with Groovy Scripting

1. Create a thread group by Right Clicking “Test Plan” -> Add -> Threads (Users) -> Thread Group.
2. Create a HTTP Request Defaults config element by Right Clicking “Pacing Timer Example” -> Add -> Config Element -> HTTP Request Defaults.

How do you calculate pacing?

To calculate your running pace, divide the distance you ran with your running time. If you want to run a half marathon under two hours: Enter 2 hours and 0 minutes to Time.

What do you mean by pacing time in LoadRunner?

-Pacing is the time which will hold/pause the script before it goes to next iteration. i.e Once the Action iteration is completed the script will wait for the specific time (pacing time) before it starts the next one.

How is pacing used in a load test?

Pacing is used during load tests to make sure we are running the test with desired transaction per second. It’s the time difference between each complete iteration of business flow. It helps us to control the count of requests sent to the server per second.

How to set think time in LR in LoadRunner?

There are four settings available for think time settings in LoadRunner: 1. Ignore think time Choosing this option instructs the Vuser to ignore the given think time [lr_think_time ()] in the script and run the script without any delays in between two transactions.

How to calculate the time required for each iteration of Load Runner?

Total time required to complete each Iteration = x + 0.5 seconds = 1.5 + 0.5 = 2 seconds Verification: Let us verify if our above calculation is correct. So, Each User will perform 1800 transactions where we will provide 2 seconds for each Iteration to complete.