Obviously, a larger window is needed for more complex models, see for example Measuring forecast accuracy, p. How large this should be depends on the complexity of the model you are fitting, so you have to research what minimum sample size is expected to get a reliable fit. So, the triggered request after 1 minute will be 45 (=5 x 3).InitialWindow: The size of the training set/window for the first modeling iteration. Let’s take an example: if there are 5 users with 5 samplers and target throughput value is set to 3 seconds then each thread will send 3 requests per minute separately. The overall throughput will be proportional to the number of active threads. this thread only: This option allows each thread to maintain it’s own target throughput irrespective of group.Description of the option is given below: Calculate Throughput based on: Choose an appropriate option as per the requirement.If you need to achieve 10,000 requests target in an hour then target throughput value will be around 167 (=10000/60). Target throughput (in samples per minute) : Number of requests that need to be triggered in a minute.Comments : To provide arbitrary comments (if any).Name : To provide the name of the timer.What are the input fields of ‘Constant Throughput Timer’? Select the appropriate element where you want to add the timer.Step-up and Spike Test scenario cannot be prepared using constant throughput timer.įigure 01 How to add ‘Constant Throughput Timer’ in JMeter script?.You need to decide the number of threads wisely so that a real-time scenario can be prepared.Once the test duration ends, then all the threads stopped even though they are in the middle of the iteration. The threads are not stopped in a graceful manner.The achieved target may be slightly high.To get the exact sampler’s count at the end of the test, you need to eliminate transaction’s count from the aggregate report to check whether constant throughput timer is working fine or not.Other timers may impact constant throughput timer target, so it is recommended not to use other timers.There are some of the limitations associated with this element like A Constant Throughput Timer works precisely on the “minute” level, so make sure that your test lasts long enough (1 minute or more) and you use a reasonable ramp-up time to avoid spikes (unless you’re doing some form of stress testing). If you want to execute a Goal-oriented scenario where the target is not to simulate the number of concurrent users, but the number of requests per second then Constant Throughput Timer is best for such type of scenario. Hence it is not recommended to use other timers along with the Constant Throughput Timer. Throughput may decrease if other timers contradict the Constant Throughput timer. Of course, if the server is not able to handle such a load, the throughput will be lower. This timer tries to maintain a constant throughput throughout the test and achieve the target. JMeter Constant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput (Total Number of Requests).
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