Constant throughput timer in jmeter. 1. Constant throughput timer in jmeter

 
1Constant throughput timer in jmeter  The following BeanShell commands could be used to change the test:If you need provide constant load at 300 requests per second rate - you'll need Constant Throughput Timer

How to add "HTTP Cache Manager" element? You can follow the below steps: 1. "Throughput depends on response time. The ability of the server in terms of how much load it can take. java:131. How to Use “ Constant Throughput Timer ” in JMeter Loadium · Follow 3 min read · Feb 22 Let’s think about an end-to-end scenario for an e-commerce website. The following BeanShell commands could be used to change the test:If you need provide constant load at 300 requests per second rate - you'll need Constant Throughput Timer. Open your JMeter script and right click on Thread Group. 1 % of the load and 1 trying to generate. Config Elements, b) a Thread Group (probably Ultimate), c) a Constant Throughput Timer (to limit the overall transaction rate), then d) 8 ThroughPut Controllers, and then INCLUDE the scripts in respective controllers, e) Listeners. Constant Throughput Timer is precise enough at minute level, so if you configure your test to last longer - you will see the throughput going down gradually and after 1st minute it should be throttled to your 100 requests per minute. Long time JMeter users had to try their tests on and on, finding exact number of threads and timer delays that produce desired number of requests per second (RPS) to server. Follow asked Oct 26, 2019 at 10:10. How to Use “ Constant Throughput Timer ” in JMeter. Throughout the Hold Load time(180sec) the requests will be looped. 10 000 requests in one hour is something like 166. Initial delay=0 Startup Time=250 Hold Load= 400 seconds Shutdown time= 250. 8,610 13 13 gold badges 104 104 silver badges 233 233 bronze badges. So if the server could not manage the load, it results in minimum throughput. Constant Throughput Timer added with throughtput = 10 and Calculate Throughput based on = all active threads. Throughput is calculated as requests/unit of time. Test Case 1: - 3 requests per minute - 1 request each 20 seconds. 0. I ran it for 10 mins. And one of them has an obvious title – “Constant Throughput”. And then execute the test we see that the execution of each sampler is delayed by 2000 milliseconds. Because 100 transactions per hour means one transaction each 36 seconds for 1 user and if you have 30 users the number will be proportionally less. In-depth Analysis: Throughput Controller in JMeter and Splitting Threads to Requests. 8K subscribers. I have a requirement that in ultimate thread group , constant throughput value needs to be changed for every 5 mins using beanshell pre-processor. Adding extra node will add extra 200 TMP. e. Add Constant Throughput Timer to your Test plan and configure it to send 30000 requests per minute (500 requests per second) Make sure that all the Samplers are in the Constant Throughput Timer's scope and you have. In planning our load tests, our goal is often to measure whether or not our application (not just the. Click Add –> Timer –> Constant Timer. Throughput Shaping Timer. 039 ( As shown in the above figure) The delay of each sample is 5000 ms. 1. apache. A Constant Throughput Timer will look like the picture above. jmeter. Constant Throughput Timer will let you control the flow of requests to be. Before understanding the semantics of throughput, let’s look at the concept. 5. Oct 10, 2022 at 7:06. Try running your test with 1 virtual user. If your goal is to mimic real users behavior as close as possible -. Constant Throughput is a calculator that checks the number of requests per time unit. 1 Answer. e. Khi đó bạn sẽ cần sự trợ giúp từ hàm _Ramdom của JMeter. 2. 2. If your application can only serve 1000 requests per minute - you will have 1000 requests per minute no matter how many threads you have in the Thread Group or how many requests per minute you specify in the Constant Throughput Timer. apache. 7 requests per second. I want to measure the response time of this 100 users login which I've. 2. If your script keeps hitting timeouts and includes these elements, remove or disable them unless they are important for your functional test scenario. I am using a Constant Throughput Timer with "Calculate throughput based on: all active threads in current thread group" selected. We would like to show you a description here but the site won’t allow us. I use JMeter for web testing. 2. Constant Throughput Timer: Constant Throughput Timer presents random delays between requests in a manner that a load/stress of necessary throughput is sent to the application. Both the scenarios you have mentioned may require thinking for a moment that there's something fishy if they both use a different unit of time. This can be used to add some delay/think time between each request. Constant Throughput Timer is used for pausing the threads to slow down overall execution speed to reach the target throughput. For different time of the day I'd use a different throughput value. Share. Start RPS End RPS Duration 1 10 3600 2 4 3600 2 8 3600 Total Number of Users- 300 ; Ramp Up 600 Seconds ; Duration of Test 10800 Seconds. And one of them has an obvious title – “Constant Throughput”. host, port – jmeter’s host and port for the machine, where it is running. org; The function of timers is to delay the requests. Despite its name Constant Throughput Timer doesn't need to be "constant", you can define the desired throughput via JMeter Property using __P() function like ${__P(throughput,)} and amend the property value using i. If I disable the constant-timer, I can see all the request being made in the span of 1ms: Share. What do you mean by "total transactions"? If you want to send 30 requests in 15 minutes more or less evenly distributed you need to use Constant Throughput Timer instead of the Synchronizing Timer and configure it to send 2 requests per minute. Remember 2 things: Constant Throughput Timer is precise enough on minute level, make sure your test lasts long enough so it could be. Constant Throughput Timer is available out of the box with JMeter. Gaussian Random Timer. First of all, Constant Throughput Timer can only pause JMeter threads in order to limit JMeter's throughput to the desired value. Constant Timer: 5000 ms (as configured) End Time of this sample is = 22:05:01. 0 requests/minute is saved as 0. Improve this answer. If your application can only serve 1000 requests per minute - you will have 1000 requests per minute no matter how many threads you have in the Thread Group or how many requests per minute you specify in the Constant Throughput Timer. I have a cloudsearch endpoint on AWS. GitHub Repo: that the most simplest ways to control throughput in your tests is using either standard "out-of-box" Constant Throughput Timer or custom Throughput Shaping Timer from jmeter-plugins collection. I use JMeter for web testing. It will also give you the saturation point and the bottleneck in case. If our server is not able. Uniform Random Timer The uniform random timer causes each thread to wait for a random time. Constant Timer adds a delay after the request completes (not after start), which doesn't fit either. jmeter. You can try setting the number of threads to i. If you server is able to respond in constant response time then throughput will remain the same for a given number of clients (threads). 3. HTTP Sampler ii. My test config in jmeter. In case of scenario 2 you'll need Constant Throughput Timer. Simply set the wait_time = constant_throughput (0. Constant Throughput Timer. Constant Throughput Timer can only pause the threads to the desired throughput so if you want to achieve 10 requests per second with 20 users your application must be at most 500ms, if it will be higher - the number of requests per unit of time will be proportionally less. Constant Timer. Constant timer means the interval between each request is a fixed value. "Time cap" is not a term used in the JMeter docs, but assuming what you mean, it can be set between loops by using Test Action or other JMeter mechanisms if. Example: If Constant Delay Offset is given 1000 and deviation is given 200 then Gaussian Random Timer will generate the random number in the range. Long time JMeter users had to try their tests on and on, finding exact number of threads and timer delays that produce desired number of requests per second (RPS) to server. timer. I think that you're misusing Constant Throughput Timer. 0. It seems that the Constant. Given here are some JMeter listeners that you can use for this purpose: Summary Report Aggregate Report Aggregate Graph Graph Results. Now, add the Constant Throughput Timer. We will conduct a sample load test with 100 concurrent users (threads) and evaluate the throughput value. 让线程暂停一个随机时间。由两部分组成: Random Delay Maximum 随机延迟部分; Constant Delay Offset 固定延迟部分; 实例: 1、添加线程组,添加 Uniform Random Timer ,添加HTTP请求,设置固定延迟部分未2000毫秒,随机延迟部分在2000ms。也就是线程延迟在2-4s之间For example, if you need 100 RPS, then “Target Throughput” value should be 6000/min in Constant Throughput Timer. JMeter BeanShell Timer is a scripting-based timer. JMeter Throughput by Example. With Constant Throughput Timer you can only pause JMeter throughput (number of requests per minute) to the desired rate but it works precisely enough on minute level, if you need second-level. I want to use the Throughput Shaping Timer using JMeter API in my java code. Constant Timer with a Thread Delay of 5 milliseconds. I would suggest going for Constant Throughput Timer. If you need to limit JMeter throughput to 60 requests per second only you can do it using Constant Throughput Timer: Add Constant Throughput Timer to your Test Plan ; Set "Target Troughput" to 60; Set "Calculate Troughput based on" to All active threads; This way JMeter will "pause" its threads (virtual users) to slow them down to 60. The above configuration will add a 5-second delay before the execution of each sampler, which is in the Constant Timer’s scope. In addition, these timers are used for simulating the real user think time. Second, it works precise. TestElement. If you want JMeter to run 5 concurrent samplers each minute you need to go for different setup, to wit: Your Sampler. If you get response times comparable to what you see in Fiddler. Let’s see how we can use constant throughput in JMeter as follows: With the help of constant throughput, we can keep constant time. JMeter Constant Throughput Timer. 4K views 2 years ago Learn Apache JMeter Series. – EBDS. testelement. 目标吞吐量(target throughput)单位是每分钟发送的请求数. Add a Test Action Sampler In the "Duration (milliseconds)" field, set the value as simply $ {mydelay} Right Click Test Action Sampler > Add > Timer > Beanshell timer. Timer in JMeter is easy but crucial part of JMeter where we have to manage the thread user count and time to apply the load to the application. The JMeter docs in 3. Target throughput (in samples per. Share. g. On top of that, it tries to maintain the exact amount of arrivals for a given timeframe ( throughputPeriod ). Despite word "constant" in its name, you can use i. Constant Throughput Timer can. One widget at a time is passed through a machine that stamps it with a label. These timers will pause the threads and try to achieve the specified throughput value. The Constant Timer is self-explanatory: it delays each sampler by a constant Thread Delay value. Concurrency depends on your test plan and application response time. Do not select "This thread only" value for Timer added at root, as it will change the result. The constant throughput timer delays the request to ensure that JMeter does not perform more requests than specified. e. . I think it will be more accurate than looking at locust's current_rps tracker, especially at low load. Ramp-up is the time for JMeter to kick off the virtual users from point 1. Apache JMeter is an open source Java based tool that enables you to perform functional, load, performance and regression tests on an application. Constant Throughput Timer will limit JMeter to the desired rate which will give you 10 000 requests in hour (assuming your application will be able to handle the requests fast enough) In the majority of cases it's easier to use custom Thread Groups such as Ultimate Thread Group. Second I would recommend checking whether your system under test has enough headroom in terms of resources (CPU, RAM, Network, Disk, etc. You may need to try it out in a few runs to find the optimum value of sleep time to get the desired throughput. e. Basic Timers: Constant Timer → the most basic timer type which adds a simple delay to your test with no other parameters. I used 80 threads and set a Constant Throughput Timer and Variable throughput timer and i set 10 transactions per second and i when i get Jmeter logs i see max 4 transactions per second . In the JMeter script, Constant Timer is used to add a constant delay before processing a sampler. Constant Throughput Timer. This capability is really helpful for debugging tests in real time. 3. I have used the constant throughput timer before, also as child of certain requests. To apply a timer to a single sampler, add the timer as a child element of the sampler. 4. For example, a Bean shell timer is usually used to give delay time or think timer in between sampler requests. Before understanding the semantics of throughput, let’s look at the concept. And if you changed load generator machine or server. Let’s think about an end-to-end scenario for an e-commerce website. This plugin is specially designed to schedule RPS loads. Precise Throughput Timer. With 100 threads you will get 50 requests per second. So you need to supply the sufficient amount of threads in the Thread Group. JMeter Constant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput. it worked. If the request took 1000 mSec, it will apply 4500-1000 = 3500 mSec as the pacing. Throughput Shaping Timer. Thread Group 3. See How to use JMeter's Throughput Constant Timer for details. To achieve this look at the Constant Throughput Timer. If the machine stamps sixty widgets in one minute, it’s throughput is one widget per second. Constant Throughput Timer is only capable of pausing JMeter threads in order to slow them down to reach the target throughput. If you set its value as “1. Gaussian Random Timer. Other timers may impact constant throughput timer target, so it is recommended not to use other timers. By the way, there is an extended. JSR223 Timer. It pauses the execution of test for a specified constant amount of time. Now, add the Constant Throughput Timer. 下面举例来看看如何做到以固定吞吐量发送请求,创建一个JMeter脚本,加入了若干thread only表示对单个线程生效。. You are right that Concurrency Thread Group is missing features of Stepping. jmeter里面不可以直接控制吞吐量,但是我们可以通过操作并发数变相改变吞吐量。. Bạn sẽ nhập 1 giá trị ngẫu nhiên vào Constant Timer thay vì giá trị cụ thể. Changing this consistent worth during the test is additionally. I think the documentation was before Ultimate Thread Group was introduced. Constant Throughput Timer : The Constant Throughput Timer is like the Precise Throughput Timer, except that it has fewer settings. Constant Throughput Timer can only pause the requests to limit JMeter samplers execution rate to desired value, it won't kick off any extra threads if the current throughput is lower than expected. Improve this question. (1)Number of Simulated Users to Group by:模拟用户的数量,即指定同时释放的线程数数量,若设置为0,等于设置. 0 (inclusive) and 1. Assuming there is only one request (sampler) in your Thread group and you are using the setting "All Active Threads" in Constant Throughput Timer. The different types of timers available in JMeter are – Constant Timer, Gaussian Random Timer, Uniform Random Timer, Constant Throughput Timer, Synchronizing Timer, Beanshell timer, BSF Timer, etc. 1. Actually I use a constant throughput timer to keep the frequency constant. QAInsights. The constant timer is one of the most widely used timers in JMeter. The test run may be shorter as if. และเราสามารถใช้ Constant Throughput Timer ในการกำหนดจำนวน request ต่อนาทีที่เรา. Introduction to JMeter Throughput. 0 Calculate Throughput based on: all active threads in current thread group So now, in 1 minute, JMeter will try to send 3000 requests and in 5 minutes, request count will be more or less around 15000. 1) with Constant Throughput Timer value as 1200/min with "All active threads" and Timer added at the root of script. -> Ultimate Thread Group: Start Thread Count-100 ->Startup time-120 ->Hold load for-120 ->Shutdown Time-60 -> Constant Throughput Timer- Target Throughput(1200/min). You can specify the pause in ‘Thread Delay’ field. Throughput value in the Constant Throughput Timer can be changed to different values by using a variable. JMeter Constant Timer, Constant Throughput Timer. Step 3. 038. throughput property as: ${__P(throughput,)} "tell". apache. This would allow you to adjust it via Command Line in real time, as the test script is being executed. A JMeter Timer is a built-in plugin tool for JMeter that can help with spacing out your sample requests. can only pause the threads to limit the throughput (requests per minute) to the desired value. Despite word "Constant" in its name it doesn't have to be constant, you can put a JMeter Property in the "Throughput" input field and change it on the fly. Thanks @Dmitri. iii. HTTP is a stateful protocol, it means that JMeter's HTTP Request samplers wait for response prior to sending a new request so. To get request running each 5 seconds set "Target Throughput" to 12 requests per minute (1 request each 5 seconds) So you will have requests firing as per your requirement: For request which needs to be executed once per 5 minutes do the same but set "Target Throughput" to 0. Constant Throughput Timer. This video features Precise Throughput Timer in #JMeter. Nested Class Summary. I ended up using constant_throughput to control the number of requests per second. The performance bottleneck of target app. Constant Timer. The Uniform Random Timer pauses the thread by a factor of: The next pseudorandom uniformly-distributed value in range between 0. The first thread group randomly picks one of several. Hot Network QuestionsThe formula is: Throughput = (number of requests) / (total time). e. Throughput Shaping Timer per se can only pause JMeter threads to limit execution rate to the given number of requests per second. Constant Timer at Thread Group level. I have constant throughput timer which will hit 1 request in 3 minutes in my test plan due to this my requests are getting timeout as it is delaying requests to 1 hour. So you need to supply the sufficient amount. Introduction. JMeter Constant Throughput Timer Example. 1. Synchronizing Timer 同步定时器. If you want to limit your test. However, I want to make requests as a single user. at org. 1. 3. Constant Timer with a Thread Delay of 5 milliseconds. Constant Throughput Timer treats samplers individually therefore you need to multiply the throughput for the transaction by the number of its children samplers, i. With regards to point 1 be aware that Constant Throughput Timer can only pause threads in order to limit JMeter's throughput to the desired number of requests per minute. ramp up to 6000 samples per min and so on up to 20000. The total number of threads in the Ultimate Thread Group will be 250. Constant Throughput Timer. Constant Throughput Timer: Java 8 incompatibility #3368. You could make the target throughput a variable too. We highly recommend using the Uniform Random Timer. 2. You can also use a JMeter Function or Variable in the “Thread Delay” input. Concurrency Thread Group doesn’t provide the ability to define initial delay, step transition and ramp-down - which the Stepping Thread Group does. This is "closed workload" approach, and it has major drawbacks (see here why). See Also: Serialized Form. This includes any intervals between. Select it and you will see 3 fields as below. 2. Throughput depends on response time for fixed set of users (threads). I have already referenced the class file called VariableThroughputTimer. This timer tries to maintain a constant throughput throughout the test and achieve the target. Doing the math, it should send a request every 5 milliseconds, and being 200 Threads, it should send 200 requests/second (200*5 = 1000ms). Also Constant Throughput Timer works on minute level and your desired throughput should be. A constant throughput timer in JMeter is used to achieve the actual output by computing the total number of requests. Maybe I'm wrong here, but this should be samples per minute, so 200. Constant Throughput Timer treats samplers individually therefore you need to multiply the throughput for the transaction by the number of its children samplers, i. Constant Throughput is a. Also, JMeter tries to set the throughput per minute, so tests should be longer then 1 or 2 minutes with that timer. Here is my script detail:->Simple Login request. The constant timer is the basic timer among all the given ones. Plus “Constant Delay Offset”. So the Sample 3 should start at the time is 22:05:07. jmxaccording to jmeter manual ramp up is: How long JMeter should take to get all the threads started. Recording scripts is where you will spend most of your time. Select it and you will see 3 fields as below. Use CTT in Test Plan level,not in thread group level. 0. Constant throughput timer (Timer) jmeter; Share. g. So the scenario is the next: Attempt to log in with invalid params in a loop. Also, it works only on a minute level so you need to properly calculate the ramp-up period and let your test run long enough. Precise Throughput Timer allows you to reach and maintain the desired throughput (number of requests per given amount of time) Gaussian Random Timer - allows you to simulate "think time". If your goal is to execute X requests per second - go for one of the following test elements: Constant Throughput Timer; Precise Throughput Timer (available since JMeter 4. Nested classes/interfaces inherited from interface org. This way, You can use constant throughput timer in your load test plan to achieve. When the throughput is saved to a CSV file, it is expressed in requests/second, i. Solution 1: You can use Stepping Thread Group (allows to set thread number increase stages over set periods of time) with Constant Throughput Timer in it. jsr223 request Constant Throughput Timer - 100 rpm. I have tried JMeter with a constant throughput timer with throughput = 1500000 per second and running 1000 threads. Also be aware that: Although Constant Throughput Timer accepts value in Requests/min and you are saying that you will use 120/sec, so you will have to provide a value of 7200 in Constant Throughput Timer to achieve 120/sec. Please suggest what should be the workaround of it? You can go for Constant Throughput Timer, despite the word "constant" in its name it doesn't have to be constant, you can use __P() function for specifying the desired throughput and amend it from Beanshell Server, another Thread Group, using JSR223 Test Elements, etc. Throughput Shaping Timer is a plugin and you need to install the plugin. Use Precise Throughput Timer. タイマーがない場合、JMeterは数分の1秒で次のリクエストを送信します。. Given you use Concurrency Thread Group it makes more sense to switch to Throughput Shaping Timer which can be connected to the Concurrency Thread Group. Constant Timer) as a child of the 2nd request. 1. The application. 1. Name: To provide the name of the timer; Comments: To provide arbitrary comments (if any); Number of Simulated Users to Group by: This attribute is used to define the number of threads to release at a time. Follow edited Mar 4, 2021 at 7:35. Jmeter: Constant throughput Timer with Ultimate Thread Group. Constant Throughput Timer; Don't use GUI to run JMeter tests as it might have very negative impact on test results, JMeter GUI is only for tests development and. JMeter acts as follows: It starts all threads within specified ramp-up period. This is "closed workload" approach, and it has major drawbacks (see here why). This time you will be able to correlate increasing load with other metrics like response time, throughput, number of errors, etc. During this Test(while loads are held) , I am sending another set of login requests from the different machine (say for 100 users). One of the most commonly used timers in JMeter, the Constant Throughput Timer enables you to decide how many samples should be executed per minute. jmeter. Constant Throughput Timer is available out of the box with JMeter. Constant Timer at Thread Group level. In actual execution, in 1 hour. This is used when we want each thread to wait for the same amount of time. This is what we need to control request frequency. It in a way reflects the capacity of the server. Tổng kết 2 Answers. Constant Throughput Timer; Throughput Shaping Timer; Precise Throughput Timer; Random number of messages in the request body payload: in both tools you will have to write some code for this, in LoadRunner you basically have to write the code for everything, in JMeter you can add JSR223 PreProcessor and use Groovy. i can see response times over 40 seconds. How to calculate. If you have 10 virtual users which can be executed at rate of 10 requests per second you will not be able to reach 20 requests per second without. Remember 2 things: Throughput Timer isn't able to create threads, it can only slow them down so make sure that you provide enough threads to reach desired target throughput July 1, 2023 by PerfMatrix. Constant Throughput Timer is precise enough on minute level so you might need to adjust your ramp-up period or consider using Precise Throughput Timer instead Constant Throughput Timer can only pause the threads to limit JMeter's requests execution rate to the given value so make sure to supply sufficient amount in the Thread. log is actually included in the bzt. Built into JMeter, there are 9 different types of timers available: ‍. JMeter: Not enought delay between HTTP samplers. Constant Throughput Timer config: Target Throughput is 600. You can use Constant Throughput Timer or Throughput Shaping Timer in order to limit JMeter's throughput to the given numbers and see whether it will be able to complete 10k requests in 1 hour or not. It is not necessary to have a separate HTTP header manager with each request unless request needs a unique header. JSR223 Timer. I want to change the expected request. Total no of transactions = 40 (100 requests) Duration = 5m i. The test-plan includes a Constant Throughput Timer which is defined in terms of a property, e. Now let us see in brief about some commonly used timers of Jmeter. Add Constant Timer as a child of the first request and configure it to introduce "sleep" for 30 minutes: in this case the delay will be introduced before first request, see A Comprehensive Guide to Using JMeter Timers article for more information. The threads in my thread group. There are 2 important elements which help to emulate the goal-based scenario when the number of requests is known and the target to achieve. Constant Throughput Timer has 2 main limitations: It is accurate enough on minute level so you need to ensure that your test is running long enough (minute or more). In my test plan I'm using a ThreadGroup with 5 threads, a HTTPRequest Sampler and a Constant Throughput timer with target set as - ${__P(throughput, 100)} for all active threads in current threadgroup. I am developing a JMeter Script according to the below requirement. I have used "jp@gc - Throughput Shaping Timer" But unable to achieve expected TPS. log. I have single thread group with 40 users. JMeter configuration and start from the command line. Throughput increased by factor of 2. N. As you see, no other timers except Througput shaping timer. 1. Select it and you. However it is precise enough only on "minute" level so you might need to play with ramp-up period. Follow answered Oct 22, 2015 at 16:42. e. The Constant Timer can be used to pause each thread for the same “think time” between requests. Also its effect is not immediate so during 1st minute of your load test you need to control virtual users arrival rate using Ramp-Up Period setting on Thread Group level. For instance 200k requests per hour is more or less 55 requests per second, if your application response time is 1 second - you will need 55. So in total you will have approximately 50 + 5 samplers, the actual amount will vary depending on your response time. Comment. Synchronizing Timer: mình đã nói ở bài viết Nhiều user thực hiện một hành động đồng thời trên jmeter; Constant Throughput Timer: có vẻ giống với Synchronizing Timer, mình chưa dùng bao giờ. Boundary value Extractor iv. Gaussian Random Timer. Para poder realizar esto utilizando solamente JMeter, se encontró que el único elemento que permite modificar el throughput en tiempo de ejecución es el Constant Throughput Timer. So you will get 10 threads up and running only by 19th second. Poisson Random Timer. Follow asked Nov 1, 2022 at 13:41. 2. Nested Class Summary. Running Jmeter script by targeting 1000 requests per second (Business SLA) hence used 'Constant Throughput Timer' or 'Throughput shaping timer' as suggested in below queries. The following is the list of JMeter 4. That means 40 samples has been executed in 1 minute. GitHub Repo: It has mentioned that constant throughput variable value can be changed using a JavaScript or BeanShell function to provide a changing value. You need to run Sampler(s) at rate of 600 per minute so this is what you need to specify in the Constant Throughput Timer. Total Http Requests - 24, Total Http Request/min - 12, Test Duration 2min, Waiting. 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.