You could make the target throughput a variable too. Another factor is application response time as JMeter waits for the previous response before sending the. In the JMeter script, Constant Timer is used to add a constant delay before processing a sampler. 1. so in your plan, you add. How to create JMeter test with parallel execution in one thread group with specific throughput? 0. For the given scenario in sample scenarios image with duration 1hr , i tried to set the work load model as given below with the request hits 40000 and TPM 667:. My load would be held for 3 minutes. JMeter Timer Overview The purpose of all “Timer” test elements is pausing a JMeter Thread representing a virtual user for a certain amount of time. In JMeter, there are 9 different Timer types. 0” your throughput during the test will be 1 request per minute. Using JMeter, the constant throughput timer is particularly useful for this. All of the "Timer" group of elements affect the script. 3. I am developing a JMeter Script according to the below requirement. it worked. Skip to content Toggle navigation. This will add Constant Timer at Thread Group level. This ultimate thread group will give you more control over Threads. But if I place my requests in separate Thread Groups - Throughput Controller doesn't work. To add a timer element, we need to right-click on the Thread Group element and select Add, Timer, Constant Timer. This ultimate thread group will give you more control over Threads. So you must supply enough threads in the Thread Group to create more requests per second than you're trying to achieve and then limit the number of requests per second to the desired rate using. 20 requests per second. Constant Throughput Timer. Below you will find a categorized list of the most common timer elements included with JMeter. 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. 3. If you need to produce the load exactly 50 requests per minute - I would suggest going for Constant Throughput Timer which can pause the JMeter Threads in order to reach the target throughput. 1 Answer. In case you have only 1 request as in your scenario then it will generate Throughput of 20 request/sec (sometimes 20. JMeter also provides a timer component, ‘Constant Throughput Timer’, which you can use to set the value of Transactions per. 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. I am having 5 request inside that. Target throughput (in minutes): 3000. Let’s see how we can use constant throughput in JMeter as follows: With the help of constant throughput, we can keep constant time. This is the function of Constant Throughput Timer. 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". Except for /pdfbill (set to 50%), as we only want 25 concurrent users here instead of 50 users. Add Constant throughput timer to the thread group as shown below. And run the following to. Constant Throughput Timer. 866 + 172 + 5000 = 22:05:07. JMeter's Constant Throughput Timer can only capable of pausing the threads to limit the number of transactions per minute to the given value, if the current amount is not enough - it won't kick off extra threads. " --- this is not entirely true. If there are 10 threads and a ramp-up time of 100 seconds, then each thread will begin 10 seconds after the previous thread started, for a total time of 100 seconds to get the test fully up to speed. As a practical example, assume you have a long-running JMeter test running in CLI mode, and you want to vary the throughput at various times during the test. Poisson Random Timer. Updated February 14, 2023. 8,610 13 13 gold badges 104 104 silver badges 233 233 bronze badges. jmeter. e. A constant throughput timer in JMeter is used to achieve the actual output by computing the total number of requests. Remember 2 things: Constant Throughput Timer is precise enough on minute level, make sure your test lasts long enough so it could be. Dmitri T. Add Flow Control Action sampler after the last requestJMeter provides HTTP header manager element to attach that additional information along with the request. For example, if I set Constant Throughput timer throughput to be 60 per minute,. In. Adding a constant timer on a transaction. If it is added under a sampler then the parent sampler will wait for the defined time. -> Ultimate Thread Group: Start Thread Count-100 ->Startup time-120 ->Hold load for-120 ->Shutdown Time-60 -> Constant Throughput Timer- Target Throughput(1200/min). The constant timer has the following components. First of all ensure that you're following JMeter Best Practices as it might be the case JMeter configuration is not suitable for kicking off that many threads. org; The function of timers is to delay the requests. 0 requests/minute is saved as 0. Constant Throughput Timer is only capable of pausing JMeter threads in order to limit the number of requests per second to the given value. JMeter: Holding Session for a certain period of time. is correct, but if you leave it as is JMeter will execute requests as fast as it can. It exposes the following component properties that contain information about the duration and current state of the test where elementName will be the name of your timer. Precise Throughput Timer is more "precise" but a little bit harder to use as you need to provide controlled throughput. In Gaussian and Poisson random timer, the random number generation is based on the pre-defined function, but in the. 1. Throughput Shaping Timer. apache. The main goal of. If it is. Every timer has its own usability. If above information is not enough try to elaborate your query and include i. Click Add –> Timer –> Constant Timer. Use CTT in Test Plan level,not in thread group level. 1 % of the load and 1 trying to generate. JMeter sends specific types of requests to the server; with the help of samplers, the thread group decides which request is required to. thread numbers, target throughput and what kind of information needs. 0. I have given 7 transactions per minute with calculate throughput based on parameter as all active threads. Nested Class Summary. 5. This timer tries to maintain a constant throughput throughout the test and achieve the target. 0. 1). Constant Throughput Timer pauses active threads to reach throughput level you define. Constant Throughput Timer. As a result, it provides a different terminology to understand the application’s. I'm thinking that in my overall Test Plan, I will add all the a). 1000 and slowing the requests down using Constant Throughput TimerI've set up a jmeter distributed testing setup with one master and multiple slaves. 10 000 requests in one hour is something like 166. Constant Timer adds a delay after the request completes (not after start), which doesn't fit either. GitHub Repo: It has mentioned that constant throughput variable value can be changed using a JavaScript or BeanShell function to provide a changing value. 7 requests per second. Constant Throughput Timer; JSR223 Timer #20. 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. The time is calculated from the start of the first sample to the end of the last sample. JMeter is not capable of immediately stopping 1000 threads when the Throughput Shaping Timer reaches its duration limit, JMeter "tells" threads to stop one 1200 seconds pass and it might take a while to gracefully shut the threads down. Do not select "This thread only" value for Timer added at root, as it will change the result. e. 1 Answer. The difference between the uniform random timer and other two random timers (Gaussian and Poisson) are: 1. Tổng kết 2 Answers. Precise Throughput Timer. 可以使用常数 吞吐量定时器 ( Constant Throughput Timer )来实现。. 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。. if the transaction controller has 3 child samplers and you want the whole transaction to be executed 100 times/minute - you need to set the target throughput to 300 requests/minute. 1. The Constant Timer is self-explanatory: it delays each sampler by a constant Thread Delay value. Constant Throughput Timer can. It in a way reflects the capacity of the server. As I can see, Constant Throughput Timer ensures requests completion rate (for example, if I specify "2" in the timer, it will slow down the thread so that 2 requests are finished per minute) My test plan with Constant Throughput Timer. 可以使用常数吞吐量定时器 (Constant Throughput Timer)来实现。. 10 000 requests in one hour is something like 166. 0 and Calculate Throughput based on is all active threads. My test config in jmeter. It is important to get this peak throughput level correct because otherwise you either end up with a load that is too high (you waste time solving problems that are not problems) or too low (you don't find problems that are real problems) but if you already have. Given you have Loop Count set to 1 JMeter will shut down. While running test simulations, it is sometimes necessary to be able to specify the throughput in terms of the number of requests per minute. 039 ( As shown in the above figure) The delay of each sample is 5000 ms. i can see response times over 40 seconds. 4 requests per minute. Lets consider below load scenario for example: Total no of users = 5. So the formula is: |0. JSR223 Timer. Its called JMeter Throughput Constant Timer. Tổng kếtConstant Throughput Timer is the easiest of built-in test elements, 2 requests per second is 120 requests per minute. Precise Throughput Timer. In this example, a Constant Timer with 15000 milliseconds is used for sleep time. Constant Timer or Gaussian Random Timer or Uniform Random Timer or whatever. And to manage throughput per minute you could use "Constant Throughput Timer". 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. 1. Step 2. although the Timer is called the Constant Throughput timer, the throughput value does not need to be constant. Constant Timer: 5000 ms (as configured) End Time of this sample is = 22:05:01. Thread Group 3. I think it will be more accurate than looking at locust's current_rps tracker, especially at low load. If you want to execute 300 000 queries in 24 hours you need to introduce a rate limiting on JMeter side to execute 208. Configure the thread group with 10 threads and run for duration of 5 minutes (300 seconds)We will also briefly look into the usage of JMeter’s Throughput Constant Timer. 0. As the name implies, the thread group element controls the number of. I am adding throughput timer but then I need to set up. If current number of threads is not enough in order to. Trong bài này , ta chỉ tập trung vào Constant Timer thôi vì theo mình nó là đơn giản nhất. Constant Throughput Timer – to specify exact load to generate, i. Uniform Random Timer. If you want to send specific amount of requests during this hour consider using Constant Throughput Timer, but be aware of the following:. In planning our load tests, our goal is often to measure whether or not our application (not just the. Test Case 1: - 3 requests per minute - 1 request each 20 seconds. Remember 2 things: Throughput Timer isn't able to create threads, it can only slow them down so make sure that. And one of them has an obvious title – “Constant Throughput”. Given here are some JMeter listeners that you can use for this purpose: Summary Report Aggregate Report Aggregate Graph Graph Results. 1. JMeter threads model assumes waiting for the response prior to sending the next request, if your application won't be able to handle more than 30 requests per second there is no way to get 40 requests per second using HTTP Request samplers. Throughput timer is in root of test plan, Where as other timers are only applicable within scope of controllers. This will add Constant Timer at Thread Group level. Ok, so I have control over the below parameters in Apache JMeter: Number of Threads (users) Ramp-up period (in seconds) How do I test for varying sampling rate and not varying user addition rate? Even a fixed sampling rate would do. First of all, Constant Throughput Timer can only pause JMeter threads in order to limit JMeter's throughput to the desired value. Constant Throughput Timer will let you control the flow of requests to be. Constant Timer at Thread Group level. Hot Network QuestionsThe formula is: Throughput = (number of requests) / (total time). Concurrent users are a different way of looking at application traffic. This plugin also works similarly to Constant Throughput Timer, which pauses the threads based on the target Throughput. If 0 is given then JMeter will release the same number of users which is defined in the thread group. JMeter understand Thread Group / Throughput and INCLUDE. Ramp-up is the time for JMeter to kick off the virtual users from point 1. By the way, there is an extended version of the CTT. Concurrency depends on your test plan and application response time. To implement pacing in Apache JMeter™, we can use either use Groovy Scripting or one of these two timers: the Constant Throughput Timer or the Throughput Shaping Timer. Click Add –> Timer –> Constant Timer. I want to run this test for five or ten minutes. I ended up using constant_throughput to control the number of requests per second. Now if you want to control the rate of transactions per second or the number of samples to execute you can use Constant Throughput Timer. N. So the scenario is the next: Attempt to log in with invalid params in a loop. The most intuitive thing I could think of was using Constant Throughput Timer to control the number of requests sent,. July 1, 2023 by PerfMatrix. e. 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. The constant timer pauses the test execution for a constant period. If you need to use the same common steps in several Thread Groups. bsh_loc – folder, containing bsh-files. Throughput Timer allows you to set number of samples that thread can send per minute (e. 3. In this case JMeter will run 1 thread for 1 second and will try to execute as many requests as it can during this time frame. Concurrent users are a different way of looking at application traffic. Nested classes/interfaces inherited from interface org. Timer’s Present in JMeter. . It is often the first step to develop test plans for applications. Constant Timer. Constant Throughput Timer. 0. 12. Constant Throughput Timer will try to slow down JMeter's throughput to the defined value by sleeping for the period of time before executing the Sampler if. ramp up to 6000 samples per min and so on up to 20000. The constant timer is the basic timer among all the given ones. Target throughput (in samples per. We will also briefly look into the usage of JMeter’s Throughput Constant Timer. 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. Sample Time of Sample 2 is 172 ms. And if you changed load generator machine or server. Constant Throughput Timer is only capable of pausing JMeter threads in order to limit the number of requests per second to the given value. I use JMeter for web testing. 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. Nested Class Summary. Also, JMeter tries to set the throughput per minute, so tests should be longer then 1 or 2 minutes with that timer. The first thread group randomly picks one of several. Test execution result will looks like below for constant throughput timer jmeter example. （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. this is how you can control for how long JMeter threads are allowed to run. jmeter. e. Here are the workarounds: Calculate the number of threads you need to achieve your target. This class implements a constant throughput timer. Constant Throughput Timer: This timer define the number of sampled need to be executed per. e. The test-plan includes a Constant Throughput Timer which is defined in terms of a property, e. Essentially, it sticks with a target throughput very closely, and doesn’t allow for the flexible. The constant timer is one of the most widely used timers in JMeter. Uniform Random Timer. If we were to add a Constant Timer to the test and set the delay to be 2000 milliseconds. Uniform Random Timer. Pre Processors: allow you to perform operations/actions before. Improve this answer. Second, it works precise. 2. July 1, 2023 by PerfMatrix. Constant Throughput Timer: This timer. The total number of threads in the Ultimate Thread Group will be 250. “Calculate throughput “ option can be varied based on the current thread, all threads in your test plan. Jmeter: Constant throughput Timer with Ultimate Thread Group. Save my name, email, and website in this browser for the next. Constant Timer; Gaussian Random Timer; Uniform Random Timer; Constant Throughput Timer; Synchronizing Timer; JSR223. Test Plan 2. Name Email Website. In this case, we are using a JMeter plugin – Throughput Shaping timer. 4. If I disable the constant-timer, I can see all the request being made in the span of 1ms: Share. 2. Constant Throughput Timer introduces variable pauses, calculated to keep the total throughput (in terms of samples per. JMeter configuration and start from the command line. BSF Timer. If you need to execute 1000 requests in 60 minutes you need to run 16. This includes any intervals between samples, as it is supposed to represent the load on the server. Closed asfimport opened this issue Apr 25, 2014 · 5 comments Closed Constant Throughput Timer: Java 8 incompatibility #3368. 在JMeter中定时器用来设置延时和同步，以调节请求的发送速率，那么如何产生固定吞吐量的压力哪？可以使用常数吞吐量定时器(Constant Throughput Timer)来实现。 下面举例来看看如何做到以固定吞吐量发送请求，创建…Tool ที่เราใช้ในการทำ performance test ก็คือ JMeter ซึ่งเป็น tool opensource ที่เขียนด้วย Java. La principal diferencia entre estos dos temporizadores esta en que el CTT inserta un pausa constante mientras que el CTT. This is "closed workload" approach, and it has major drawbacks (see here why). Sorted by: 0. Gaussian Random Timer A Gaussian Random Timer calculates the thread delay time. jmxaccording to jmeter manual ramp up is: How long JMeter should take to get all the threads started. Gaussian Random Timer. See How to use JMeter's Constant Throughput Timer article for more details. ), you can do this using i. JMeter Constant Throughput Timer. Constant Timer or Gaussian Random Timer or Uniform Random Timer or whatever. The Throughput Shaping Timer plugin adds the following features to JMeter: The Throughput Shaping Timer element - a timer that sets the desired RPS schedule via the JMeter GUI. If you're using > 1 virtual user and uncertain regarding ramp-up settings consider using Throughput Shaping Timer which is more precise out of the box. Throughput Shaping Timer Properties. Constant Throughput Timer : The Constant Throughput Timer is like the Precise Throughput Timer, except that it has fewer settings. The test plan currently uses two thread groups and runs those in loops. I am using a Constant Throughput Timer with "Calculate throughput based on: all active threads in current thread group" selected. e. Doing the math, it should send a request every 5 milliseconds, and being 200 Threads, it should send 200 requests/second (200*5 = 1000ms). To see the full JMeter Timer List, click on the Thread Group -> Add -> Timer. The tail of this log (most recent 200 rows) can be viewed live while the test is running. if the transaction controller has 3 child samplers and you want the whole transaction to be executed 100 times/minute - you need to set the target throughput to 300 requests/minute. Boundary value Extractor iv. Step 3. Tool ที่เราใช้ในการทำ performance test ก็คือ JMeter ซึ่งเป็น tool opensource ที่เขียนด้วย Java สำหรับการทำ load test การจำลอง request จากหลาย user ที่เข้ามาพร้อมกันทำ. 1. Let’s think about an end-to-end scenario for an e-commerce website. Constant Timer) as a child of the 2nd request. Apache JMeter is an open source Java based tool that enables you to perform functional, load, performance and regression tests on an application. can only pause the threads to limit the throughput (requests per minute) to the desired value. To elaborate - if a Constant Throughput Timer is set to 1 sample, and 1 thread is created, then the Transaction Controller is still not considered a singular sample as far as CTT is. Different Timer Types. g. The Constant Throughput Timer. Step 2. JRS223 Timer. 4. Very silly mistake with a conclusion: Check your throughput value, test for longer periods. I do not want to "pre-decide" what throughput I want. Some commonly used JMeter Timers are: Constant Timer; Uniform Random Timer; Precise Throughput Timer; Constant Throughput Timer; Gaussian Random Timer; JSR223 Timer; Poisson Random. 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. All controllers and samplers must be under a thread group. These timers will pause the threads and try to achieve the specified throughput value. 0” your. Precise Throughput Timer. This implies per minute 10 requests will be executed. e. You can also use a JMeter Function or Variable in the “Thread Delay” input. Because JMeter sometimes displays throughput in per minute and sometimes in per second, whereas the hits per second is always per second. Precise Throughput Timer: siêu phức tạp, mình sẽ tìm hiểu rồi viết sau (hên xui) IV. Por ejemplo, cuando necesitamos mantener el servidor bajo cierta presión durante mucho tiempo, podemos controlar el rendimiento a través de este temporizador. Each having its own constant throughput timer . If you want to limit your test. The first request wil receive the correct amount of throuhput the first time, and so will the 2nd request. To achieve this I have configured a Constant Throughput Timer to 12000 requests per minute (active for. added a constant throughput timer to the ultimate thread group and gave the value as 480 requests per minute. Synchronizing Timer 同步定时器. Despite word "constant" in its name, you can use i. 1 Answer. Allocate the target throughput to required number (30 in this case). On top of that, it tries to maintain the exact amount of arrivals for a given timeframe ( throughputPeriod ). Gaussian Random Timer. testelement. If you get response times comparable to what you see in Fiddler. Gaussian Random Timer. 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. This video features #Constant #Throughput Timer in. 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. And if you changed load generator machine or server. The Constant Throughput Timer will add random pauses between requests during test execution to match the required throughput figure (samples per minute). With Constant Throughput Timer, it sends more than 'n' requests per second. Constant Throughput Timer can only pause the threads to reach specified "Target Throughput" value so make sure you provide enough virtual users (threads) to. Constant Timer. e. Another option is implementing pacing. Típicamente, para modificar la carga en una prueba se suele variar la cantidad de UVs (Usuarios Virtuales). I want to measure the response time of this 100 users login which I've. Results: The JMeter Timers available are as follows: BeanShell Timer. Constant Throughput Timer acts precise enough on minute level so expect your number of requests applied from 2nd minute and onwards. 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. Alternative options are: JMeter also provides a useful timer component to configure or set a constant throughput value to test the application load. Set the timer value to however many milliseconds you need (in your case 120000), and it inserts a delay between all requests in that thread group. If you choose to add more than one timer to a Thread Group, JMeter takes the sum of the timers and pauses for that amount of time before executing the samplers to. Gaussian Random Timer. 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. 0. Debug sampler throughput can go more than 100000/sec. The easiest way of controlling the number of requests per second (throughput) in JMeter test is using Constant Throughput Timer. ramp up to 6000 samples per min and so on up to. So basically throughput is the number of requests which JMeter was able to within test duration time frame. Go back to the "Test Plan" node. The Throughput Shaping Timer plugin adds the following features to JMeter: The Throughput Shaping Timer element - a timer that sets the desired RPS schedule via the JMeter GUI. Constant Throughput Timer. Example 1: you have submitted a request and it returns "pending" status. Click Add –> Timer –> Constant Timer. Add a relevant JMeter Timer (i. Since: 4. log. If the request took 1000 mSec, it will apply 4500-1000 = 3500 mSec as the pacing. Constant Throughput Timer (bộ hẹn giờ thông lượng không đổi) được sử dụng như một yếu tố định hướng mục tiêu giúp đạt được thông lượng mong muốn (tổng số yêu cầu). Constant Timer: This is one of the most popularly used timer in JMeter. This is the function of Constant Throughput Timer. In JMeter, the ‘Timer’ element simulates the real user behaviour of taking a pause on a webpage. is correct, but if you leave it as is JMeter will execute requests as fast as it can. The number of requests per second has to be controlled by using constant throughput timer (or the one from jmeter-plugins). 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. 6 transactions per minute. The test run may be shorter as if. However, a couple of advantages are the request bursts are more consistent in nature, and the samples lie very close to the median value, as can. I ended up using constant_throughput to control the number of requests per second. 3. Ramp-up is the time for JMeter to kick off the virtual users from point 1. 0. However, a couple of advantages are the request bursts are more consistent in nature, and the samples lie very close to the median value, as can. For example: Constant Throughput Timer: Precise Throughput Timer: Why even making use of the Constant Throughput Timer I sometimes get a number of requests higher than the value specify in the Target Throughput (21 in the above image) If a indicate a value of 21 in the Target Throughput , isn't this constant supposed to guarantee a maximum value of 21 requests? Hướng dẫn sử dụng Timer trong JMeter – Add Precise Throughput Timer 2. Use 0 for truly random delays and a positive integer for constant. Follow asked Oct 26, 2019 at 10:10. 0 (exclusive) Multiplied by “Random Delay Maximum”. I have used the constant throughput timer before, also as child of certain requests. Sorted by: 2. Constant Throughput Timer. S3E3 Learn JMeter Series - Constant Throughput Timer. View Results Tree 5. Created attachment timer. Share. Constant Timer with a Thread Delay of 5 milliseconds. Constant Throughput Timer. For example, if the number of threads is set to 10 and the ramp-up time is set to 100 seconds, JMeter will use 100 seconds to start and run 10 threads, and each thread will start 10 seconds after the previous thread was started. 0. Example configuration: Add Constant Throughput Timer as a child of the Login sampler. รวมถึง. Poisson. It is not necessary to have a separate HTTP header manager with each request unless request needs a unique header. A JMeter Timer is a built-in plugin tool for JMeter that can help with spacing out your sample requests. I would say that these timers are mutually exclusive. However, I want to make requests as a single user. you have 2 users and 2 seconds response time - the load will be 1 requests per second; you have 4 users and 2 seconds response time - the load will be 2 requests per second; etc. It can be defined in terms of a variable or function call, and the value can be changed during a test. A Constant Throughput Timer will look like the picture above. If for some reason you need to proceed with JMeter take a look at Constant Throughput Timer which can limit requests execution rate to the desired value. TestElement. referenced in the file. 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. Petr. Figure 01: JMeter Timer Elements Scope of JMeter Timer: 1. Constant Timer adds "think time" between requests, if you add the timer at the same level as all requests (see JMeter Scoping Rules for more details) - it means that JMeter will "sleep" for 2 seconds before each Sampler in the Timer's scope. can only pause the threads to limit the throughput (requests per minute) to the desired value. The timer tries to produce a constant.