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 Timer: Constant Throughput Timer presents random delays between requests in a manner that a load/stress of necessary throughput is sent to the application. This video features #Constant #Throughput Timer in #JMeter. Below screenshot is list of all Timers provided by JMeter to control the load. However, in one case I need an additional constant timer because I need to wait a certain time between two requests. We will also briefly look into the usage of JMeter’s Throughput Constant Timer. 2. jsr223 request Constant Throughput Timer - 100 rpm. Ramp-up is the time for JMeter to kick off the virtual users from point 1. 0. Throughput Shaping Timer. 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. In JMeter you can control the connect/response timeouts at the "Advanced" tab of the HTTP Request sampler (or even better HTTP Request Defaults) where you can increase the default timeouts to the desired values:. a) To maintain a constant throughput rate b) To simulate real user behavior c) To generate random data d) To pause the thread execution Answer: a) To maintain a constant throughput rate Explanation: The Constant Throughput Timer in JMeter is used to maintain a constant throughput rate by controlling the number of requests per. Concurrency Thread Group doesn’t provide the ability to define initial delay, step transition and ramp-down - which the Stepping Thread Group does. You can specify the pause in ‘Thread Delay’ field. So you need to supply the sufficient amount of threads in the Thread Group. So your approach with different Thread Groups is valid. Constant Throughput Timer is only capable of pausing JMeter threads in order to slow them down to reach the target throughput. 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. 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. at org. Let’s think about an end-to-end scenario for an e-commerce website. Precise Throughput Timer. jmeter_loc – the full path to the root jmeter folder. Issue: If i run the test, I was expecting the min throughput of 15 requests/sec - upto 16 requests /sec. e. either execute this 100 times OR. Thread group elements are the beginning points of any test plan. Típicamente, para modificar la carga en una prueba se suele variar la cantidad de UVs (Usuarios Virtuales). Now, add the Constant Throughput Timer. Below timers are used to implement pacing in Jmeter to achieve the desired load/Business transactions. For ex. TestElement. 1. Constant throughput timer not working properly. control. See How to use JMeter's Constant Throughput Timer. Add Flow Control Action sampler after the last requestJMeter provides HTTP header manager element to attach that additional information along with the request. Constant Throughput Timer will let you control the flow of requests to be. However, I want to make requests as a single user. The constant timer is the basic timer among all the given ones. Precise Throughput Timer is more "precise" but a little bit harder to use as you need to provide controlled throughput. Constant Timer: This is one of the most popularly used timer in JMeter. As per JMeter Glossary: Throughput is calculated as requests/unit of time. A Constant Throughput Timer will look like the picture above. X * Random Delay Maximum + Constant Delay Offset| where X an be the. Constant Throughput Timer. BSF Timer. 2. As per documentation: Set Target Throughput = 40. 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). This implies per minute 10 requests will be executed. The thread delay is a constant in milliseconds: Uniform Random Timer: One step above the basic. or Users - 2000. You can consider switching to Concurrency Thread Group and Throughput Shaping Timer. Timers can only pause JMeter samplers execution rate in order to limit JMeter's throughput to the desired value so you need to supply sufficient number of threads in the Thread Group. With 100 threads you will get 50 requests per second. This timer tries to maintain a constant throughput throughout the test and achieve the target. JMeter slaves are totally independent beasts hence they don't know anything about each other so both nodes will produce 200 TMP therefore you will get 400 in total. Created attachment timer. If you want to limit your test. 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. 1 % of the load and 1 trying to generate. Precise Throughput Timer. 可以使用常数吞吐量定时器 (Constant Throughput Timer)来实现。. Trong bài này , ta chỉ tập trung vào Constant Timer thôi vì theo mình nó là đơn giản nhất. So if the server could not manage the load, it results in minimum throughput. For each thread, the variable will be assigned one of the values from the series in sequence. 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". 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. If you get response times comparable to what you see in Fiddler. Nested classes/interfaces inherited from interface org. For different time of the day I'd use a different throughput value. e. If you need to use the same common steps in several Thread Groups. Request Oriented Goal: In such types of goals, we need to achieve the defined number of requests in an hour. Use 0 for truly random delays and a positive integer for constant. How do you expect the timer to "work" given you have only one thread and one iteration in the Thread Group especially given your test finishes in 500 milliseconds and you configured the test duration as 500 seconds. You can add this element to your test plan by following “Thread Group -> (right click) -> Add -> Timer -> Constant Throughput Timer” path. Unless you're doing spike testing you should be increasing the load gradually as if you release all the users right away you will get much less information and in case of gradual increasing the load you will be able to correlate it with increasing response time and. Share. 6 requests per minute or 2. Because JMeter sometimes displays throughput in per minute and sometimes in per second, whereas the hits per second is always per second. It in a way reflects the capacity of the server. Timers provided in JMeter Constant Timer. Doing the math, it should send a request every 5 milliseconds, and being 200 Threads, it should send 200 requests/second (200*5 = 1000ms). So basically throughput is the number of requests which JMeter was able to within test duration time frame. This will ensure that request is made minimum 100 per minute. See How to use JMeter's Throughput Constant Timer for details. That means 40 samples has been executed in 1 minute. In case you have only 1 request as in your scenario then it will generate Throughput of 20 request/sec (sometimes 20. And I set Loop Count: forever. For example: 1000 target threads with 1000 seconds ramp-up: JMeter will add one user each second18. So first of all try increasing the number of threads; Make sure to follow JMeter Best. Here are the workarounds: Calculate the number of threads you need to achieve your. 0” your. JSR223 Timer. Constant Timer. 4. If it is added at the Test Plan level then it acts as a global timer and the delay is added for all the samplers before the process. Here are the workarounds: Calculate the number of threads you need to achieve your target. It seems that all the configurations were correct, but the actual number of requests in the constant throughput timer was too low. tgz (or whatever version you downloaded) Change into the unzipped directory: $ cd apache-jmeter-5. . 0); Throughput Shaping Timer (can be installed via JMeter Plugins Manager); All above can pause JMeter threads in order to limit the throughput (requests per unit of. This plugin also works similarly to Constant Throughput Timer, which pauses the threads based on the target Throughput. I have given 7 transactions per minute with calculate throughput based on parameter as all active threads. variable variable. I currently need to execute a test with apache Jmeter that makes 400 requests per second. All of the "Timer" group of elements affect the script. 0. Add Constant Throughput Timer to your Test plan and configure it to send 30000 requests per minute (500 requests per second). 8,610 13 13 gold badges 104 104 silver badges 233 233 bronze badges. Remember - if the application itself is not supporting the desired throughput, jmeter can not help here. If the request took 1000 mSec, it will apply 4500-1000 = 3500 mSec as the pacing. Throughout the Hold Load time(180sec) the requests will be looped. JMeter - Timer - "Constant Throughput Timer" C onstant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput (Total Number of Requests). With Constant Throughput Timer, it sends more than 'n' requests per second. Recording scripts is where you will spend most of your time. 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. JMeter configuration and start from the command line. Right click Thread Group > Add > Timer > Constant Timer. If your application response time will be 2 seconds - you will get 200 RPS, 4 seconds - 100 RPS, etc. Jmeter measures throughput by observing the. To apply a timer after a sampler, either add it to the next sampler, or add it as the child of a Test Action Sampler. You can have one HTTP header manager at Thread level or none (as per request type). As the name implies, the thread group element controls the number of. If the request took 1000 mSec, it will apply 4500-1000 = 3500 mSec as the pacing. 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. If 0 is given then JMeter will release the same number of users which is defined in the thread group. Constant Throughput Timer will let you control the flow of. either execute this 100 times OR. This is used when we want each thread to wait for the same amount of time. 0. Click Add –> Timer –> Constant Timer. How to calculate. Other timers may impact constant throughput timer target, so it is recommended not to use other timers. As you see, no other timers except Througput shaping timer. 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. For example, this can be used to assign a distinct user id to be used by each thread. This is what we need to control request frequency. The Uniform Random Timer pauses the thread by a factor of: The next pseudorandom uniformly-distributed value in range between 0. 0” your throughput during the test will be 1 request per minute. The application. 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. 1. Constant Throughput Timer - You can set the amount of Throughput (samples per minute) by adding a timer after the request to slowdown the script, so it fits the throughput value. For further detail check JMeter blog about Constant Throughput Timer. And if you changed load generator machine or server. This implies per minute 10 requests will be executed. Uniform Random Timer. 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. Constant Throughput Timer: acts precise enough on "minute" scale, if your test lasts less than minute it might not apply the throughput. Let's see a brief thought on this: To achieve the target throughput, you need to have enough. JRS223 Timer. Constant Throughput Timer will be enough for your scenario. Adding a constant timer on a transaction. JMeter Constant Throughput Timer Example. Throughput - the Throughput is measured in requests per second/minute/hour. This video features #Constant #Throughput Timer in. Constant Throughput Timer; JSR223 Timer #20. This component introduces pauses to the test plan in such a way as to keep the throughput as close as possible to the target value specified. It may decrease if other timers deny the constant. g. My website's expected performance is 200 concurrent users at 8 RPS. answered Apr 20, 2014 at 16:43. mirek (Bug 64928): Component impacted: Constant Throughput Timer Case: value of target throughput set to: ${__P(tpm)} (or any other variable/property) tpm value is not a valid positive float. A JMeter Timer is a built-in plugin tool for JMeter that can help with spacing out your sample requests. I want to use the Throughput Shaping Timer using JMeter API in my java code. How to Use “ Constant Throughput Timer ” in JMeter. getMaxThroughputAsInt(ThroughputController. Constant Throughput Timer is only capable of pausing JMeter threads in order to slow them down to reach the target throughput. 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. 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. As per documentation>. B. Throughput Shaping Timer. Constant Throughput Timer. Despite its name Constant Throughput Timer doesn't have to be "constant", you can define throughput default value using __P(). The easiest way of controlling the number of requests per second (throughput) in JMeter test is using Constant Throughput 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. Constant Throughput Timer is only capable of pausing JMeter threads in order to limit the number of requests per second to the given value. Throughput Shaping Timer. jmeter; Share. 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Built-in Constant Throughput Timer; Throughput Shaping Timer from jmeter-plugins. It seems that the Constant. We know that JMeter is an open-source, free tool used to conduct load and performance testing on static and dynamic web applications. It pauses the execution of test for a specified. The constant timer is the basic timer among all the given ones. Gaussian Random Timer. One widget at a time is passed through a machine that stamps it with a label. 7. A good position would be a direct child of the Thread Group. 2. 0. Throughput Shaping Timer per se can only pause JMeter threads to limit execution rate to the given number of requests per second. java:131. 3. Before understanding the semantics of throughput, let’s look at the concept. Like this: Throughput Controller config: Based on is Percent Execution and Throughput is 20. The constant throughput timer delays the request to ensure that JMeter does not perform more requests than. Right click on "Test Plan" node. apache. 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. 4 requests per minute. Results Action Set Handler 4. Initial delay=0 Startup Time=250 Hold Load= 400 seconds Shutdown time= 250. 0. Each timer has a different application, which we have outlined here: Constant Timer: The most basic timer, this will simply add a delay to the threads before they are initiated. jmxaccording to jmeter manual ramp up is: How long JMeter should take to get all the threads started. Using JMeter, the constant throughput timer is particularly useful for this. 1. Apache JMeter is an open source Java based tool that enables you to perform functional, load, performance and regression tests on an application. If 20 users process 2400 records per hour and each record assumes 3 web page calls, it means that 7200 requests will be made in one hour which in its turn stands for 120 requests per minute (this is what you should enter into the timer's "throughput" area) or 2 requests per second. We will now demonstrate the usage of throughput in the load testing. Constant Timer; Uniform Random Timer; Precise Throughput Timer; Constant Throughput Timer; Gaussian. Precise Throughput Timer. Throughput Shaping Timer. Oct 10, 2022 at. Select it and you. So you need to supply the sufficient amount of threads in the Thread Group. Results: The JMeter Timers available are as follows: BeanShell 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. I ended up using constant_throughput to control the number of requests per second. Add 1. The above configuration will add a 5-second delay before the execution of each sampler, which is in the Constant Timer’s scope. 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. JMeter Constant Throughput Timer. I would say that these timers are mutually exclusive. 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. 10 000 requests in one hour is something like 166. It can be defined in terms of a variable or function call, and the value can be changed during a test. 2. Jmeter: Constant throughput Timer with Ultimate Thread Group. Constant Throughput Timer. 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 Constant Throughput Timer. it worked. 3. “Calculate throughput “ option can be varied based on the current thread, all threads in your test plan. 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. And then execute the test we see that the execution of each sampler is delayed by 2000 milliseconds. 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. Now check the time difference between the 1st sample and 11th sample, it is 1 minute. Throughput value in the Constant Throughput Timer can be changed to different values by using a variable or property. Sample Time of Sample 2 is 172 ms. While running test simulations, it is sometimes necessary to be able to specify the throughput in terms of the number of requests per minute. 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. 可以使用常数 吞吐量定时器 ( Constant Throughput Timer )来实现。. I would say that these timers are mutually exclusive. Constant Timer: To delay every user request for the same amount of time use Constant Timer. I can think of 2 reasons: Given 8 Thread Groups with 5 virtual users you're accessing your application with 40 concurrent users and it might be the case the application gets overloaded hence response time increases as concurrency increases. 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. Precise Throughput Timer → this timer will vary its delay interval to keep requests at or below a certain threshold. Precise Throughput Timer. Different Thread Groups having different number of threads; Throughput Controller; Switch Controller or Weighted Switch Controller plugins. Figure 01: JMeter Timer Elements Scope of JMeter Timer: 1. If it is added at the Test Plan level then it acts as a global timer and the delay is added for all the samplers before the process. JMeter Constant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput (Total Number of Requests). If your goal is to mimic real users behavior as close as possible -. Add Synchronizing Timer to the request and set Number of Simultaneous Users to Group by to X. In the JMeter script, Constant Timer is used to add a constant delay before processing a sampler. e. This plugin also works similarly to Constant Throughput Timer, which pauses the threads based on the target Throughput. 1 Answer. 1 Answer. Maybe I'm wrong here, but this should be samples per minute, so 200. 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. JMeter BeanShell Timer is a scripting-based timer. Remember 2 things: Throughput Timer isn't able to create threads, it can only slow them down so make sure that. This is what we need to control request frequency. And to manage throughput per minute you could use "Constant Throughput Timer". Use Cases. Share. Its called JMeter Throughput Constant Timer. Jmeter variable value update based on time. This blog post answers this questions and helps you build a JMeter test, step by step, to try it out. If the machine stamps sixty widgets in one minute, it’s throughput is one widget per second. A user logs in, goes to the main page, searches for a product, sees the results and goes to the detail page of one option. Except for /pdfbill (set to 50%), as we only want 25 concurrent users here instead of 50 users. 1 Answer. 1. ; Here I will quote only the introduction of these three techniques, for complete detail please go through the. How to create JMeter test with parallel execution in one thread group with specific throughput? 0. Download. Use Precise Throughput Timer. This component introduces pauses to the test plan in such a way as to keep the throughput as close as possible to the target value specified. The timers work as expected, I would say you're getting more or less equal throughput due to your application being overloaded and responding too slow, i. 1. Use Throughput Shaping Timer. JMeter provides lots of ways to record the value of throughput. The JMeter docs in 3. There are two different ways of pacing the requests: - delay each thread according to when it last ran - delay each thread. The purpose of the ‘Timer’ element is to pause a JMeter Thread for a certain amount of time. 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. Hướng dẫn sử dụng Timer trong JMeter – Add Precise Throughput Timer 2. Constant Throughput Timer Controlando el número de solicitudes por minuto (es decir, la forma de controlar el rendimiento) para controlar si se debe retrasar la pausa. Concurrent users are a different way of looking at application traffic. Example 1: you have submitted a request and it returns "pending" status. See How to use JMeter's Throughput Constant Timer guide for more details. 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". All controllers and samplers must be under a thread group. 1. Before we list these, it is important to state that they are the ones that come shipped with JMeter as standard, other custom timers are available, but these are the default: Constant Timer, Gaussian Random Timer, Uniform Random Timer, Constant Throughput Timer, Precise Throughput Timer, Synchronization Timer, BeanShell. 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. 6 requests per minute, in this case they will be evenly distributed. JMeter sends specific types of requests to the server; with the help of samplers, the thread group decides which request is required to. Actually you can just provide enough users and focus on controlling how often they will be sending requests via Constant Throughput Timer or Throughput Shaping Timer. 6. 1. All you need to do is to slow it down a little bit, one of the options is adding a Constant Throughput Timer. Constant Throughput Timer. Its called JMeter Throughput Constant Timer. Constant Throughput Timer added with throughtput = 10 and Calculate Throughput based on = all active threads. Plus “Constant Delay Offset”. " --- this is not entirely true. Apache JMeter is an open source Java based tool that enables you to perform functional, load, performance and regression tests on an application. Case 2: With sleep time (Using Constant Timer) In this case, throughput will be controlled by introducing sleep time in between threads. This will add Constant Timer at Thread Group level. 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. 一定のタイマーは、一定の遅延時間の値を追加することで構成できる一定の時間だけ次の要求を. 5K users or somewhere around it. You can try setting the number of threads to i. In case you have only 1 request as in your scenario then it will generate Throughput of 20 request/sec (sometimes 20. All you need to do is to slow it down a little bit, one of the options is adding a Constant Throughput Timer. Constant Throughput Timer is available out of the box with JMeter. Other elements, e. Constant Throughput Timer cannot force threads to execute faster, it can only pause threads to limit JMeter's throughput to the defined value. In this case, we are using a JMeter plugin – Throughput Shaping timer. Let’s see how we can use constant throughput in JMeter as follows: With the help of constant throughput, we can keep constant time. 1 Answer. You could make the target throughput a variable too. JMeter Constant Throughput Timer. My purpose is to to use Throughput Shaping Timer via JMeter API in my code programmatically. Use CTT in Test Plan level,not in thread group level. 1. In. Gaussian Random Timer A Gaussian Random Timer calculates the thread delay time. If it is added under a sampler then the parent sampler will wait for the defined time. If you want 30 transactions in total as fast as it possible - set the number of loops to the 30. Allocate the target throughput to required number (30 in this case). This is the function of Constant Throughput Timer. Other (and the main factor) is your application response time. Comment. jmeter. 039 ( As shown in the above figure) The delay of each sample is 5000 ms. The main goal of. Do not include multiple CTT in your test script as it will lead to a hoax. For Constant Delay Offset of 3000 ms and Deviation time of 300 ms, each thread of JMeter would execute after {3000+(0-300 ms (could be any value between 0-300 ms)}. If you look at JMeter's Thread Group you will see Specify thread lifetime input:. Constant Throughput Timer. Uniform Random Timer. So the options are in: Increase the number of threads in the Thread Group to i. However from what I can see from your Summary Report the majority of samplers are executed at rate of 3. The easiest way of controlling the number of requests per second (throughput) in JMeter test is using Constant Throughput Timer. 5. I ended up using a Test Action with 30s pause. 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. In case of scenario 2 you'll need Constant Throughput Timer. ramp up to 6000 samples per min and so on up to 20000. The JMeter Ramp-up Period is the amount of time in seconds it will take Apache JMeter™ to add all test users (threads) to a test execution. 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. JMeter Constant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput (Total Number of Requests). Save my name, email, and website in this browser for the next. 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. I have tried with below jmeter tools. If your workload patterns are more complex consider using Throughput Shaping Timer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？. 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. Simply set the wait_time = constant_throughput (0. 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. Constant Throughput Timer is available out of the box with JMeter. JSR223 Timer. Keep the think time to create a more realistic behaviour ( optional )It might be the case Constant Throughput Timer is not "precise" enough, given you need to limit JMeter's throughput to 15 requests/minute assuming 20 threads it's better to consider Throughput Shaping Timer which has lower granularity therefore it's being applied immediately and gives exact throughput figures comparing to the. Debug sampler throughput can go more than 100000/sec.