Case 2: With sleep time (Using Constant Timer) In this case, throughput will be controlled by introducing sleep time in between threads. When the throughput is saved to a CSV file, it is expressed in requests/second, i. July 1, 2023 by PerfMatrix. Let’s think about an end-to-end scenario for an e-commerce website. Built into JMeter, there are 9 different types of timers available: . Precise Throughput Timer: siêu phức tạp, mình sẽ tìm hiểu rồi viết sau (hên xui) IV. Constant Throughput Timer added with throughtput = 10 and Calculate Throughput based on = all active threads. JMeter Constant Throughput Timer. As you see, no other timers except Througput shaping timer. Constant Timer. In JMeter, the ramp-up period defines the time period within which all the specified users get in running state. Uniform Random Timer. This is what we need to control request frequency. 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. 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 understand Thread Group / Throughput and INCLUDE. I am adding throughput timer but then I need to set up. I would suggest going for Constant Throughput Timer. Constant Timer. 4. 1. Follow asked Oct 26, 2019 at 10:10. In JMeter, the ‘Timer’ element simulates the real user behaviour of taking a pause on a webpage. So first of all try increasing the number of threads; Make sure to follow JMeter Best. JMeter timers mainly include Constant Timer, Uniform Random Timer, Precise Throughput Timer, Constant Throughput Timer, Gaussian Random Timer, JSR223 Timer, Poisson Random Timer, Synchronizing Timer, BeanShell Timer. Given your setup the only way of having exactly 399600 samplers is using Throughput Controller in. The Constant Timer is self-explanatory: it delays each sampler by a constant Thread Delay value. 2. So the formula is: |0. I think that you're misusing Constant Throughput Timer. Có rất nhiều timers được cung cấp trong JMeter: Constant Timer, Gaussian Random Timer, Uniform Random Timer, Synchronizing Timer, etc. 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. This is used when we want each thread to wait for the same amount of time. As per JMeter Glossary: Throughput is calculated as requests/unit of time. can only pause the threads to limit the throughput (requests per minute) to the desired value. A s the name suggested, Uniform Random Timer is used to generate the random delay in a uniform manner. JMeter: Holding Session for a certain period of time. JMeter BeanShell Timer is a scripting-based timer. Constant Throughput Timer. Debug sampler throughput can go more than 100000/sec. Constant Throughput Timer – introduces variable pauses, calculated to keep the total throughput as close as possible to a given figure. 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. 2. Response Assertion. 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". I use JMeter for web testing. basically, drop the synchronising timer, use a constant throughput timer instead, configure wait times and then calculate the. Constant Throughput Timer The constant throughput timer is a special type of timer used to create pauses. This timer adds a delay between each request. JMeter Constant Throughput Timer Example. Ramp up 1 second for all. There is a Constant Throughput timer, which as far as I understand, is to control throughput for individual requests. throughput property as: ${__P(throughput,)} "tell". 3. As I keep on increasing the target throughput of JMeter at runtime, I noted that the actual achieved throughput value is limited by mainly 2 factors -. JMeter cannot send requests faster than your application is capable of responding. Set Target Throughput = 40. As you see, no other timers except Througput shaping 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. Because JMeter sometimes displays throughput in per minute and sometimes in per second, whereas the hits per second is always per second. 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. 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. It is not necessary to have a separate HTTP header manager with each request unless request needs a unique header. If Ramp-up Period is the time taken by JMeter to create the number of threads per iteration and if the duration of the test is 50820 seconds, then I should have 508200 samples only ( 50820/10 * 100 ). No other timer or plugin is added in the test plan. Below you will find a categorized list of the most common timer elements included with JMeter. Gaussian Random Timer A Gaussian Random Timer calculates the thread delay time. You can add this element to your test plan by following “Thread Group -> (right click) -> Add -> Timer -> Constant Throughput Timer” path. Apache JMeter is an open source Java based tool that enables you to perform functional, load, performance and regression tests on an application. Very silly mistake with a conclusion: Check your throughput value, test for longer periods. 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. 3. If your script keeps hitting timeouts and includes these elements, remove or disable them unless they are important for your functional test scenario. ), you can do this using i. 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. All controllers and samplers must be under a thread group. you will be able to send 50 requests per second, etc. 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. Placing the HTTP sampler under different threads is to send the API requests in parallel, because JMeter by default will run threads simultaneously when “Run Thread Groups consecutively” under the test plan is unchecked. 1. Constant Throughput Timer: acts precise enough on "minute" scale, if your test lasts less than minute it might not apply the throughput. I ended up using constant_throughput to control the number of requests per second. However I fail to see how Constant Throughput Timer is connected with the timeouts because it slows the number of. QAInsights. Constant Throughput Timer will be enough for your scenario. The Constant Throughput Timer will add random pauses between requests during test execution to match the required throughput figure (samples per minute). A Constant Throughput Timer will look like the picture above. Let's see a brief thought on this: To achieve the target throughput, you need to have enough. A JMeter Timer is a built-in plugin tool for JMeter that can help with spacing out your sample requests. Constant Timer with a Thread Delay of 5 milliseconds. Results Action Set Handler 4. I even tried giving 8 users, rampup-1sec, loopcount-infinite and duration-1hour, with constant throughput timer set to 480 req/sec but it ended up giving me total processed samples as 28700; Would be helpful if I could get any other approach where I could exactly process 26. Allocate the target throughput to required number (30 in this case). 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,. 4 Constant Throughput Timer This timer introduces variable pauses, calculated to keep the total throughput (in terms of samples per minute) as close as possible to a give figure. Constant Throughput Timer: This timer define the number of sampled need to be executed per. 8,610 13 13 gold badges 104 104 silver badges 233 233 bronze badges. This includes any intervals between. e. 6 requests per minute or 2. at org. As the name implies, the thread group element controls the number of. Try using Constant Throughput Timer. Follow. 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. variable variable. This plugin is specially designed to schedule RPS loads. JMeter Perfmon. Plus “Constant Delay Offset”. apache. So your approach with different Thread Groups is valid. If above information is not enough try to elaborate your query and include 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). 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. As per documentation: Set Target Throughput = 40. Adding extra node will add extra 200 TMP. I would say that these timers are mutually exclusive. ThroughputController. 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. Figure shows, Constant Throughput Timer for 60 requests per. 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. Now, add the Constant Throughput Timer. 3. Simply set the wait_time = constant_throughput (0. Constant Timer. 线程组线程数设为10. e. The performance bottleneck of target app. Step 3. If it is added under a sampler then the parent sampler will wait for the defined time. Throughput Shaping Timer per se can only pause JMeter threads to limit execution rate to the given number of requests per second. I have tried JMeter with a constant throughput timer with throughput = 1500000 per second and running 1000 threads. This video features Precise Throughput Timer in #JMeter. Component Properties - Properties that contain information about the duration and. You can see that Start time difference between 1st request and 41st request is 1 minute. 1. So overall 20 users - ramped up in 1 seconds. A user logs in, goes to the main page, searches for a product, sees. 4 requests per minute, it can be done using i. And then execute the test we see that the execution of each sampler is delayed by 2000 milliseconds. A constant throughput timer in JMeter is used to achieve the actual output by computing the total number of requests. 1. 1). Uniform Random Timer. Throughput Shaping Timer. 4. Throughout the Hold Load time(180sec) the requests will be looped. 0. correct use of throughput controller (JMeter) Main thread is set to 50 concurrent users (looping - as testduration will be scheduled). . Constant Timer. In the JMeter script, Constant Timer is used to add a constant delay before processing a sampler. 1 Answer. Results: The JMeter Timers available are as follows: BeanShell Timer. Gaussian Random Timer. คอร์สนี้จะพาทุกคนไปรู้จักกับ JMETER (Tool ที่ดีที่สุดสำหรับการทำ Performance Testing) ตั้งแต่เริ่มลงโปรแกรม ไปจนถึงการใช้งานชั้นสูง. July 1, 2023 by PerfMatrix. added a constant throughput timer to the ultimate thread group and gave the value as 480 requests per minute. If you need to execute 1000 requests in 60 minutes you need to run 16. 1) with Constant Throughput Timer value as 1200/min with "All active threads" and Timer added at the root of script. Throughput Timer allows you to set number of samples that thread can send per minute (e. Target throughput (in samples per. This video features #Constant #Throughput Timer in. Constant timer means the interval between each request is a fixed value. Uniform Random Timer The uniform random timer causes each thread to wait for a random time. And to manage throughput per minute you could use "Constant Throughput Timer". ramp up to 6000 samples per min and so on up to. If you want to run parallel requests - just increase the number of threads in the Thread Group to reach the desired concurrency. If you change the Constant Timer is zero, you will see the result is changed. Constant Throughput is a. I have used "jp@gc - Throughput Shaping Timer" But unable to achieve expected TPS. 0 requests/minute is saved as 0. Before understanding the semantics of throughput, let’s look at the concept. Just to recall in terms of Apache JMeter the meaning of Throughput is ‘requests per second’ or ‘samples per second’ send to the server by JMeter. Improve this question. If the request took 1000 mSec, it will apply 4500-1000 = 3500 mSec as the pacing. Despite word "constant" in its name, you can use i. Maybe I'm wrong here, but this should be samples per minute, so 200. Throughput timer is in root of test plan, Where as other timers are only applicable within scope of controllers. or Users - 2000. JMeter Constant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput. 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. JMeter. Constant throughput timer is used to control the execution of requests according to the specified throughput. This implies per minute 10 requests will be executed. thread numbers, target throughput and what kind of information needs. The test run may be shorter as if. This is known as Think Time and Jmeter provides different types of timers to help add the right amount of between samples: Constant Timer – will pause for the same amount of time. e. Constant Throughput Timer: Target - 60,000/min (60 secs) - all active threads, Threads (Users) - 200 with Ramp up - 1 sec, Duration: 1 hour. 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. Now, add the Constant Throughput Timer. Constant Throughput Timer. 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. 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. While running test simulations, it is sometimes necessary to be able to specify the throughput in terms of the number of requests per minute. With 100 threads you will get 50 requests per second. Skip to content Toggle navigation. Constant Throughput Timer allows us to keep total throughput constant. In addition, these timers are used for simulating the real user think time. asked Mar 4, 2021 at 6:07. The value can be changed in various ways: You could set the throughput using a property or variable. Constant Timer with a Thread Delay of 5 milliseconds. These sample results have various features like data size, elapsed time, etc. You cannot, JMeter waits for previous Sampler response prior to executing next Sampler so if you put all the Samplers under one Thread Group all the requests will be executed at the speed of the slowest request. If you want to limit JMeter's throughput to 1100 requests per minute consider using Constant. Example 1: you have submitted a request and it returns "pending" status. Throughput value in the Constant Throughput Timer can be changed to different values by using a variable or property. 7. Here is my script detail:->Simple Login request. 0. This includes any intervals between samples, as it is supposed to represent the load on the server. Though the name implies it is constant, various factors affect the behavior, such as server capacity, other timers or time-consuming elements in the test. 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. Such types of goals can be targeted by Throughput Timers. This will add Constant Timer at Thread Group level. All you need to do is to slow it down a little bit, one of the options is adding a Constant Throughput Timer. In JMeter, there are 9 different Timer types. according to your application design you can retry this. Ultimate Thread. JMeter has a group of elements, which are called “Timers”. Gaussian Random Timer. Select "Test Plan" node. 1 % of the load and 1 trying to generate. These timers will pause the threads and try to achieve the specified throughput value. 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. 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. so in your plan, you add. Constant Throughput Timer is only capable of pausing JMeter threads in order to limit the number of requests per second to the given value. 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. Precise Throughput Timer. Given you have 200 threads and 300 seconds ramp-up time it means that JMeter will start 200 threads in 300 seconds. Just to recall in terms of Apache JMeter the meaning of Throughput is ‘requests per second’ or ‘samples per second’ send to the server by JMeter. How to generate number of requests per second for one user. Except for /pdfbill (set to 50%), as we only want 25 concurrent users here instead of 50 users. host, port – jmeter’s host and port for the machine, where it is running. 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. 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. Download. If you're not able to reach the target throughput the reasons could be in: There are not enough threads in the Thread Group to conduct the desired 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. 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. To see the full JMeter Timer List, click on the Thread Group -> Add -> Timer. e. Test Plan 2. My website's expected performance is 200 concurrent users at 8 RPS. I ended up using constant_throughput to control the number of requests per second. Issue: If i run the test, I was expecting the min throughput of 15 requests/sec - upto 16 requests /sec. "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. I am developing a JMeter Script according to the below requirement. In JMeter, there are 9 different Timer types. Use Cases. 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. Uniform Random Timer 0. JMeter Throughput by Example. timer. You may need to try it out in a few runs to find the optimum value of sleep time to get the desired throughput. Constant Timer. 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. Use CTT in Test Plan level,not in thread group level. 0 elements: Constant Timer. Constant Throughput Timer is excellent to regulate the number of hits without changing the. This is "closed workload" approach, and it has major drawbacks (see here why). 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. I also had constant. The constant timer pauses the test execution for a constant period. g. To achieve this look at the Constant Throughput Timer. For example, this can be used to assign a distinct user id to be used by each thread. jmx: JMeter project file. When you need to add a delay based on an edge condition which is not covered by other timers i. 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. Ramp-up is the time for JMeter to kick off the virtual users from point 1. 0. Right click on "Test Plan" node. Below screenshot is list of all Timers provided by JMeter to control the load. 1 Answer. I use JMeter for web testing. log. 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. 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. Constant Throughput Timer : The Constant Throughput Timer is like the Precise Throughput Timer, except that it has fewer settings. See How to use JMeter's Throughput Constant Timer guide for more details. JMeter Constant Timer, Constant Throughput Timer. The constant timer is one of the most widely used timers in JMeter. JMeter Timers obey JMeter Scoping Rules so it's sufficient to add a single Timer and it will apply the desired throughput to all Samplers it its scope. Constant Timer) as a child of the 2nd request. I think the documentation was before Ultimate Thread Group was introduced. Throughput value in the Constant Throughput Timer can be changed to different values by using a variable. Sample Time of Sample 2 is 172 ms. 4. Timer’s Present in JMeter. 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. Doing the math, it should send a request every 5 milliseconds, and being 200 Threads, it should send 200 requests/second (200*5 = 1000ms). The Constant Throughput Timer has a setting that lets you share its timer across 'All Active Threads' so that you create a constant load on a server. Remember 2 things: Throughput Timer isn't able to create threads, it can only slow them down so make sure that. Precise Throughput Timer (PTT) # Como mencionamos previamente, el Precise Throughput Timer (PTT) y Constant Throughput Timer (CTT) tienen como propósito regular el arribo de hilos (Vusers). N. 6. 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. Ori Marko Ori Marko. 3. 2. Implementing Pacing with Groovy Scripting. Constant Delay Offset (in milliseconds): The number shows a constant delay which will be added in random number generated by Gaussian Function in the range of given deviation value. Precise Throughput Timer. Summary Report I have tried 2 ways: Instead of simple controller, i have used throughput controller and used percent Executions. Improve this question. Poisson. “Calculate throughput “ option can be varied based on the current thread, all threads in your test plan. In this case, we are using a JMeter plugin - Throughput Shaping timer. iii. Right click Thread Group > Add > Timer > Constant Timer. org. 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. This would allow you to adjust it via Command Line in real time, as the test script is being executed. new_throughput – new intensity value, op/min. I have used the constant throughput timer before, also as child of certain requests. Constant Throughput Timer will be enough for your scenario. 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. getMaxThroughputAsInt(ThroughputController. 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 achieved target may be slightly high. Also, JMeter tries to set the throughput per minute, so tests should be longer then 1 or 2 minutes with that timer. So in total you will have approximately 50 + 5 samplers, the actual amount will vary depending on your response time. 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. However, in one case I need an additional constant timer because I need to wait a certain time between two requests. org; The function of timers is to delay the requests. 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. is correct, but if you leave it as is JMeter will execute requests as fast as it can. If you need to test your system at 3500 requests per second you need to use slightly different approach, to wit add Constant Throughput Timer to your Test Plan and configure it to limit JMeter requests rate. ${__P(throughput)}. Timers provided in JMeter Constant Timer. control. Nested classes/interfaces inherited from interface org. 1. This class implements a constant throughput timer. Simply set the wait_time = constant_throughput (0. 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. All of the "Timer" group of elements affect the script. Constant Throughput Timer is only capable of pausing JMeter threads in order to slow them down to reach the target throughput. 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？. HTTP Sampler for GET call is used. You can see that Start time difference between 1st request and 41st request is 1 minute. In Gaussian and Poisson random timer, the random number generation is based on the pre-defined function, but in the. What are Samples in JMeter? It generates one or more sample results. By default each JMeter thread executes samplers as fast as it can. 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:. Add 1. Beanshell Server, check out How to Adjust the. The first request wil receive the correct amount of throuhput the first time, and so will the 2nd request. JMeter also provides a timer component, ‘Constant Throughput Timer’, which you can use to set the value of Transactions per. Share. The total number of requests JMeter will be able to make will mostly depend on application response time. 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。. Constant Throughput Timer will let you control the flow of. Open your JMeter script and right click on Thread Group. Total Http Requests - 24, Total Http Request/min - 12, Test Duration 2min, Waiting time between requests per minute : 60min/12req = 5sec . The easiest way of controlling the number of requests per second (throughput) in JMeter test is using Constant Throughput Timer. This plugin also works similarly to Constant Throughput Timer, which pauses the threads based on the target Throughput. 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. If you look at JMeter's Thread Group you will see Specify thread lifetime input:. 作用：让jmeter以指定数字的吞吐量进行压测. Lets. 1 Answer. Test Case 1: - 3 requests per minute - 1 request each 20 seconds. This plugin is specially designed to schedule RPS loads. Constant Timer. 0” your throughput during the test will be 1 request per minute. For example, a Bean shell timer is usually used to give delay time or think timer in between sampler requests. Bạn sẽ nhập 1 giá trị ngẫu nhiên vào Constant Timer thay vì giá trị cụ thể. can only pause the threads to limit the throughput (requests per minute) to the desired value. It is not even reaching 14 (well, except once)Irrespective of how much time the previous request took, it will apply the remaining time. I currently need to execute a test with apache Jmeter that makes 400 requests per second. " --- this is not entirely true. Make sure that all the Samplers are in the Constant. Jmeter: Constant throughput Timer with Ultimate Thread Group. Constant Throughput Timer. （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. Boundary value Extractor iv. Ramp-up is the time for JMeter to kick off the virtual users from point 1. 1 Thread Group. 2.