Constant Throughput Timer will let you control the flow of requests to be. So you will get 10 threads up and running only by 19th second. This includes any intervals between. JMeter also provides a timer component, ‘Constant Throughput Timer’, which you can use to set the value of Transactions per. Thread group elements are the beginning points of any test plan. So basically throughput is the number of requests which JMeter was able to within test duration time frame. 0 (inclusive) and 1. 1. So first of all try increasing the number of threads; Make sure to follow JMeter Best. e. What is throughput time in JMeter? Throughput is calculated as requests/unit of time. It seems that the Constant. e. You can consider switching to Concurrency Thread Group and Throughput Shaping Timer. Constant Throughput Timer cannot force threads to execute faster, it can only pause threads to limit JMeter's throughput to the defined value. Constant Throughput Timer The constant throughput timer is a special type of timer used to create pauses. JMeter sends specific types of requests to the server; with the help of samplers, the thread group decides which request is required to. It is not necessary to have a separate HTTP header manager with each request unless request needs a unique header. 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. Before understanding the semantics of throughput, let’s look at the concept. 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. 4. User variables can be referenced in any field of any JMeter Component. piotr. Two above would cover the majority of use cases, however if you want more control on your load pattern look into Throughput Shaping Timer (available through JMeter plugin) Share. 8K subscribers. 0. และเราสามารถใช้ Constant Throughput Timer ในการกำหนดจำนวน request ต่อนาทีที่เรา. 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. Throughput, essentially, is the. 6 requests per minute, in this case they will be evenly distributed. If you want to send 1 request each 20 seconds - the same approach as for point 2 but Target Throughput will. 6 transactions per minute. Petr. thread group (thread = 1000, ramp up = 100 sec, loop count = 1) loop controller( above 3 request with loop count = 12) constant throughput timer = 5. Constant Throughput Timer is excellent to regulate the number of hits without changing the. The timer tries to produce a constant. See Also: Serialized Form. org; The function of timers is to delay the requests. 线程组线程数设为10. This is used when we want each thread to wait for the same amount of time. Except for /pdfbill (set to 50%), as we only want 25 concurrent users here instead of 50 users. I'm currently using Apache JMeter to run load tests on the REST interfaces of my backend application. Share. The time unit is chosen so that the displayed rate is at least 1. Name Email Website. Debug sampler throughput can go more than 100000/sec. Poisson Random Timer. If you want to slow down JMeter to the desired number of requests per minute it can be done using Timers. Constant Throughput Timer. In Gaussian and Poisson random timer, the random number generation is based on the pre-defined function, but in the. 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. This capability is really helpful for debugging tests in real time. 2. How to add a Timer-Right Click on Thread Group -> Hover over Add -> Hover Over Timer -> Click on the required Timer. Use CTT in Test Plan level,not in thread group level. 10 000 requests in one hour is something like 166. I think the documentation was before Ultimate Thread Group was introduced. We will also briefly look into the usage of JMeter’s Throughput Constant Timer. If your goal is to mimic real users behavior as close as possible -. This ultimate thread group will give you more control over Threads. Share. 1 Answer. In case of throughput; the higher the better. Uniform Random Timer, Constant Throughput Timer, Synchronizing Timer, Beanshell timer,. คอร์สนี้จะพาทุกคนไปรู้จักกับ JMETER (Tool ที่ดีที่สุดสำหรับการทำ Performance Testing) ตั้งแต่เริ่มลงโปรแกรม ไปจนถึงการใช้งานชั้นสูง. 1 Answer. 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. Right click on Thread Group > Add > Timer > Constant Throughput Timer. 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. Also Constant Throughput Timer is only capable of slowing down JMeter to limit its. Another option is implementing pacing. variable variable. 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. can only pause the threads to limit the throughput (requests per minute) to the desired value. 1. 866 + 172 + 5000 = 22:05:07. In some cases, the Timer is used to implement the Pacing. Constant Throughput Timer will be enough for your scenario. 12. For ex. La principal diferencia entre estos dos temporizadores esta en que el CTT inserta un pausa constante mientras que el CTT inserta un pausa aleatoria. Now let us see in brief about some commonly used timers of Jmeter. So the scenario is the next: Attempt to log in with invalid params in a loop. Below screenshot is list of all Timers provided by JMeter to control the load. Despite word "constant" in its name, you can use i. You can add this element to your test plan by following “ Thread Group -> (right click) -> Add -> Timer -> Constant Throughput Timer ” path. And one of them has an obvious title – “Constant Throughput”. Each having its own constant throughput timer . Constant Throughput Timer is used for pausing the threads to slow down overall execution speed to reach the target throughput. 0 requests/minute is saved as 0. Closed asfimport opened this issue Apr 25, 2014 · 5 comments Closed Constant Throughput Timer: Java 8 incompatibility #3368. Add Flow Control Action sampler after the last requestJMeter provides HTTP header manager element to attach that additional information along with the request. 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. Step 2. I use JMeter for web testing. Or, in other words, how long it will take for JMeter to start execution of all the threads. We highly recommend using the Uniform Random Timer. JMeter Constant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput. You can use Constant Throughput Timer or Throughput Shaping Timer in order to limit JMeter's throughput to the given numbers and see whether it will be able to complete 10k requests in 1 hour or not. Adding a constant timer on a transaction. Poisson. Add Constant throughput timer to the thread group as shown below. In JMeter, the ramp-up period defines the time period within which all the specified users get in running state. Case 2: With sleep time (Using Constant Timer) In this case, throughput will be controlled by introducing sleep time in between threads. jmxaccording to jmeter manual ramp up is: How long JMeter should take to get all the threads started. JMeter: Not enought delay between HTTP samplers. it worked. JRS223 Timer. 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. Very silly mistake with a conclusion: Check your throughput value, test for longer periods. Constant Timer at Thread Group level. 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. The timer tries to produce a constant throughput till the end of the test to achieve the target. apache. Below timers are used to implement pacing in Jmeter to achieve the desired load/Business transactions. I currently need to execute a test with apache Jmeter that makes 400 requests per second. And one of them has an obvious title – “Constant Throughput”. By the way, there is an extended version of the CTT. No other timer or plugin is added in the test plan. Throughput - the Throughput is measured in requests per second/minute/hour. Move the Constant Throughput Timer under the request. according to your application design you can retry this. This plugin also works similarly to Constant Throughput Timer, which pauses the threads based on the target Throughput. I use JMeter for web testing. Component Properties - Properties that contain information about the duration and. Test Plan. 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. A user logs in, goes to the main page, searches for a product, sees. 0 Calculate Throughput based on: all active threads in current thread group So now, in 1 minute, JMeter will try to send 3000 requests and in 5 minutes, request count will be more or less around 15000. 1. Other elements, e. In. A s the name suggested, Uniform Random Timer is used to generate the random delay in a uniform manner. 039 ( As shown in the above figure) The delay of each sample is 5000 ms. Constant throughput timer not working properly. 0 (exclusive) Multiplied by “Random Delay Maximum”. iii. Mình tin là bạn cũng muốn có case này trong kiểm thử của mình. BSF Timer. Uniform Random Timer. Constant Throughput Timer – introduces variable pauses, calculated to keep the total throughput as close as possible to a given figure. For example, this can be used to assign a distinct user id to be used by each thread. Constant Timer. 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). Precise Throughput Timer. 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. 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. jmeter; performance-testing; Share. 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. jmeter. I am using a Constant Throughput Timer with "Calculate throughput based on: all active threads in current thread group" selected. JMeter Properties are global, can be accessed from different thread groups and persist all the time while JMeter is running. JMeter Perfmon. The tail of this log (most recent 200 rows) can be viewed live while the test is running. Tổng kết 2 Answers. Click Add –> Timer –> Constant Timer. Like this: Throughput Controller config: Based on is Percent Execution and Throughput is 20. Also Constant Throughput Timer works on minute level and your desired throughput should be. I want to measure the response time of this 100 users login which I've. Constant Timer. With 100 threads you will get 50 requests per second. 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. Constant Throughput Timer config: Target Throughput is 600. Recording scripts is where you will spend most of your time. 0. 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. jmeter. 3. Precise Throughput Timer is more "precise" but a little bit harder to use as you need to provide controlled throughput. Add 1. So you creating the excessive number of threads and then the timer will. Nested Class Summary. Here, we’ve added a Constant Timer with a Thread Delay of three seconds to our thread group. 1. The JMeter docs in 3. The test run may be shorter as if. This timer adds a delay between each request. Constant Throughput Timer allows us to keep total throughput constant. Simply set the wait_time = constant_throughput (0. Doing the math, it should send a request every 5 milliseconds, and being 200 Threads, it should send 200 requests/second (200*5 = 1000ms). JMeter Constant Timer, Constant Throughput Timer. Ultimate Thread. 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. 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. Constant Timer. 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. 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. For example: 1000 target threads with 1000 seconds ramp-up: JMeter will add one user each second18. It seems that all the configurations were correct, but the actual number of requests in the constant throughput timer was too low. Try running your test with 1 virtual user. A constant throughput timer in JMeter is used to achieve the actual output by computing the total number of requests. Request Oriented Goal: In such types of goals, we need to achieve the defined number of requests in an hour. Gaussian Random Timer. 4 requests per minute. You are right that Concurrency Thread Group is missing features of Stepping. You can use Constant Throughput Timer or Throughput Shaping Timer in order to limit JMeter's throughput to the given numbers and see whether it will be able to complete 10k requests in 1 hour or not. according to your application design you can retry this. 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. e. 5K users or somewhere around it. 0. The Uniform Random Timer pauses the thread by a factor of: The next pseudorandom uniformly-distributed value in range between 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. Constant Throughput Timer can only pause threads in order to limit JMeter's throughput to the defined value. This video features #Constant #Throughput Timer in #JMeter. Nested Class Summary. Constant Throughput Timer can only pause the threads to the desired throughput so if you want to achieve 10 requests per second with 20 users your application must be at most 500ms, if it will be higher - the number of requests per unit of time will be proportionally less. 1 Answer. org; The function of timers is to delay the requests. Constant Timer or Gaussian Random Timer or Uniform Random Timer or whatever. 2. 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. Constant Throughput Timer will let you control the flow of. Set Target Throughput = 40. I think it will be more accurate than looking at locust's current_rps tracker, especially at low load. Constant Timer adds a delay after the request completes (not after start), which doesn't fit either. e. Here are the workarounds: Calculate the number of threads you need to achieve your target. e. I have used the constant throughput timer before, also as child of certain requests. This is what we need to control request frequency. Por ejemplo, cuando necesitamos mantener el servidor bajo cierta presión durante mucho tiempo, podemos controlar el rendimiento a través de este temporizador. 1) with Constant Throughput Timer value as 1200/min with "All active threads" and Timer added at the root of script. Follow asked Oct 26, 2019 at 10:10. Different Timer Types. thread numbers, target throughput and what kind of information needs. N. Timers provided in JMeter Constant Timer. How to calculate. 4. 2. Precise Throughput Timer. Throughout the Hold Load time(180sec) the requests will be looped. The following article provides an outline for JMeter Throughput. Created attachment timer. In the JMeter script, Constant Timer is used to add a constant delay before processing a sampler. The time is calculated from the start of the first sample to the end of the last sample. 1) with Constant Throughput Timer value as 1200/min with "All active threads" and Timer added at the root of script. The Constant Throughput Timer will add random pauses between requests during test execution to match the required throughput figure (samples per minute). Results Action Set Handler 4. 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. As per documentation>. 4K views 2 years ago Learn Apache JMeter Series. JMeter Property via __P() function as "Target Throughput" value. These sample results have various features like data size, elapsed time, etc. this is how you can control for how long JMeter threads are allowed to run. In this case, we are using a JMeter plugin - Throughput Shaping timer. JMeter Constant Throughput Timer. 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. It is not even reaching 14 (well, except once)Irrespective of how much time the previous request took, it will apply the remaining time. 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. Here is my script detail:->Simple Login request. jmeter_loc – the full path to the root jmeter folder. Use Throughput Shaping Timer. e. Timer’s Present in JMeter. First of all try increasing the number of threads. Improve this answer. Constant Throughput Timer can only pause the threads in order to limit JMeter to the defined number of requests per minute. Concurrency depends on your test plan and application response time. Concurrent users are a different way of looking at application traffic. 1. And if you changed load generator machine or server. 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. 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". A Constant Throughput Timer paces the samplers under its influence so that the total number of samples per unit of time approaches a given constant as much as possible. 30. To apply a timer to a single sampler, add the timer as a child element of the sampler. If the request took 1000 mSec, it will apply 4500-1000 = 3500 mSec as the pacing. JMeter provides lots of ways to record the value of throughput. Constant Throughput Timer; JSR223 Timer #20. A constant throughput timer in JMeter is used to achieve the actual output by computing the total number of requests. Both thread groups are sending particular REST requests at a certain throughput using a constant throughput timer. Example 1: you have submitted a request and it returns "pending" status. Let’s think about an end-to-end scenario for an e-commerce website. Solution 1: You can use Stepping Thread Group (allows to set thread number increase stages over set periods of time) with Constant Throughput Timer in it. 1 % of the load and 1 trying to generate. With 100 threads you will get 50 requests per second. And if you changed load generator machine or server. Instead of focusing on trying to hit the same request at the same time, which is fiddly in JMeter, you should setup your test to be a realistic representation of the sort of load you want your application to support. JMeter understand Thread Group / Throughput and INCLUDE. The test plan currently uses two thread groups and runs those in loops. Second, it works precise enough on "minute" level. For further detail check JMeter blog about Constant Throughput Timer. log can be very useful for troubleshooting JMeter-specific issues. Select it and you. 3. Given you have Loop Count set to 1 JMeter will shut down. JMeter now supports. This timer tries to maintain a constant throughput throughout the test and achieve the target. Constant Throughput Timer is available out of the box with JMeter. Right click on "Test Plan" node. The full jmeter. The JMeter Timers available are as follows: BeanShell Timer. However it is precise enough only on "minute" level so you might need to play with ramp-up period. This plugin is specially designed to schedule RPS loads. If the machine stamps sixty widgets in one minute, it’s throughput is one widget per second. 2. e. Lets. Hot Network Questions Is there any way retirement systems can cope with declining population? Which verb fits in 庭に木をもう一本_？. JMeter provides lots of ways to record the value of throughput. Constant Throughput 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. I have tried JMeter with a constant throughput timer with throughput = 1500000 per second and running 1000 threads. 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. Save my name, email, and website in this browser for the next. 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。. See How to use JMeter's Throughput Constant Timer for details. Throughput Shaping Timer Properties. When I specify 50 threads on the Thread Group and a throughput of 1 sample per minute, I see 50 samples go through immediately and then 1 sample per minute after that. Constant Timer at Thread Group level. Thanks @Dmitri. 1 Answer. Constant Throughput Timer: acts precise enough on "minute" scale, if your test lasts less than minute it might not apply the throughput. A good position would be a direct child of the Thread Group. JMeterは一般的にWebシステムに一定のアクセス負荷をかける試験ツールです。 通常機能ではアクセス負荷量の上げ下げが困難ですが、外部ライブラリ(Throughput Shaping Timer)を組み込むことでグラフィカルかつ簡単に実現できたので紹. 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. 2. These timers will pause the threads and try to achieve the specified throughput value. If above information is not enough try to elaborate your query and include i. 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. Based on RPS you want you can either set the value low for less number of requests and more for more RPS. Initial delay=0 Startup Time=250 Hold Load= 400 seconds Shutdown time= 250. The main factor is your application response time, if it will be 1 second - go for 400 threads for 1 request, if it is 2 seconds - you will need 800 threads for 1 request, etc. Simple Controller i. I have used "Constant Through Timer" to control the flow of transactions. Given you use Concurrency Thread Group it makes more sense to switch to Throughput Shaping Timer which can be connected to the Concurrency Thread Group. Khi đó bạn sẽ cần sự trợ giúp từ hàm _Ramdom của JMeter. e. Throughput Shaping Timer. Now, add the Constant Throughput Timer. There are two different ways of pacing the requests: - delay each thread according to when it last ran - delay each thread. Constant Throughput Timer is only capable of pausing JMeter threads in order to slow them down to reach the target throughput. 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. Given your setup the only way of having exactly 399600 samplers is using Throughput Controller in. Remember - if the application itself is not supporting the desired throughput, jmeter can not help here. JSR223 Timer. I used 80 threads and set a Constant Throughput Timer and Variable throughput timer and i set 10 transactions per second and i when i get Jmeter logs i see max 4 transactions per second . You can see that Start time difference between 1st request and 41st request is 1 minute. Use CTT in Test Plan level,not in thread group level. You can also use a JMeter Function or Variable in the “Thread Delay” input. control. BSF Timer. Let’s think about an end-to-end scenario for an e-commerce website. Plus “Constant Delay Offset”. Constant Throughput Timer introduces variable pauses, calculated to keep the total throughput (in terms of samples per. Testing without a JMeter timer can create irregular test results because the simulated requests will come in a different pattern than. 3. 4 Timers do not define the start and end of each timer: . JMeter™ User Save time for the Thread Groups creation. The first thread group randomly picks one of several. JMeter User Defined Variable for enabling Test Duration. Jmeter: Constant throughput Timer with Ultimate Thread Group. Using a uniform random timer allows you to pause the test execution for a random time, where you can. 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. 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. Each JMeter thread executes samplers as fast as it can, however next iteration won't start until previous is finished so given you use 1 thread - the throughput won't be higher than application. 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. (2) Throughput Controllers to distribute the load in Percent [20% and 80% of total 24. 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. Apache JMeter is an open source Java based tool that enables you to perform functional, load, performance and regression tests on an application. Timer in JMeter is easy but crucial part of JMeter where we have to manage the thread user count and time to apply the load to the application. Timers provided in JMeter Constant Timer. By the way, there is an extended. Constant Timer) as a child of the 2nd request. Ramp up 1 second for all. jmeter; Share. Open your JMeter script and right click on Thread Group. TestElement. Hot Network QuestionsYou can slow down JMeter's number of requests per minute by using Constant Throughput Timer. JMeter Constant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput (Total Number of Requests). It pauses the execution of test for a specified. Given here are some JMeter listeners that you can use for this purpose: Summary Report Aggregate Report Aggregate Graph Graph Results. e. Throughput Shaping Timer. 7 requests per second. Add a relevant JMeter Timer (i. 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. e. Do not include multiple CTT in your test script as it will lead to a hoax. This timer tries to maintain a constant throughput throughout the test and achieve the target. Constant Timer. If you set its value as “1. First of all, Constant Throughput Timer can only pause JMeter threads in order to limit JMeter's throughput to the desired value. X * Random Delay Maximum + Constant Delay Offset| where X an be the. Constant Throughput is a. JMeter: Holding Session for a certain period of time. Precise Throughput Timer. This class implements a constant throughput timer. 8、吞吐量定时器（constant throughput timer）需要补充注意事项，有不理解的地方. Maybe I'm wrong here, but this should be samples per minute, so 200.