I am developing a JMeter Script according to the below requirement. e. By the way, there is an extended. i can see response times over 40 seconds. This is "closed workload" approach, and it has major drawbacks (see here why). 1. Now let us see in brief about some commonly used timers of Jmeter. apache. 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. Poisson. Gaussian Random Timer A Gaussian Random Timer calculates the thread delay time. The easiest way of controlling the number of requests per second (throughput) in JMeter test is using Constant Throughput Timer. 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. TestElement. What is throughput time in JMeter? Throughput is calculated as requests/unit of time. By the way, there is an extended version of the CTT. Test Case 1: - 3 requests per minute - 1 request each 20 seconds. With Constant Throughput Timer you can only pause JMeter throughput (number of requests per minute) to the desired rate but it works precisely enough on minute level, if you need second-level. I currently need to execute a test with apache Jmeter that makes 400 requests per second. 4K views 2 years ago Learn Apache JMeter Series. 1. HTTP Sampler for GET call is used. A JMeter Timer is a built-in plugin tool for JMeter that can help with spacing out your sample requests. The time is calculated from the start of the first sample to the end of the last sample. jmeter. Click Add –> Timer –> Constant Timer. Beanshell Server, check out How to Adjust the. The threads in my thread group. getMaxThroughputAsInt(ThroughputController. Nested classes/interfaces inherited from interface org. Throughput Controller - You can set the Max number of executions, OR the Percentage of executions of the sample (i. La principal diferencia entre estos dos temporizadores esta en que el CTT inserta un pausa constante mientras que el CTT. 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. BSF Timer. 1000 and slowing the requests down using Constant Throughput TimerI've set up a jmeter distributed testing setup with one master and multiple slaves. I have constant throughput timer which will hit 1 request in 3 minutes in my test plan due to this my requests are getting timeout as it is delaying requests to 1 hour. Constant Throughput Timer – to specify exact load to generate, i. Below screenshot is list of all Timers provided by JMeter to control the load. bsh_loc – folder, containing bsh-files. "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. 3. If we were to add a Constant Timer to the test and set the delay to be 2000 milliseconds. 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 would say that these timers are mutually exclusive. Allocate the target throughput to required number (30 in this case). 2. JMeter Constant Timer, Constant Throughput Timer. 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. So first of all try increasing the number of threads; Make sure to follow JMeter Best. 1. 1. log: Much of the content of the jmeter. Add Constant Timer as a child of the first request and configure it to introduce "sleep" for 30 minutes: in this case the delay will be introduced before first request, see A Comprehensive Guide to Using JMeter Timers article for more information. It is often the first step to develop test plans for applications. Target Throughput behavior of Constant Throughput Timer in JMeter. Thread Group 3. Constant Throughput Timer pauses active threads to reach throughput level you define. คอร์สนี้จะพาทุกคนไปรู้จักกับ JMETER (Tool ที่ดีที่สุดสำหรับการทำ Performance Testing) ตั้งแต่เริ่มลงโปรแกรม ไปจนถึงการใช้งานชั้นสูง. 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. JMeter Constant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput. All of the "Timer" group of elements affect the script. We will perform the load test on the JCG home page (Constant Throughput Timer is only capable of pausing JMeter threads in order to slow them down to reach the target throughput. 5. The Constant Throughput Timer is again a more powerful Timer, not in the same way the previous. Throughput Shaping Timer is a plugin and you need to install the plugin. Another option is implementing pacing. To achieve this I have configured a Constant Throughput Timer to 12000 requests per minute (active for. Do not include multiple CTT in your test script as it will lead to a hoax. 4. Follow answered Oct 22, 2015 at 16:42. Throughput shaping timer or CTT to control the expected throughput. It can be defined in terms of a variable or function call, and the value can be changed during a test. e. This video features #Constant #Throughput Timer in #JMeter. Now check the time difference between the 1st sample and 11th sample, it is 1 minute. JMeter BeanShell Timer is a scripting-based timer. Its called JMeter Throughput Constant Timer. In particular the most commonly used elemends are: Synchronizing Timer – to pause threads unless certain number will be reached and fire them all at the same time. Concurrent users are a different way of looking at application traffic. All you need to do is to slow it down a little bit, one of the options is adding a Constant Throughput Timer. Despite word "constant" in its name, you can use i. 039 ( As shown in the above figure) The delay of each sample is 5000 ms. according to your application design you can retry this. 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. 1 Thread Group. 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. Use CTT in Test Plan level,not in thread group level. Hướng dẫn sử dụng Timer trong JMeter – Add Precise Throughput Timer 2. Constant Throughput Timer config: Target Throughput is 600. Constant Throughput Timer is used for pausing the threads to slow down overall execution speed to reach the target throughput. Moreover, it's more or less precise only on "minute" level, if your test lasts less - you may not see the impact. Open your JMeter script and right click on Thread Group. Now let us see in brief about some commonly used timers of Jmeter. e. In case you have only 1 request as in your scenario then it will generate Throughput of 20 request/sec (sometimes 20. 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:. In JMeter, the ramp-up period defines the time period within which all the specified users get in running state. If current number of threads is not enough in order to. You can add this element to your test plan by following “Thread Group -> (right click) -> Add -> Timer -> Constant Throughput Timer” path. Step 3. Component Properties - Properties that contain information about the duration and current state of the test. 1. 8,610 13 13 gold badges 104 104 silver badges 233 233 bronze badges. I have used "Constant Through Timer" to control the flow of transactions. See How to use JMeter's Throughput Constant Timer guide for more details. 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. First of all, Constant Throughput Timer can only pause JMeter threads in order to limit JMeter's throughput to the desired value. 0. 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,. And then execute the test we see that the execution of each sampler is delayed by 2000 milliseconds. Example configuration: Add Constant Throughput Timer as a child of the Login sampler. As you see, no other timers except Througput shaping timer. 3. Try running your test with 1 virtual user. 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. We should see. Add 1. If you set its value as “1. org. You can consider switching to Concurrency Thread Group and Throughput Shaping Timer. You can consider switching to Concurrency Thread Group and Throughput Shaping Timer. Other timers may impact constant throughput timer target, so it is recommended not to use other timers. And I set Loop Count: forever. Download. JMeter understand Thread Group / Throughput and INCLUDE. The first request wil receive the correct amount of throuhput the first time, and so will the 2nd request. One widget at a time is passed through a machine that stamps it with a label. Constant Timer: This is one of the most popularly used timer in JMeter. This includes any intervals between samples, as it is supposed to represent the load on the server. Uniform Random Timer. The JMeter Timers available are as follows: BeanShell Timer. Very silly mistake with a conclusion: Check your throughput value, test for longer periods. And if you changed load generator machine or server. Ramp-up is the time for JMeter to kick off the virtual users from point 1. BSF Timer. Jmeter: Constant throughput Timer with Ultimate Thread Group. Constant Throughput Timer. JSR223 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. 6 transactions per minute. If you need to use the same common steps in several Thread Groups. 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. jmeter. Here are the workarounds: Calculate the number of threads you need to achieve your. Constant Timer; Gaussian Random Timer; Uniform Random Timer; Constant Throughput Timer; Synchronizing Timer; JSR223. This blog post answers this questions and helps you build a JMeter test, step by step, to try it out. Timer: By default, a JMeter thread executes samplers in sequence without pausing. tgz (or whatever version you downloaded) Change into the unzipped directory: $ cd apache-jmeter-5. 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. 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. In addition, these timers are used for simulating the real user think time. I am developing a JMeter Script according to the below requirement. 目标吞吐量（target throughput)单位是每分钟发送的请求数. 0. You can add this element to your test plan by following “ Thread Group -> (right click) -> Add -> Timer -> Constant Throughput Timer ” path. apache. First of all try increasing the number of threads. Click Add –> Timer –> Constant Timer. 1 Answer. Use Precise Throughput Timer. My purpose is to to use Throughput Shaping Timer via JMeter API in my code programmatically. With 100 threads you will get 50 requests per second. 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. Add Flow Control Action sampler after the last requestJMeter provides HTTP header manager element to attach that additional information along with the request. This implies per minute 10 requests will be executed. Constant Throughput Timer (bộ hẹn giờ thông lượng không đổi) được sử dụng như một yếu tố định hướng mục tiêu giúp đạt được thông lượng mong muốn (tổng số yêu cầu). Precise Throughput Timer is more "precise" but a little bit harder to use as you need to provide controlled throughput. 1. The constant throughput timer delays the request to ensure that JMeter does not perform more requests than specified. 可以使用常数吞吐量定时器 (Constant Throughput Timer)来实现。. This timer generates Poisson arrivals with constant throughput. TestElement. Test Case 2: - 6 requests per minute - 1 request each 10 seconds. I also changed the heap variable to this and i have a virtual machine with 32. 1. 7 requests per second. I think the documentation was before Ultimate Thread Group was introduced. Uniform Random Timer 0. JMeter. 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. Here, we’ve added a Constant Timer with a Thread Delay of three seconds to our thread group. 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. 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. How to calculate. 3. 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. variable variable. 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. Constant Throughput Timer is available out of the box with JMeter. 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. 0. This timer tries to maintain a constant throughput throughout the test and achieve the target. So you need to supply the sufficient amount of threads in the Thread Group. Sorted by: 0. 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. Use Cases. So the real throughput depends on 2. Results: The JMeter Timers available are as follows: BeanShell Timer. If you want to limit your test. Remember 2 things: Throughput Timer isn't able to create threads, it can only slow them down so make sure that. either execute this 100 times OR. GitHub Repo: that the most simplest ways to control throughput in your tests is using either standard "out-of-box" Constant Throughput Timer or custom Throughput Shaping Timer from jmeter-plugins collection. The constant timer is the basic timer among all the given ones. If you look at JMeter's Thread Group you will see Specify thread lifetime input:. log is actually included in the bzt. If you choose to add more than one timer to a Thread Group, JMeter takes the sum of the timers and pauses for that amount of time before executing the samplers to. Add Constant Throughput Timer to your Test plan and configure it to send 30000 requests per minute (500 requests per second) Make sure that all the Samplers are in the Constant Throughput Timer's scope and you have. Constant Timer. The test plan currently uses two thread groups and runs those in loops. However I fail to see how Constant Throughput Timer is connected with the timeouts because it slows the number of. And one of them has an obvious title – “Constant Throughput”. JMeter has a group of elements, which are called “Timers”. In JMeter, the ‘Timer’ element simulates the real user behaviour of taking a pause on a webpage. Lets consider below load scenario for example: Total no of users = 5. Throughput Shaping Timer. Gaussian Random Timer. Command-line: you can pass this property value via -J command-line argument like: in JMeter define i. if you set it to 1, the thread will only send one request per minute). 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. User variables can be referenced in any field of any JMeter Component. Constant Timer. This plugin is specially designed to schedule RPS loads. 6. Alternative options are:JMeter also provides a useful timer component to configure or set a constant throughput value to test the application load. jmx: JMeter project file. The time is calculated from the start of the first sample to the end of the last sample. Given your setup the only way of having exactly 399600 samplers is using Throughput Controller in. Target throughput (in minutes): 3000. 1 Answer. 可以使用常数 吞吐量定时器 ( Constant Throughput Timer )来实现。. Constant Throughput Timer. Sorted by: 0. Adding extra node will add extra 200 TMP. 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. On top of that, it tries to maintain the exact amount of arrivals for a given timeframe ( throughputPeriod ). These timers will pause the threads and try to achieve the specified throughput value. Lets. 5. 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. 0. First of all, Constant Throughput Timer can only pause JMeter threads in order to limit JMeter's throughput to the desired value. Constant Timer with a Thread Delay of 5 milliseconds. It means that you have to implement the thread delay logic by yourself using one of the supported scripting languages. 0. The Apache JMeter site actually puts the workings of the ramp-up period best:. 1. JMeter Property via __P() function as "Target Throughput" value. The performance bottleneck of target app. Constant timer means the interval between each request is a fixed value. Constant Timer with a Thread Delay of 5 milliseconds. JMeter has a group of elements, which are called “Timers”. You are right that Concurrency Thread Group is missing features of Stepping. jmeter里面不可以直接控制吞吐量，但是我们可以通过操作并发数变相改变吞吐量。. This is "closed workload" approach, and it has major drawbacks (see here why). 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. 30. The JMeter Timers available are as follows: BeanShell Timer. The constant timer is one of the most widely used timers in JMeter. 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. In order to be able to send 400 RPS with 400 threads your application must respond in 1 second or less because JMeter waits for the response from previous sampler before starting the next one. Maybe I'm wrong here, but this should be samples per minute, so 200. Test Plan 2. 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. Step 3. If you get response times comparable to what you see in Fiddler. So first of all try increasing the number of threads; Make sure to follow JMeter Best. 4. Uniform Random Timer. Throughput is calculated as requests/unit of time. Constant Throughput Timer The constant throughput timer is a special type of timer used to create pauses. host, port – jmeter’s host and port for the machine, where it is running. There are 3 options to configure weighted load and highlight options provided by JMeter. I ended up using a Test Action with 30s pause. log. Simply set the wait_time = constant_throughput (0. Constant Throughput Timer – introduces variable pauses, calculated to keep the total throughput as close as possible to a given figure. Throughput Shaping Timer. Of course, if the server is not able to handle such a load,. 10 000 requests in one hour is something like 166. What are Samples in JMeter? It generates one or more sample results. g. Select it and you. In case of throughput; the higher the better. Improve this question. I want to run this test for five or ten minutes. 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. Some commonly used JMeter Timers are: Constant Timer; Uniform Random Timer; Precise Throughput Timer; Constant Throughput Timer; Gaussian Random Timer; JSR223 Timer; Poisson Random. ), you can do this using i. Adding a constant timer on a transaction. ramp up to 6000 samples per min and so on up to. JMeter: Holding Session for a certain period of time. Constant Throughput Timer can only pause the threads in order to limit JMeter to the defined number of requests per minute. 作用：让jmeter以指定数字的吞吐量进行压测. Improve this answer. Of course the throughput will be lower if the server is not capable of handling it, or if other timers or time-consuming test elements prevent it. Test execution result will looks like below for constant throughput timer jmeter example. Constant Throughput Timer acts precise enough on minute level so expect your number of requests applied from 2nd minute and onwards. Remember - if the application itself is not supporting the desired throughput, jmeter can not help here. Ori Marko Ori Marko. 7. JMeter provides lots of ways to record the value of throughput. You can try setting the number of threads to i. To add a timer element, we need to right-click on the Thread Group element and select Add, Timer, Constant Timer. Share. 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. The achieved target may be slightly high. Since: 4. Make sure that all the Samplers are in the Constant. nathan88wise (): When I specify 0 for the "Target throughput (in sample per minute)" of a Constant Throughput Timer, use either shared algorithm - "all active threads (shared)" or "all active threads in current thread group (shared)" and have a Thread Lifetime specified - the Thread Group will run with <"Number of Threads" - 1> threads. Because 100 transactions per hour means one transaction each 36 seconds for 1 user and if you have 30 users the number will be proportionally less. Response Assertion. e. 4. 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 ). Right click on "Test Plan" node. There is a Constant Throughput timer, which as far as I understand, is to control throughput for individual requests. The value can be changed in various ways: You could set the throughput using a property or variable. This plugin is specially designed to schedule RPS loads. To achieve this look at the Constant Throughput Timer. For further detail check JMeter blog about Constant Throughput Timer. Also be. Jmeter measures throughput by observing the. 12. 1. Save my name, email, and website in this browser for the next. 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. testelement. Inside each thread group I have one parent Transaction Controller and a Constant Throughput Timer, trying to keep the total generated load of the Thread Group at 2 Transactions per second; Underneath the transaction controller, I have 2 child Throughput Controllers: 1 trying to generate 8. I'm currently using Apache JMeter to run load tests on the REST interfaces of my backend application. Its called JMeter Throughput Constant Timer. 1). 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. JMeter Constant Throughput Timer Example. 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 - 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. In some cases, the Timer is used to implement the Pacing. 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. 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 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). 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. e. How to Use “ Constant Throughput Timer ” in JMeter. 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. As per JMeter Glossary: Throughput is calculated as requests/unit of time. 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. The first thread group randomly picks one of several. Download. Components presented here provide the functionality to introduce User Think Time in various forms among samplers. Move the Constant Throughput Timer under the request. 2. Closed asfimport opened this issue Apr 25, 2014 · 5 comments Closed Constant Throughput Timer: Java 8 incompatibility #3368. This class implements a constant throughput timer. Ramp up 1 second for all. As the name implies, the thread group element controls the number of. apache. For each thread, the variable will be assigned one of the values from the series in sequence. Constant Throughput Timer is excellent to regulate the number of hits without changing the. JMeter Perfmon. Bạn sẽ nhập 1 giá trị ngẫu nhiên vào Constant Timer thay vì giá trị cụ thể. Based on RPS you want you can either set the value low for less number of requests and more for more RPS. 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. e. Mình tin là bạn cũng muốn có case này trong kiểm thử của mình. JMeter provides lots of ways to record the value of throughput. The timer tries to produce a constant. 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 provides a variety of Timers and each of them allows introducing delays between requests mainly to simulate real user "think time" 75 requests in 2 minutes is approx 37 requests per minute and if you need to make it 15x times slower you need to execute ~2. Follow asked Nov 1, 2022 at 13:41. In both the cases structure of the test will be like the following:Be aware that Constant Throughput Timer is accurate enough on minute level so it can start pausing the threads only after 1 minute. 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. 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. JSR223 Timer. First of all ensure that you're following JMeter Best Practices as it might be the case JMeter configuration is not suitable for kicking off that many threads. 0 (inclusive) and 1. Right click on Thread Group > Add > Timer > Constant Throughput Timer. The formula is: Throughput = (number of requests) / (total time). BeanShell Timer. If there are more threads than values, the values get re-used. As a result, it provides a different terminology to understand the application’s. 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. So you creating the excessive number of threads and then the timer will. Có rất nhiều timers được cung cấp trong JMeter: Constant Timer, Gaussian Random Timer, Uniform Random Timer, Synchronizing Timer, etc. JMeter sends specific types of requests to the server; with the help of samplers, the thread group decides which request is required to. some examples are Constant Timer, Constant Throughput Timer.