For different time of the day I'd use a different throughput value. 3. 5K users or somewhere around it. 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. This plugin also works similarly to Constant Throughput Timer, which pauses the threads based on the target Throughput. e. Make sure that all the Samplers are in the Constant. 2. I am developing a JMeter Script according to the below requirement. Precise Throughput Timer → this timer will vary its delay interval to keep requests at or below a certain threshold. Constant Throughput Timer: This 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. Típicamente, para modificar la carga en una prueba se suele variar la cantidad de UVs (Usuarios Virtuales). testelement. All you need to do is to slow it down a little bit, one of the options is adding a Constant Throughput Timer. B. 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. 作用：让jmeter以指定数字的吞吐量进行压测. Constant Timer. Both thread groups are sending particular REST requests at a certain throughput using a constant throughput timer. Constant Throughput Timer. A Constant Throughput Timer will look like the picture above. And then execute the test we see that the execution of each sampler is delayed by 2000 milliseconds. testelement. added a constant throughput timer to the ultimate thread group and gave the value as 480 requests per minute. This timer adds a delay between each request. 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. So you need to supply the sufficient amount of threads in the Thread Group. Gaussian Random Timer. In case of throughput; the higher the better. Constant Throughput Timer: This timer define the number of sampled need to be executed per. Introduction. 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. 线程组线程数设为10. Given you have 200 threads and 300 seconds ramp-up time it means that JMeter will start 200 threads in 300 seconds. Constant Throughput Timer : The Constant Throughput Timer is like the Precise Throughput Timer, except that it has fewer settings. This time you will be able to correlate increasing load with other metrics like response time, throughput, number of errors, etc. e. BeanShell Timer. Throughput Shaping 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. 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. Component Properties - Properties that contain information about the duration and current state of the test. Constant Timer. JMeter acts as follows: It starts all threads within specified ramp-up period. It pauses the execution of test for a specified. 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. Debug sampler throughput can go more than 100000/sec. 1. 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. 1 Answer. This timer generates Poisson arrivals with constant throughput. 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. Constant Throughput Timer: Target - 60,000/min (60 secs) - all active threads, Threads (Users) - 200 with Ramp up - 1 sec, Duration: 1 hour. 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. Here are the workarounds: Calculate the number of threads you need to achieve your. 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. Constant Timer or Gaussian Random Timer or Uniform Random Timer or whatever. 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. 30. you will be able to send 50 requests per second, etc. Throughput Shaping Timer. {"payload":{"allShortcutsEnabled":false,"fileTree":{"src/components/src/main/java/org/apache/jmeter/timers":{"items":[{"name":"gui","path":"src/components/src/main. Ori Marko. QAInsights. Throughput - the Throughput is measured in requests per second/minute/hour. 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. 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. e. 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. Constant Timer. If you set its value as “1. 0. 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. 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. To add a timer element, we need to right-click on the Thread Group element and select Add, Timer, Constant Timer. Constant Throughput is a. Share. The achieved target may be slightly high. Constant Throughput Timer : The Constant Throughput Timer is like the Precise Throughput Timer, except that it has fewer settings. That means 40 samples has been executed in 1 minute. On top of that, it tries to maintain the exact amount of arrivals for a given timeframe ( throughputPeriod ). In Validate Thread group I have accessed property by function ${__P(some-property-name,)}, included a constant throughput timer with values of 73/min and have also set a throughput controller with. You could make the target throughput a variable too. 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. JMeter Throughput Timer Element Working. Constant Throughput Timer. In the JMeter script, Constant Timer is used to add a constant delay before processing a sampler. Its called JMeter Throughput Constant Timer. How to create JMeter test with parallel execution in one thread group with specific throughput? 0. I have a requirement that in ultimate thread group , constant throughput value needs to be changed for every 5 mins using beanshell pre-processor. 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. รวมถึง. g. Follow edited Mar 4, 2021 at 7:35. This video features #Constant #Throughput Timer in #JMeter. Ramp-up is the time for JMeter to kick off the virtual users from point 1. Precise Throughput Timer is more "precise" but a little bit harder to use as you need to provide controlled throughput. Component Properties - Properties that contain information about the duration and. This plugin also works similarly to Constant Throughput Timer, which pauses the threads based on the target Throughput. How to add "HTTP Cache Manager" element? You can follow the below steps: 1. Nested Class Summary. The value can be changed in various ways: You could set the throughput using a property or variable. This is what we need to control request frequency. คอร์สนี้จะพาทุกคนไปรู้จักกับ JMETER (Tool ที่ดีที่สุดสำหรับการทำ Performance Testing) ตั้งแต่เริ่มลงโปรแกรม ไปจนถึงการใช้งานชั้นสูง. Constant Throughput Timer. 6 requests per minute or 2. Example configuration: Add Constant Throughput Timer as a child of the Login sampler. Constant Timer. Changing this consistent worth during the test is additionally. Constant Timer at Thread Group level. These timers will pause the threads and try to achieve the specified throughput value. This is what we need to control request frequency. You can add this element to your test plan by following “Thread Group -> (right click) -> Add -> Timer -> Constant Throughput Timer” path. 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 Uniform Random Timer pauses the thread by a factor of: The next pseudorandom uniformly-distributed value in range between 0. Constant Throughput Timer will let you control the flow of. Ultimate Thread. I think that you're misusing Constant Throughput Timer. apache. jmeter. Step 2. Constant Throughput Timer is excellent to regulate the number of hits without changing the. Uniform Random Timer, Constant Throughput Timer, Synchronizing Timer, Beanshell timer,. Some commonly used JMeter Timers are: Constant Timer; Uniform Random Timer; Precise Throughput Timer; Constant Throughput Timer; Gaussian Random Timer; JSR223 Timer; Poisson Random. Constant Throughput Timer treats samplers individually therefore you need to multiply the throughput for the transaction by the number of its children samplers, i. The problem: lets say the first request needs a throughput of 60RPM and the second 30 RPM. Plus “Constant Delay Offset”. Share. 1) with Constant Throughput Timer value as 1200/min with "All active threads" and Timer added at the root of script. 3. 1 % of the load and 1 trying to generate. 66 to the "Target Throughput" input (100 requests per hour / 60 minutes in hour)Parallel Controller executes all its children at the same time by kicking off extra virtual threads, it allows JMeter to simulate network footprint for specific use cases like simulating AJAX requests. If you need to produce the load exactly 50 requests per minute - I would suggest going for Constant Throughput Timer which can pause the JMeter Threads in order to reach the target throughput. 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. Constant Timer with a Thread Delay of 5 milliseconds. Go back to the "Test Plan" node. 3. We know that JMeter is an open-source, free tool used to conduct load and performance testing on static and dynamic web applications. jmeter. is correct, but if you leave it as is JMeter will execute requests as fast as it can. 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. If current number of threads is not enough in order to. JSR223 Timer. First of all, Constant Throughput Timer can only pause JMeter threads in order to limit JMeter's throughput to the desired value. Throughput shaping timer or CTT to control the expected throughput. It means that you have to implement the thread delay logic by yourself using one of the supported scripting languages. Do not select "This thread only" value for Timer added at root, as it will change the result. Both the scenarios you have mentioned may require thinking for a moment that there's something fishy if they both use a different unit of time. JMeter offers several options to control the load. Concurrent users are a different way of looking at application traffic. Constant Throughput Timer introduces variable pauses, calculated to keep the total throughput (in terms of samples per. For different time of the day I'd use a different throughput value. The timer tries to produce a constant. 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)}. 7. If above information is not enough try to elaborate your query and include i. Constant Throughput Timer – introduces variable pauses, calculated to keep the total throughput as close as possible to a given figure. log is actually included in the bzt. Constant Throughput Timer allows us to keep total throughput constant. In some cases, the Timer is used to implement the Pacing. 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. Given you have Loop Count set to 1 JMeter will shut down. Tool ที่เราใช้ในการทำ performance test ก็คือ JMeter ซึ่งเป็น tool opensource ที่เขียนด้วย Java สำหรับการทำ load test การจำลอง request จากหลาย user ที่เข้ามาพร้อมกันทำ. 0. The time is calculated from the start of the first sample to the end of the last sample. Concurrency depends on your test plan and application response time. As per documentation: Set Target Throughput = 40. Implementing Pacing with Groovy Scripting. 1 Answer. Throughput increased by factor of 2. Go back to the "Test Plan" node. Figure shows, Constant Throughput Timer for 60 requests per. A Constant Throughput Timer paces the samplers under its influence so that the total number of samples per unit of. The full jmeter. Precise Throughput Timer. JRS223 Timer. 6. Ori Marko Ori Marko. log can be very useful for troubleshooting JMeter-specific issues. In the JMeter script, Constant Timer is used to add a constant delay before processing a sampler. Created attachment timer. Select "Test Plan" node. Here are the workarounds: Calculate the number of threads you need to achieve your target. . e. 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. Test Plan 2. Testing without a JMeter timer can create irregular test results because the simulated requests will come in a different pattern than. Response Assertion. although the Timer is called the Constant Throughput timer, the throughput value does not need to be constant. (2) Throughput Controllers to distribute the load in Percent [20% and 80% of total 24. I have used "jp@gc - Throughput Shaping Timer" But unable to achieve expected TPS. If 0 is given then JMeter will release the same number of users which is defined in the thread group. Throughput controllers for all API calls is set to 100% 'Percent Executions' with 'Per User' ticked off. 0 (inclusive) and 1. The Constant Throughput Timer. JSR223 Timer. ${__P(throughput)}. The various timers provided by JMeter include the constant timer, uniform random timer, constant throughput timer, Poisson random timer and Gaussian random timer. JMeter provides lots of ways to record the value of throughput. In JMeter, there are 9 different Timer types. The Constant Throughput Timer is again a more powerful Timer, not in the same way the previous. If the machine stamps sixty widgets in one minute, it’s throughput is one widget per second. 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. So the real throughput depends on 2. If you need to execute 1000 requests in 60 minutes you need to run 16. The most intuitive thing I could think of was using Constant Throughput Timer to control the number of requests sent,. However, I want to make requests as a single user. Here are the workarounds: Calculate the number of threads you need to achieve your. This class implements a constant throughput timer. The JMeter docs in 3. I have a cloudsearch endpoint on AWS. Second, it works precise. See Also: Serialized Form. Constant Throughput Timer can only pause the threads in order to limit JMeter to the defined number of requests per minute. The name that we have given is displayed on the tree and here. Here is my script detail:->Simple Login request. How to Use “ Constant Throughput Timer ” in JMeter. Improve this answer. 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. If you want to have more customization over how your pacing timer works, you can do so by using Groovy. A good position would be a direct child of the Thread Group. 0. So in total you will have approximately 50 + 5 samplers, the actual amount will vary depending on your response time. This timer generates Poisson arrivals with constant throughput. Para poder realizar esto utilizando solamente JMeter, se encontró que el único elemento que permite modificar el throughput en tiempo de ejecución es el Constant Throughput Timer. Also be. The constant timer is one of the most widely used timers in JMeter. 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. You can see that Start time difference between 1st request and 41st request is 1 minute. JMeter now supports. 6. The timer tries to produce a constant throughput till the end of the test to achieve the target. The. For example, if I set Constant Throughput timer throughput to be 60 per minute,. If your scenario is to execute 100 requests evenly distributed across one minute you should rather go. i can see response times over 40 seconds. Select it and you will see 3 fields as below. July 1, 2023 by PerfMatrix. However it is precise enough only on "minute" level so you might need to play with ramp-up period. Constant Throughput Timer The constant throughput timer is a special type of timer used to create pauses. If you want to execute 300 000 queries in 24 hours you need to introduce a rate limiting on JMeter side to execute 208. 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. Constant Throughput Timer is available out of the box with JMeter. So basically throughput is the number of requests which JMeter was able to within test duration time frame. Sample Time of Sample 2 is 172 ms. This way, You can use constant throughput timer in your load test plan to. So you creating the excessive number of threads and then the timer will. 1 Answer. Throughput Shaping Timer. JMeter cannot send requests faster than your application is capable of responding. Jmeter: Constant throughput Timer with Ultimate Thread Group. JMeter Properties are global, can be accessed from different thread groups and persist all the time while JMeter is running. getMaxThroughputAsInt(ThroughputController. 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. 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,. You can consider switching to Concurrency Thread Group and Throughput Shaping Timer. はじめに. However, in one case I need an additional constant timer because I need to wait a certain time between two requests. 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. 4. Constant Throughput Timer – to specify exact load to generate, i. This video features #Constant #Throughput Timer in. ), you can do this using i. Click on Constant Throughput Timer; This timer has the following fields,. And to manage throughput per minute you could use "Constant Throughput Timer". For ex. 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. Subscribe. On top of that, it tries to maintain the exact amount of arrivals for a given timeframe ( throughputPeriod ). 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. is correct, but if you leave it as is JMeter will execute requests as fast as it can. 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。. Throughput Shaping Timer per se can only pause JMeter threads to limit execution rate to the given number of requests per second. Actually I use a constant throughput timer to keep the frequency constant. 1 Answer. Mouse hovers "Add". JMeter configuration and start from the command line. In Gaussian and Poisson random timer, the random number generation is based on the pre-defined function, but in the. Alternative options are: JMeter also provides a useful timer component to configure or set a constant throughput value to test the application load. Except for /pdfbill (set to 50%), as we only want 25 concurrent users here instead of 50 users. JMeter Perfmon. 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. Trong bài này , ta chỉ tập trung vào Constant Timer thôi vì theo mình nó là đơn giản nhất. The main goal of. Each having its own constant throughput timer . 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. 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. jsr223 request Constant Throughput Timer - 100 rpm. Có rất nhiều timers được cung cấp trong JMeter: Constant Timer, Gaussian Random Timer, Uniform Random Timer, Synchronizing Timer, etc. Concurrency Thread Group doesn’t provide the ability to define initial delay, step transition and ramp-down - which the Stepping Thread Group does. Concurrent users are a different way of looking at application traffic. 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. Listeners, may be placed directly under the test plan, in which case they will apply to all the thread groups. “Calculate throughput “ option can be varied based on the current thread, all threads in your test plan. 4. You can also use a JMeter Function or Variable in the “Thread Delay” input. This will ensure that request is made minimum 100 per minute. This class implements a constant throughput 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. In. Thread Group 3. However I fail to see how Constant Throughput Timer is connected with the timeouts because it slows the number of. So the options are in: Increase the number of threads in the Thread Group to i. Constant Throughput Timer. Constant Throughput Timer treats samplers individually therefore you need to multiply the throughput for the transaction by the number of its children samplers, i. JMeter Timers obey JMeter Scoping Rules so if you put the Constant Throughput Timer under a Thread Group - it will be applied only to this thread group. control. The Uniform Random Timer pauses the thread by a factor of: The next pseudorandom uniformly-distributed value in range between 0. Adding extra node will add extra 200 TMP. The constant timer has the following components. Constant Throughput Timer. I think the documentation was before Ultimate Thread Group was introduced. 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. Precise Throughput Timer. Throughput is calculated as requests/unit of time. That means 40 samples has been executed in 1 minute. This will add Constant Timer at Thread Group level. So you need to supply the sufficient amount. I use JMeter for web testing. You can consider switching to Concurrency Thread Group and Throughput Shaping Timer. Improve this answer. 目标吞吐量（target throughput)单位是每分钟发送的请求数. JMeter Constant Throughput Timer is used as a goal-oriented element which helps to achieve the desired throughput (Total Number of Requests). 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. In JMeter, there are 9 different Timer types. Oct 10, 2022 at 7:06. I also changed the heap variable to this and i have a virtual machine with 32. Hướng dẫn sử dụng Timer trong JMeter – Add Precise Throughput Timer 2. Use CTT in Test Plan level,not in thread group level. Uniform Random Timer 0. 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. Case 2: With sleep time (Using Constant Timer) In this case, throughput will be controlled by introducing sleep time in between threads. Step 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 -. The first thread group randomly picks one of several. JMeter's Constant Throughput Timer can only pause the threads in order to limit requests execution rate to the desired value, it won't kick off extra threads if current amount is not sufficient. The number of requests per second has to be controlled by using constant throughput timer (or the one from jmeter-plugins). 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. 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. This can be used to add some delay/think time between each request. HTTP is a stateful protocol, it means that JMeter's HTTP Request samplers wait for response prior to sending a new request so. Lets. Timer: By default, a JMeter thread executes samplers in sequence without pausing. Right click on Thread Group > Add > Timer > Constant Throughput Timer. JMeter sends specific types of requests to the server; with the help of samplers, the thread group decides which request is required to. As the name implies, the thread group element controls the number of. During this Test(while loads are held) , I am sending another set of login requests from the different machine (say for 100 users). It can be defined in terms of a variable or function call, and the value can be changed during a test. I think it will be more accurate than looking at locust's current_rps tracker, especially at low load. 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. I am developing a JMeter Script according to the below requirement. g. Apache JMeter is an open source Java based tool that enables you to perform functional, load, performance and regression tests on an application. 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. Skip to content Toggle navigation. 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. 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. Add Constant Throughput Timer to your Test plan and configure it to send 30000 requests per minute (500 requests per second). . The application. I have tried with below jmeter tools. Constant Throughput Timer is precise enough at minute level, so if you configure your test to last longer - you will see the throughput going down gradually and after 1st minute it should be throttled to your 100 requests per minute. e. So overall 20 users - ramped up in 1 seconds. jmeter. If you set its value as “1. Synchronizing Timer 同步定时器. July 1, 2023 by PerfMatrix. Gaussian Random Timer. 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。. 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.