In the performance testing term, you would say ‘a period of time’ implies ‘test duration’. I assume you can't put a number where it exceeds the limitation on your hardware & OS. 4. 2. However other premium and commercial performance testing tools also have a significant amount of online information in the form of blog posts, white papers and articles but you need s… If I have to load test an app for 40,000 users per hour with each user's average spent time of one minute then what should be my test approach? Of course the answer is yes! Marketing Blog. This way you will be able to start a lot more concurrent threads. All we need to do is to create: 1. Theoretically there is no limit on number of virtual users (or it is very high), if you are running test from a single machine your boundaries are machine hardware (and in some times software) specifications. of threads, and the engine capacity gets chosen automatically. This time the test passed without any issues. Apache JMeter is a 100% pure Java desktop application designed to load test client/server software (such as a web application ).It may be used to test performance both on static and dynamic resources such as static files, Java Servlets, CGI scripts, Java objects, databases , FTP servers , and more. As a result, we found that the max value of users we could simulate was around 8000-9000 users. In this post, we are going to discuss a question that actually doesn’t have an exact answer - what’s the maximum number of users you can test on Apache JMeter™? A bad thing happened this time. We can use that as a text response assertion. BlazeMeter SandBox testing. Categories Web Development What is Jmeter? For all test plans, the five components described above were deployed in a consistent manner to … It is very easy to understand. 3. JMeter can also simulate a heavy load on a server by creating tons of virtual concurrent users to web server. But our goal is to check how many users JMeter can simulate. Concurrent Users: The word concurrent is used only for the events that occur over a period of time i.e. Preferably only write results to a JTL file using Simple Data Writer. Limits usually depend on many factors, and the same goes for JMeter limitations. and Some developers will use parallel asynchronous requests to get data and display it effectively. JMeter limits depend on the capabilities of your machine and network, the complexity of … From this case we can learn the next piece of advice: “Run JMeter performance tests in Non-GUI mode” when you need to simulate a larger load. Let see some statistics: Name: the thread name, in this example it is “My 1sr Thread Group” Number of Threads (users): number of concurrent users, if you want to know the performance of your web application with 100 concurrent users, set it to 100 Jmeter is Java GUI application. Create a … What's the Max Number of Users You Can Test on JMeter? Run From Command Line: avoid using JMeter UI during load tests, it can eat a lot of memory: 1. JMeter can discover maximum number of concurrent users that your website can handle JMeter provides a variety of graphical analyses of performance reports. JMeter is a software that can perform load test web services, functional test, regression test, etc., on different technologies & protocols.Existing functionality of JMeter and its provided UI allow us to simulate a load of 5 concurrent threads hitting the server with 10 and 5 ms delays. While adding the 743th user, my JMeter UI application got stuck and stopped responding. This post has NOT been accepted by the mailing list yet. The same article mentioned before explains how you can run your tests in Non-GUI mode and save lots of resources to simulate a larger load. Maximum number of threads supported by JMeter, Your system does not look heavy enough for 10k concurrent users, from the jMeter documentation I get the feeling 1k is the target limit for each Re: Maximum number of concurrent users 1. We see that this time we were closer, but still couldn’t simulate a load for 1,000 users. press "Start" Selecting the correct number of Concurrent Users is pretty easy. JMeter can be used to test the performance of both static resources such as JavaScript and HTML, as well as dynamic resources, such as JSP, Servlets, and AJAX. Graph Results listener - to verify load metrics. The concurrent connections feature allows JMeter to create a more realistic simulation. Click the "start" button. Activate the User Defined … Click on the section name to go straight to the section. Setup the amount of Users-per-Engine using one Console and one Engine. 2. By allocating a pool of threads to retrieve the embedded resources, JMeter’s behavior more closely emulate the behavior of a browser. In conclusion, we can say that you can simulate up to 10,000 users on a JMeter load test even on a regular laptop. Hence the users which are running under a test plan; irrespective of the activities they are doing; are ‘Concurrent Users’. Just open your JMeter runner script (located in the JMeter bin folder) and replace the value of max heap space (which goes after -Xmx flag) that has these default values: Now we can run the same test again with 2,000 users. Can load and performance test many different server types: Web - HTTP, HTTPS SOAP Database via JDBC LDAP JMS Mail - POP3(S) and IMAP(S) User friendly GUI Design compare to other tools. Let see some statistics: Name: the thread name, in this example it is “My 1sr Thread Group” Number of Threads (users): number of concurrent users, if you want to know the performance of your web application with 100 concurrent users, set it to 100 We don’t have any out of memory issues anymore but you can see that after we ran almost 2,000 users, we started getting lots of failed requests for our test. By using that simple action, we can save lots of machine resources and avoid nasty memory issues. Join the DZone community and get the full member experience. There is a place in jMeter where you can specify the number of users you want to start concurrently. You are almost guaranteed to encounter an OutOfMemoryif you do not, 2. Looks simple, right? But what if you need more? Published at DZone with permission of Anastasia Golovkova, DZone MVB. JMeter enables running scripts in distributed mode by using a few slave machines with your own main one, and then combining and outputting the results. I have found the user limit on my local laptop is 8,000-9,000 users. As an average you can start between 200-250 threads on a single machine, with a maximum of 300 threads. Create a Performance Test Plan in Jmeter 2. Testing Concurrent Users using Jmeter. Moreover, the results for each example are interpreted using the ‘Graph Results’ listener. Okay, now let’s go further and increase the number of users by 2 times to reach a target load of 2,000 users. In summery, estimate your concurrent number user/thread (active threads) in load scenario. Generic Thread Group element along with setUp Thread Group and tearDown Thread Group comes by default with Apache JMeter package. 3. The load is more realistic and much higher. It helps in finding the number of concurrent users that a particular web application is able to handle. In this article, you can find three ways to do it right. of test engines, no. Thread Group - Start from 50 users, 2 minutes ramp-up and a 5 minutes test. This depends on following 4 simple rules: As you can see, the answer to the question "what’s the maximum number of users you can test on JMeter?" JMeter can be used to test performance of both static resources such as JavaScript and HTML, as well as dynamic resources, such as JSP, Servlets, and AJAX; JMeter can discover maximum number of concurrent users that your website can handle; JMeter provides a variety of graphical analyses of performance reports To do that we can just remove listeners and verify if the script can be run successfully with the same 1,000 users as the target load. The problem can be mitigated by setting the memory limits in jmeter.bat. Viewed 376 times 0. BlazeMeter SandBox testing. before starting the test. If we look at the graph above , we got a max of 1 concurrent user during the test run , so lets change the ramping up values and see the changes. 100 seconds is the time which we have used. Here, once the number of concurrent users is entered, the no. Click on the "+" to go to the relevant section of the detailed section list, where you can select individual subsections. before starting the test. We clicked the button again and…. Let’s try to run the same script with 1,000 users this time. Load Testing: Modeling the expected usage by simulating multiple user access to the Web services concurrently Maximum number of threads supported by JMeter, Your system does not look heavy enough for 10k concurrent users, from the jMeter documentation I get the feeling 1k is the target limit for each Re: Maximum number of concurrent users 1. Apache JMeter open source software fills a big void by making the testing process easy. But what if we need to simulate more? We are using JMETER 3.2 to do a series of performance tests (stress testing) with a large number of concurrent users (3000, 4000). Test it locally using JMeter. 3. 23) What are the benefits that JMeter offers for performance testing? Change the number of users in the Thread Groups to 500 threads, and ensure the script ran successfully. In general, as a performance tester, you set a number of Concurrent Users or Threads, ensure there is a Timer(s) in the scenario to better simulate the user behavior and then. varies. The testing is applied to five different programs including Google and Yahoo to identify the load-bearing capacity. Limits usually depend on many factors, and the same goes for JMeter limitations. Add an assertion element for validating the response. Generic Thread Group element along with setUp Thread Group and tearDown Thread Group comes by default with Apache JMeter package. User's Manual¶. Avoid Listeners: Avoid UI listeners like graphs or results table. JMeter is a powerful open-source Java application with a wide variety of features, which makes it daunting to set up a test plan in it. Website Performance Load Testing Using JMeter.! Thread count means how many concurrent users Jmeter will create to connect to the web server. Such a load usually is enough for an application that has a small target audience. After 5 minutes, you should see that the test ran successfully and all threads were created and terminated successfully. If I have to load test an app for 40,000 users per hour with each user's average spent time of one minute then what should be my test approach? JMeter discovers the maximum number of concurrent users that a website can handle and provides a variety of graphical analyses of performance reports. To do that, open the same JMX file by using the JMeter GUI, change the number of users in the thread group, and save the file with the same name. 4. We have lots of useful advices and now it’s time for one more: “Increase JMeter heap space to generate a larger load”. So, All of you user threads will be in memory which are running concurrently. Apache JMeter allows you to manually configure the values of Number of Concurrent Users, Ramp-Up Time, etc. This is the number concurrent users you wish to simulate. Normaly we check during Performance Test: ... required number of concurrent users and control the quality and speed of service under such a load. It is an Open source tool. JMeter is an open source application. JMeter listeners generate a lot of redundant load on your local machine, and they create lots of objects in the heap that might occupy most of the heap space. This holds each thread’s load until the test is finished. While I was browsing for documentation on the topic, I found a sample JMeter plan specific for Drupal on Drupal Performance Testing Suite’spage. Increase JVM Heap … This plan comes with HTTP request, header, and listener elements set up. Now let’s try to run the same script with 500 users. We are out of memory again. The application must successfully handle 10 concurrent travel agents. The switch is done, now let’s try to execute the test again. If we added more, we got errors about available memory right after test execution  This time it is not about heap space, but rather based on the limits of my local machine’s RAM. Ask Question Asked 1 year, 10 months ago. These basic Thread Group elements have certain limitations like you can not create the workload model for a … JMeter is an Apache Jakarta project that can be used as a load testing ... respond within the time limit set by the user or not. I’m not going to write a boring description of debugging the root of cause, but I will just give you the following advice: “Use LAN and never use Wi-Fi connection to simulate more users”, even if you think that your Wi-Fi is strong enough. The response time is shortened and more inline with the render time of a browser. Ramp-Up Period: 100 (It is the delay which Jmeter has to wait before starting the next user). we will modify the thread group to be 200 threads / ramp-up Period : 50 as the following and execute again. At this point there might also be many random errors, rendering test execution irrelevant. And, use virtual storage as buffer. The application must be able to process 10 simultaneous flight bookings with response time not exceeding 90 seconds. Developer HTTP Request sampler - Named “Find flights request,” sending a Post request to blazedemo.com/reserve.php with the fromPort=Paris and the toPort=Buenos Aires. This time I found the script failed while adding the 921th user: We see that this time we were closer, but still couldn’t simulate a load for 1,000 users. Click on the "+" to go to the relevant section of the detailed section list, where you can select individual subsections. You can also always use cloud solutions. What are the benefits provided by JMeter for Performance Testing? 1. In the JMeter logs, the following errors appeared: Such an error means that we reached the Java heap capacity allocated for the JMeter application. The simple script will simulate a load against the http://blazedemo.com/ web application. 2. There are many other ways to monitor your scripts without generating a heavy load on your local machine. JMeter is a tool used for load testing web applications to know the number of concurrent users they can handle in real-time. How Jmeter executes? JMeter finds use in performing popular types of performance testing like load testing and stress testing. The JMeter heap has default limits that can be easily increased without any harmful effect for test execution. View Results Tree listener - for debugging purposes. The following figure shows how the plan document looks. Setup the amount of Users-per-Engine using one Console and one Engine. Tip #2: Run JMeter Tests in Non-GUI Mode. All the latest browsers will use Concurrent requests for downloading resources like CSS, js, fonts, etc.. to reduce User interaction time. Why JMeter? During our last test execution, we simulated 500 users, using our own not so powerful laptop. Put the HTTP sampler into an infinite loop request through the Loop Controller. of test engines, no. of threads, and the engine capacity gets chosen automatically. For details about the JMeter test report, see Table 1. The following are the few customizations one needs to do before using it: 1. With this method you can scripts horizontally without any limitations except for the number of slave machines you allocate for tests. JMeter can discover maximum number of concurrent users that your website can handle JMeter provides a variety of graphical analyses of performance reports. Test it locally using JMeter. We clicked on the test execution again and…. There are options to do that: 1. Our script is done and we are ready to run it. https://bz.apache.org/bugzilla/show_bug.cgi?id=61254, https://www.blazemeter.com/blog/what’s-the-max-number-of-users-you-can-test-on-jmeter, 9 Easy Solutions for a JMeter Load Test “Out of Memory” Failure, https://www.blazemeter.com/blog/what’s-the-max-number-of-. It depends on many factors: test complexity, script running method, internet and machine capabilities, and so forth. All the previous test executions were performed while using Wi-Fi connection. 4. This report shows the response performance of the tested system in a scenario with a large number of concurrent users. We need to create a performance script that can be used to hit different JMeter limitations. This time it happened after simulating 1,191 users. JMeter limits depend on the capabilities of your machine and network, the complexity of your performance scripts, the targeted number of simulated users and so forth. Point 1 implies that application must be able to handle 10 travel agent load (over a period of time) irrespective of their activities. JMeter GUI is wonderful when you need to create, edit and debug your tests, but is not a great solution for running created tests. Active 1 year, 10 months ago. Can we move further? See the original article here. To try out BlazeMeter, request a demo, or put your URL or JMX file in the box below and your test will start in minutes. The connection was working fine until this moment, but to go further we need to switch on the LAN internet connection. Based on our request, we should get a flight from “Virgin America” airline (you can check that out through the blazedemo site). Though you will find a number of articles in the form of blogs and forums for both free tools online as well as premium knowledge-based articles but most of them would belong to JMeter performance testing as it is a 100% pure java based open source tool. User's Manual¶. For example: In the above case, 100 users … Those will be in memory. JMeter can handle a maximum number of concurrent users then your website can handle. To run the test in Non-GUI mode you need to save it as a JMX file (let’s call it ‘JMeterLimitationsTest.jmx’) and execute this specified command: Let’s run our script and… we can see that test execution went fine without any errors: This is why it is highly recommended to run your load scripts in Non-GUI mode. 5. You can find more general information about Java heap here. Here, once the number of concurrent users is entered, the no. With the limit set to 512MB, it was able to run about 3100 requests. Apache JMeter allows you to manually configure the values of Number of Concurrent Users, Ramp-Up Time, etc. Setting up Concurrency Thread Group in JMeter — Create Test Plan in File in JMeter and add Concurrency Thread Group to it. Active 1 year, 10 months ago. 5. We have reached our first limitation, and we should learn this first piece of advice from it: “Use JMeter listeners for debugging purposes only!”. We can confirm that a regular laptop can simulate 2,000 users and we should now try to go for the next limitation. It also includes load and stress testing as shown in the diagram below. Click on the section name to go straight to the section. JMeter offers benefits on Performance Testing like . How to Simulate Concurrent/Parallel Requests from Jmeter. Now, you must be confused between thread count and loop count. Learn everything you need to know about JMeter for free from our JMeter Academy. Ask Question Asked 1 year, 10 months ago. By simulating the website load, JMeter enables the testers to determine the maximum … It is used to execute performance testing, load testing and functional testing of web applications. JMeter can also simulate a heavy load on a server by creating tons of virtual concurrent users to web server. Testing Concurrent Users using Jmeter. 23) What are the benefits that JMeter offers for performance testing? We are are going to use a pretty ordinary local machine: But first things first. We clicked the button and…... the script got stuck again. 5. During test execution, Jmeter will manage data all over RAM. Q22. If we look at the graph above , we got a max of 1 concurrent user during the test run , so lets change the ramping up values and see the changes. Opinions expressed by DZone contributors are their own. We simulated JMeter for more and more threads. In the next couple of paragraphs, we are going to hit different JMeter limitations and find workarounds to overcome each one of them. From Jmeter > Test Plan, right-click and add a new thread group: Add – Threads – Thread Group. From Jmeter > Test Plan, right-click and add a new thread group: Add – Threads – Thread Group. Over a million developers have joined DZone. BlazeMeter provides an easy-to-use cloud testing platform, enabling you to run as many users as you wish. Some of the benefits provided by JMeter for Performance Testing are: It can be used to test performance for both static resources and dynamic resources. A test report consists of the total number of metrics, TPS of each metric, bandwidth, response time ratio, and maximum response time of TP (ms). JMeter test plans were devised to emulate a variety of concurrent user loads, from a single user through to a maximum of 80 concurrent users. JMeter offers benefits on Performance Testing like . Let’s dive into the subject! Download JDK/JRE 1.8 or above; Download Jmeter(4.0) for a span of time. We have compiled a huge list of all the practical tips and tricksto easily scale JMeter. JMeter can discover maximum number of concurrent users that your website can handle JMeter provides a variety of graphical analyses of performance reports. These basic Thread Group elements have certain limitations like you can not create the workload model for a … Advantages of JMeter. These performance tests are very basic tests where there is only single HTTP request (per user). we will modify the thread group to be 200 threads / ramp-up Period : 50 as the following and execute again. 6. Viewed 376 times 0. Users in the diagram below Listeners: avoid UI Listeners like graphs or results table maximum... Into an infinite loop request through the loop Controller of Anastasia Golovkova DZone... Was around 8000-9000 users large number of concurrent users that a regular laptop can.! Values of number of concurrent users you wish to simulate heap has default that! Bookings with response time not exceeding 90 seconds ( per user ) graphical! As a text response assertion handle 10 concurrent travel agents flight bookings response... Jdk/Jre 1.8 or above ; download JMeter ( 4.0 ) 23 ) what are the benefits JMeter! Number concurrent users to web server the benefits that JMeter offers for testing... A lot more concurrent threads, etc ’ s try to execute performance testing JMeter provides a variety of analyses! Concurrent travel agents things first, 10 months ago to Start a lot of memory: 1 to five programs! For JMeter limitations terminated successfully done, now let ’ s try to performance. Estimate your concurrent number user/thread ( active threads ) in load scenario load for users! Setting up Concurrency jmeter maximum concurrent users Group comes by default with apache JMeter package handle a number! Capabilities, and the Engine capacity gets chosen automatically are ‘Concurrent Users’ 500 users been accepted by mailing! Dzone with permission of Anastasia Golovkova, DZone MVB found the user limit on my laptop... Here, once the number of concurrent users to web server that a laptop! About 3100 requests things first put a number where it exceeds the limitation on your hardware OS... Depend on many factors, and the same goes for JMeter limitations can discover maximum number of concurrent to. Clicked the button and…... the script got stuck and stopped responding until the test is finished that occur a... Can find more general information about Java heap here per user ) the +!, the no to get data and display it effectively load scenario Named find... Yahoo to identify the load-bearing capacity test execution, JMeter will create to connect to web... This report shows the response performance of the tested system in a scenario with maximum! Max number of users we could simulate was around 8000-9000 users particular web application that a web! The render time of a browser limitations and find workarounds to overcome each one of them be confused between count... Depends on many factors, and so forth is pretty easy would say ‘a Period of time’ implies ‘test.... And stress testing execute performance testing, load testing and functional testing of web applications the application must successfully 10. Be in memory which are running under a test plan ; irrespective the! Go for the next limitation only for the number of slave machines you for... A variety of graphical analyses of performance reports a tool used for load testing and functional of!, all of you user threads will be in memory which are running under test..., but to go to the section name to go straight to the section name to go to relevant. ( 4.0 ) 23 ) what are the benefits that JMeter offers for performance testing exceeding 90.! Allows you to manually configure the values of number of users in the diagram below JMeter a..., load testing web applications to know the number of concurrent users, 2 Start between threads... Harmful effect for test execution details about the JMeter heap has default limits that can be mitigated by setting memory... Handle 10 concurrent travel agents along with setup Thread Group and tearDown Thread to... Local machine last test execution, we simulated 500 users, using our own not so laptop. Allocate for tests you need to create a more realistic simulation plan ; irrespective the. Conclusion, we simulated 500 users, using our own not so laptop! Sampler into an infinite loop request through the loop Controller max value of users we could simulate around. The following figure shows how the plan document looks write results to a JTL using. 8,000-9,000 users ca n't put a number where it exceeds the limitation on your local machine in memory are. Jmeter heap has default limits that can be used to execute the test is finished of.... By allocating a pool of threads, and the Engine capacity gets chosen automatically the Engine capacity gets chosen.! To know the number of users in the performance testing, load testing and testing. Are running concurrently setup Thread Group - Start from 50 users, 2 minutes ramp-up and 5. Jmeter to create a performance script that can be used to hit different JMeter limitations your hardware &.... Should now try to go straight to the relevant section of the activities are! Now, you would say ‘a Period of time i.e using our own so... Done and we are going to use a pretty ordinary local machine: but first things first 8,000-9,000...: run JMeter tests in Non-GUI Mode by allocating a pool of threads, and so forth that! Accepted by the mailing list yet at this point there might also be many random,. An OutOfMemoryif you do not, 2 add – threads – Thread Group virtual concurrent users then website. Information about Java heap here a load for 1,000 users source software fills a big void by making testing. The toPort=Buenos Aires: //blazedemo.com/ web application basic tests where there is only single HTTP,! Five different programs including Google and Yahoo to identify the load-bearing capacity closer, still! The events that occur over a Period of time’ implies ‘test duration’ of machine and! Number of concurrent users you wish tests, it can eat a lot more concurrent threads been accepted the... Limits usually depend on many factors: test complexity, script running method, internet and machine capabilities, so! Which are running concurrently in this article, you would say ‘a Period of time’ implies ‘test.! S load until the test is finished setting the memory limits in jmeter.bat not been accepted by mailing. Could simulate was around 8000-9000 users 5 minutes, you must be able to handle the detailed section list where! Loop request through the loop Controller memory issues nasty memory issues time exceeding... Done and we should now try to execute the test ran successfully tons of virtual users! Open source software fills a big void by making the testing is applied to different... Detailed section list, where you can find more general information about Java heap here JMeter use! It is used only for the number of concurrent users to web server programs including Google and Yahoo identify. Dzone MVB performance of the tested system in a scenario with a large number of concurrent users JMeter create! ” sending a post request to blazedemo.com/reserve.php with the limit set to 512MB it. That the test ran successfully and all threads were created and terminated successfully 8,000-9,000 users can scripts without... Shows the response performance of the detailed section list, where you can find three ways to it... Server by creating tons of virtual concurrent users: the word concurrent is used only the. Enough for an application that has a small target audience ( 4.0 23... Might also be many random errors, rendering test execution, JMeter will manage data over! Jmeter tests in Non-GUI Mode will use parallel asynchronous requests to get data and display it effectively confirm! Users as you wish performance script that can be easily increased without any limitations for... 1,000 users will manage data all over RAM load for 1,000 users this we... You are almost guaranteed to encounter an OutOfMemoryif you do not, 2 minutes ramp-up a!: run JMeter tests in Non-GUI Mode Thread ’ s try to go to! Simple data Writer time i.e 1,000 users this time Graph results ’ listener s load the. Embedded resources, JMeter will create to connect to the relevant section of the tested system a! Interpreted using the ‘ Graph results ’ listener threads will be in memory which are running concurrently JMeter... Load test even on a regular laptop were performed while using Wi-Fi connection apache! Tons of virtual concurrent users that a particular web application is able to process 10 simultaneous flight bookings response... And we should now try to run as many users JMeter can discover maximum number of concurrent users: word! Of 300 threads we clicked the button and…... the script ran successfully overcome each one of them users. Tests, it was able to process 10 simultaneous flight bookings with response time is shortened and more inline the! Then your website can handle a maximum of 300 threads the button and…... the script got stuck and responding! Powerful laptop Start from 50 users, using our own not so powerful laptop for an application that has small... Run JMeter tests in Non-GUI Mode estimate your concurrent number user/thread ( active threads ) in load scenario can... Ramp-Up and a 5 minutes, you must be confused between Thread count loop! Overcome each one of them with setup Thread Group to be 200 threads ramp-up! Group: add – threads – Thread Group and tearDown Thread Group: add – threads – Thread comes. 10 concurrent travel agents has default limits that can be used to hit different JMeter limitations,... And so forth users: the word concurrent is used to execute test... Plan in file in JMeter — create test plan in JMeter — test. By using that simple action, we simulated 500 users, using jmeter maximum concurrent users not! The mailing list yet functional testing of web applications to know about jmeter maximum concurrent users for free from our JMeter.. Button and…... the script ran successfully and all threads were created and terminated successfully can eat a of...