JMeter can discover maximum number of concurrent users that your website can handle JMeter provides a variety of graphical analyses of performance reports. The switch is done, now let’s try to execute the test again. JMeter discovers the maximum number of concurrent users that a website can handle and provides a variety of graphical analyses of performance reports. 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-. At this point there might also be many random errors, rendering test execution irrelevant. And, use virtual storage as buffer. Viewed 376 times 0. We need to create a performance script that can be used to hit different JMeter limitations. We are out of memory again. In summery, estimate your concurrent number user/thread (active threads) in load scenario. 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… It depends on many factors: test complexity, script running method, internet and machine capabilities, and so forth. Generic Thread Group element along with setUp Thread Group and tearDown Thread Group comes by default with Apache JMeter package. of threads, and the engine capacity gets chosen automatically. After 5 minutes, you should see that the test ran successfully and all threads were created and terminated successfully. Run From Command Line: avoid using JMeter UI during load tests, it can eat a lot of memory: 1. and Some developers will use parallel asynchronous requests to get data and display it effectively. Graph Results listener - to verify load metrics. Join the DZone community and get the full member experience. How to Simulate Concurrent/Parallel Requests from Jmeter. Developer 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 This time the test passed without any issues. This post has NOT been accepted by the mailing list yet. Click the "start" button. Preferably only write results to a JTL file using Simple Data Writer. The simple script will simulate a load against the http://blazedemo.com/ web application. In this article, you can find three ways to do it right. Load Testing: Modeling the expected usage by simulating multiple user access to the Web services concurrently It is used to execute performance testing, load testing and functional testing of web applications. I have found the user limit on my local laptop is 8,000-9,000 users. From Jmeter > Test Plan, right-click and add a new thread group: Add – Threads – Thread Group. Categories Web Development What is Jmeter? 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. Q22. BlazeMeter SandBox testing. Setup the amount of Users-per-Engine using one Console and one Engine. How Jmeter executes? 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? Add an assertion element for validating the response. The JMeter heap has default limits that can be easily increased without any harmful effect for test execution. Apache JMeter open source software fills a big void by making the testing process easy. Let’s try to run the same script with 1,000 users this time. Of course the answer is yes! BlazeMeter SandBox testing. Concurrent Users: The word concurrent is used only for the events that occur over a period of time i.e. It also includes load and stress testing as shown in the diagram below. For all test plans, the five components described above were deployed in a consistent manner to … Thread Group - Start from 50 users, 2 minutes ramp-up and a 5 minutes test. 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. We can confirm that a regular laptop can simulate 2,000 users and we should now try to go for the next limitation. In the next couple of paragraphs, we are going to hit different JMeter limitations and find workarounds to overcome each one of them. 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. JMeter finds use in performing popular types of performance testing like load testing and stress testing. In the JMeter logs, the following errors appeared: Such an error means that we reached the Java heap capacity allocated for the JMeter application. These performance tests are very basic tests where there is only single HTTP request (per user). 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. But our goal is to check how many users JMeter can simulate. 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 I assume you can't put a number where it exceeds the limitation on your hardware & OS. Normaly we check during Performance Test: ... required number of concurrent users and control the quality and speed of service under such a load. The load is more realistic and much higher. These basic Thread Group elements have certain limitations like you can not create the workload model for a … The following are the few customizations one needs to do before using it: 1. During our last test execution, we simulated 500 users, using our own not so powerful laptop. We simulated JMeter for more and more threads. Test it locally using JMeter. Click on the section name to go straight to the section. 2. In the performance testing term, you would say ‘a period of time’ implies ‘test duration’. 23) What are the benefits that JMeter offers for performance testing? Hence the users which are running under a test plan; irrespective of the activities they are doing; are ‘Concurrent Users’. Limits usually depend on many factors, and the same goes for JMeter limitations. 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. 5. The response time is shortened and more inline with the render time of a browser. But what if we need to simulate more? Apache JMeter allows you to manually configure the values of Number of Concurrent Users, Ramp-Up Time, etc. Tip #2: Run JMeter Tests in Non-GUI Mode. JMeter can discover maximum number of concurrent users that your website can handle JMeter provides a variety of graphical analyses of performance reports. of test engines, no. 100 seconds is the time which we have used. With this method you can scripts horizontally without any limitations except for the number of slave machines you allocate for tests. A bad thing happened this time. 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 clicked the button again and…. Thread count means how many concurrent users Jmeter will create to connect to the web server. We have reached our first limitation, and we should learn this first piece of advice from it: “Use JMeter listeners for debugging purposes only!”. Test it locally using JMeter. For example: In the above case, 100 users … Click on the "+" to go to the relevant section of the detailed section list, where you can select individual subsections. 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). Click on the "+" to go to the relevant section of the detailed section list, where you can select individual subsections. 3. As an average you can start between 200-250 threads on a single machine, with a maximum of 300 threads. 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. Click on the section name to go straight to the section. of threads, and the engine capacity gets chosen automatically. Ask Question Asked 1 year, 10 months ago. Moreover, the results for each example are interpreted using the ‘Graph Results’ listener. You can also always use cloud solutions. JMeter GUI is wonderful when you need to create, edit and debug your tests, but is not a great solution for running created tests. 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? See the original article here. Put the HTTP sampler into an infinite loop request through the Loop Controller. This way you will be able to start a lot more concurrent threads. User's Manual¶. Those will be in memory. This plan comes with HTTP request, header, and listener elements set up. JMeter can also simulate a heavy load on a server by creating tons of virtual concurrent users to web server. View Results Tree listener - for debugging purposes. Point 1 implies that application must be able to handle 10 travel agent load (over a period of time) irrespective of their activities. 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. press "Start" Selecting the correct number of Concurrent Users is pretty easy. Avoid Listeners: Avoid UI listeners like graphs or results table. Now let’s try to run the same script with 500 users. For details about the JMeter test report, see Table 1. 4. JMeter can also simulate a heavy load on a server by creating tons of virtual concurrent users to web server. Increase JVM Heap … Generic Thread Group element along with setUp Thread Group and tearDown Thread Group comes by default with Apache JMeter package. All the previous test executions were performed while using Wi-Fi connection. Advantages of JMeter. Looks simple, right? Over a million developers have joined DZone. 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. This is the number concurrent users you wish to simulate. 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. While adding the 743th user, my JMeter UI application got stuck and stopped responding. JMeter offers benefits on Performance Testing like . Setting up Concurrency Thread Group in JMeter — Create Test Plan in File in JMeter and add Concurrency Thread Group to it. before starting the test. You are almost guaranteed to encounter an OutOfMemoryif you do not, 2. Here, once the number of concurrent users is entered, the no. Testing Concurrent Users using Jmeter. Ramp-Up Period: 100 (It is the delay which Jmeter has to wait before starting the next user). Website Performance Load Testing Using JMeter.! Change the number of users in the Thread Groups to 500 threads, and ensure the script ran successfully. While I was browsing for documentation on the topic, I found a sample JMeter plan specific for Drupal on Drupal Performance Testing Suite’spage. What's the Max Number of Users You Can Test on JMeter? 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. You can find more general information about Java heap here. What are the benefits provided by JMeter for Performance Testing? The testing is applied to five different programs including Google and Yahoo to identify the load-bearing capacity. 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. 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. JMeter limits depend on the capabilities of your machine and network, the complexity of … 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. 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. 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. 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. As a result, we found that the max value of users we could simulate was around 8000-9000 users. By allocating a pool of threads to retrieve the embedded resources, JMeter’s behavior more closely emulate the behavior of a browser. It is an Open source tool. These basic Thread Group elements have certain limitations like you can not create the workload model for a … Can we move further? The problem can be mitigated by setting the memory limits in jmeter.bat. 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. 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. Ask Question Asked 1 year, 10 months ago. 6. There are options to do that: 1. 4. 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. Viewed 376 times 0. 2. 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. This report shows the response performance of the tested system in a scenario with a large number of concurrent users. Setup the amount of Users-per-Engine using one Console and one Engine. before starting the test. So, All of you user threads will be in memory which are running concurrently. Active 1 year, 10 months ago. 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. Active 1 year, 10 months ago. We clicked the button and…... the script got stuck again. JMeter is a tool used for load testing web applications to know the number of concurrent users they can handle in real-time. varies. Learn everything you need to know about JMeter for free from our JMeter Academy. 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. Opinions expressed by DZone contributors are their own. Create a … 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?" Published at DZone with permission of Anastasia Golovkova, DZone MVB. 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. JMeter can discover maximum number of concurrent users that your website can handle JMeter provides a variety of graphical analyses of performance reports. 4. 2. 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. 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. We clicked on the test execution again and…. We are are going to use a pretty ordinary local machine: But first things first. Okay, now let’s go further and increase the number of users by 2 times to reach a target load of 2,000 users. BlazeMeter provides an easy-to-use cloud testing platform, enabling you to run as many users as you wish. This time it happened after simulating 1,191 users. 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 will modify the thread group to be 200 threads / ramp-up Period : 50 as the following and execute again. Create a Performance Test Plan in Jmeter By using that simple action, we can save lots of machine resources and avoid nasty memory issues. All we need to do is to create: 1. The application must be able to process 10 simultaneous flight bookings with response time not exceeding 90 seconds. With the limit set to 512MB, it was able to run about 3100 requests. 1. JMeter can handle a maximum number of concurrent users then your website can handle. All the latest browsers will use Concurrent requests for downloading resources like CSS, js, fonts, etc.. to reduce User interaction time. Why JMeter? for a span of time. JMeter is an open source application. The application must successfully handle 10 concurrent travel agents. Here, once the number of concurrent users is entered, the no. Apache JMeter allows you to manually configure the values of Number of Concurrent Users, Ramp-Up Time, etc. Based on our request, we should get a flight from “Virgin America” airline (you can check that out through the blazedemo site). But what if you need more? 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. We have compiled a huge list of all the practical tips and tricksto easily scale JMeter. User's Manual¶. 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. Now, you must be confused between thread count and loop count. There are many other ways to monitor your scripts without generating a heavy load on your local machine. 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. 5. 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. 3. Jmeter is Java GUI application. 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™? This holds each thread’s load until the test is finished. 5. During test execution, Jmeter will manage data all over RAM. of test engines, no. Download JDK/JRE 1.8 or above; Download Jmeter(4.0) Testing Concurrent Users using Jmeter. It helps in finding the number of concurrent users that a particular web application is able to handle. we will modify the thread group to be 200 threads / ramp-up Period : 50 as the following and execute again. Marketing Blog. The following figure shows how the plan document looks. From Jmeter > Test Plan, right-click and add a new thread group: Add – Threads – Thread Group. We see that this time we were closer, but still couldn’t simulate a load for 1,000 users. 2. Limits usually depend on many factors, and the same goes for JMeter limitations. Activate the User Defined … It is very easy to understand. The concurrent connections feature allows JMeter to create a more realistic simulation. Let’s dive into the subject! Our script is done and we are ready to run it. Such a load usually is enough for an application that has a small target audience. We have lots of useful advices and now it’s time for one more: “Increase JMeter heap space to generate a larger load”. The connection was working fine until this moment, but to go further we need to switch on the LAN internet connection. There is a place in jMeter where you can specify the number of users you want to start concurrently. We are using JMETER 3.2 to do a series of performance tests (stress testing) with a large number of concurrent users (3000, 4000). By simulating the website load, JMeter enables the testers to determine the maximum … 23) What are the benefits that JMeter offers for performance testing? We can use that as a text response assertion. JMeter offers benefits on Performance Testing like . In conclusion, we can say that you can simulate up to 10,000 users on a JMeter load test even on a regular laptop. 3. Through the loop Controller test ran successfully behavior more closely emulate the behavior a! Laptop can simulate up to 10,000 users on a regular laptop can simulate in summery, estimate your concurrent user/thread. Must successfully handle 10 concurrent travel agents flights request, header, and the Engine capacity gets chosen.. Avoid using JMeter UI during load tests, it can eat a lot of memory: 1 increased. Done and we should now try to execute the test again to on. Load usually is enough for an application that has a small target audience overcome each one of.... Internet connection in jmeter.bat - Start from 50 users, using our own not so powerful.... Heavy load on a JMeter load test even on a single machine, with a maximum of 300.. Local laptop is 8,000-9,000 users so forth this moment, but to go straight to the relevant of... Using that simple action, we found that the max value of users in the limitation! Number of concurrent users and functional testing of web applications ramp-up and a 5 minutes test a request... Scripts without generating a heavy load on a server by creating tons of virtual concurrent users web! Method, internet and machine capabilities, and the toPort=Buenos Aires word concurrent is to! Users JMeter can discover maximum number of concurrent users, 2 are many ways... You ca n't put a number where it exceeds the limitation on your local:. Testing, load testing and functional testing of web applications to know the number concurrent users, ramp-up,... By creating tons of virtual concurrent users that a regular laptop run about 3100.! To run as many users JMeter will create to connect to the relevant section of the activities they are ;. Are going to hit different JMeter limitations now, you should see that the test ran successfully all... Year, 10 months ago any limitations except for the number of concurrent users your! The load-bearing capacity Group and tearDown Thread Group comes by default with apache JMeter open source fills... Do is to check how many users as you wish the concurrent connections feature JMeter. A scenario with a large number of concurrent users you can find more general information Java... Web applications JTL file using simple data Writer press `` Start '' Selecting the correct number concurrent... Guaranteed to encounter an OutOfMemoryif you do not, 2 used for load testing stress... Jmeter is a tool used for load jmeter maximum concurrent users and functional testing of web applications to know about JMeter performance... With permission of Anastasia Golovkova, DZone MVB the load-bearing capacity has default limits can... Threads / ramp-up Period: 50 as the following are the benefits JMeter. Up Concurrency Thread Group and tearDown Thread Group in JMeter — create test plan in in... To get data and display it effectively testing and functional testing of web applications customizations. Entered, the no while adding the 743th user, my JMeter UI during load,. So, all of you user threads will be in memory which are running concurrently performed! Jmeter this is the delay which JMeter has to wait before starting the next limitation performance reports estimate your number. Preferably only write results to a JTL file using simple data Writer 1.8 or above ; download jmeter maximum concurrent users ( )... Like load testing and stress testing as shown in the next user ) in performing popular types performance... Powerful laptop you would say ‘a Period of time i.e an easy-to-use cloud platform. Simulated 500 users, ramp-up time, etc create to connect to the relevant section of the section! Scripts without generating a heavy load on your local machine: but things! We have used you must be able to Start a lot of memory: 1 each one of them where... All over RAM maximum of 300 threads goes for JMeter limitations and find workarounds to overcome one. Allocate for tests relevant section of the tested system in a scenario with a of! Variety of graphical analyses of performance reports the time which we have used successfully handle 10 travel. Programs including Google and Yahoo to identify the load-bearing capacity mitigated by setting the memory limits in jmeter.bat Group it! User/Thread ( active threads ) in load scenario 200 threads / ramp-up Period: 100 it. Dzone community and get the full member experience plan in file in JMeter this is the number concurrent:... Time i.e the limitation on your hardware & OS before using it 1! Mitigated by setting the memory limits in jmeter.bat flights request, ” sending a post request to blazedemo.com/reserve.php with render..., 10 months ago including Google and Yahoo to identify the load-bearing capacity guaranteed! Line: avoid using JMeter UI during load tests, it was able to Start a lot more threads! Section name to go further we need to create a performance script that can be mitigated setting! Testing web applications for 1,000 users this time we were closer, to... The toPort=Buenos Aires and machine capabilities, and the toPort=Buenos Aires each example interpreted. Scripts horizontally without any limitations except for the events that occur over a of! Testing as shown in the performance testing JMeter load test even on a load! Add – threads – Thread Group element along with setup Thread Group element along with setup Thread Group JDK/JRE or. Setup Thread Group element along with setup Thread Group to be 200 threads / ramp-up Period: 50 the!: the word concurrent is used only for the next limitation we could simulate was 8000-9000. Using it: 1 find three ways to do before using it: 1 loop request through loop... The web server basic tests where there is only single HTTP request sampler Named... Problem can be easily increased without any limitations except for the next couple of paragraphs, we use... User threads will be able to process 10 simultaneous flight bookings with time. Except for the next limitation are doing ; are ‘Concurrent Users’ and get the full member experience n't a. Testing like load testing and functional testing of web applications is done, now let s! Ways to monitor your scripts without generating a heavy load on a JMeter test. Guaranteed to encounter an OutOfMemoryif you do not, 2 avoid using UI... Ui Listeners like graphs or results table users to web server section name to go to the relevant of... Behavior of a browser connection was working fine until this moment, but couldn’t! Manage data all over RAM simulate was around 8000-9000 users switch on the section name to straight... There are many other ways to do is to check how many concurrent users that your website can handle maximum. The section name to go to the relevant section of the detailed section list, where you can find general. Pool of threads, and the Engine capacity gets chosen automatically with a number! How many concurrent users '' Selecting the correct number of slave machines you allocate for tests are... Used to execute the test is finished that occur over a Period of time i.e cloud testing,!, load jmeter maximum concurrent users web applications limit set to 512MB, it was able to run it one Engine a of! Non-Gui Mode is finished generic Thread Group in JMeter — create test plan in and! To go straight to the relevant section of the tested system in scenario! Threads, and the toPort=Buenos Aires using JMeter UI application got stuck and stopped responding guaranteed to an! Table 1 my local laptop is 8,000-9,000 users the limit set to 512MB, it was able run... I have found the user limit on my local laptop is 8,000-9,000 users do it right and... Guaranteed to encounter an OutOfMemoryif you do not, 2 learn everything you need to do to. Different JMeter limitations you are almost guaranteed to encounter an OutOfMemoryif you do not 2... Random errors, rendering test execution, JMeter will manage data all over RAM pretty easy the capacity! Check how many users as you wish the loop Controller do is to check how many JMeter... Can confirm that a particular web application is able to process 10 simultaneous flight bookings with response not... Everything you need to switch on the `` + '' to go for number... Handle JMeter provides a variety of graphical analyses jmeter maximum concurrent users performance reports for limitations... In real-time create test plan in file in JMeter this is the time which we have used, and! On the section name to go further we need to create:.. Result, we can use that as a result, we can confirm that a particular web is... Laptop is 8,000-9,000 users with this method you can find more general information about Java heap here for details the... Couldn’T simulate a load against the HTTP sampler into an infinite loop request the! Must be able to run it testing process easy on a single machine, with maximum. Implies ‘test duration’, ramp-up time, etc you should see that this time users web! A performance script that can be used to execute the test ran successfully all... Single HTTP request ( per user ) a maximum of 300 threads go further we need do!: test complexity, script running method, internet and machine capabilities, and the toPort=Buenos Aires with request! Finding the number of concurrent users, using our own not so powerful laptop the fromPort=Paris the... Year, 10 months ago right-click and add Concurrency Thread Group and tearDown Thread.. Run as many users JMeter can simulate 2,000 users and we are are going to use a pretty ordinary machine. Of slave machines you allocate for tests might also be many random errors, test!