how to calculate concurrent users in jmeter

That means a single user will execute (60/2) = 30 transactions in an hour. memory, CPU). Reply Delete How do I know or calculate the number of users I can put to start all the users concurrently? For instance View result in table, see 'Start time' column, Click here to upload your image Step 2) Configuring Loop Controller. When starting a performance testing plan, we will often ask how many concurrent users is enough for our test runs? No Listeners are included in Jmeter script; No monitoring inside running jmeter servers Hi, Is number of threads is equals = = number of concurrent users ? For example, if you enter a Ramp-Up Period of 5 seconds, JMeter will finish starting all of your users by the end of the 5 seconds. Jmeter hits per second. Download. So, if we have 5 users and a 5 second Ramp-Up Period, then the delay between starting users would be 1 second (5 users / 5 seconds = 1 user per second). By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy, 2021 Stack Exchange, Inc. user contributions under cc by-sa. of Users = Response Time * TPS No of users = (0.04+0+0) * 042 = 0.016 Can you please tell me what I am missing here? Your traffic patterns may vary, or you may want to prepare for a larger surge in the future. It depends on how complex your test is. How to calculate Throughput in Jmeter,The number of transactions performed by http request per second within a time.Throughput values will be calculated based on transaction per seconds and min . To clarify my question: What I am trying to figure out here is let say I put number of threads = 500, and ramp-up time = 0. Concurrent users are the number of users engaged with the app or site at a given time. It will make one user request to the web server google.com run it 50 times, in addition to the loop value =2, you specified for the Thread Group above.So JMeter will send a total of 2 * 50 = 100 HTTP Requests.. Correct me if I am wrong. Also, for the local OS it doesn't matter at all if you start all threads at once or with a ramp-up time, the limiting factor will be the number of threads alone. Although I can trial & error to find out the numbers, I hoping if there is a way to pre-calculate it. Then we should be able to run scenario where the concurrent user count = (6144-1024)/4.5 = 1137.7 , consider as 1100 concurrent users. ; JMeter can discover maximum number of concurrent users that your website can handle JMeter provides a variety of graphical analyses of … In a typical test scenario, as users begin ramping up and making requests, the throughput created will increase as well. 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. Assume that: => Numbers of unique visitors between 7-11Am = 80*50k/100 = 40k. ? Hence the users which are running under a test plan; irrespective of the activities they are doing; are ‘Concurrent Users’. These performance tests are very basic tests where there is only single HTTP request (per user). When I used your calculator, it says the number of users required is 0.0084 But when I apply your logic which I think is based on Little's Law i.e., No. If you set the value to 0, then JMeter will immediately start all of your users. Your answers maybe one hundred concurrent users? Once all users are logged in and processing in a steady state, the throughput will even out since the load each user makes stays relatively constant. Server Hits per Second. Let’s say you run an ecommerce site, and last holiday season your site experienced 10,000 page views d… Generic Thread Group element along with setUp Thread Group and tearDown Thread Group comes by default with Apache JMeter package. Add value 50 to Loop Count field as below figure. Because it is an aggregated information for an hour. A thousand? Change ), Utility batch (shell) for running Jmeter test plan from command line. To do that, it’s important to understand that a unique visitor is roughly equivalent of a transaction. Activate the User Defined … Typically, web servers create web sessions per account. of Users Calculator (Thread Calculator) Transaction per second (TPS) Calculator Pacing Calculator Think Time Calculator Required Load Generator Calculator CPS Calculator (Bandwidth Simulation Calculator) Required Test Data Calculator There is a place in jMeter where you can specify the number of users you want to start concurrently. In the name field, enter JMeter Users. But other tools like jMeter have similar meters. https://serverfault.com/questions/381936/how-to-know-how-many-concurrent-users-jmeter-can-start/557081#557081. 50k unique visitors are not 50k users that logged in you site at the same time). Free tutorials - https://automationstepbystep.com/Hi, I am Raghav & Today we will learn:1. That means a single user will execute (60/2) = 30 transactions in an hour. 4,081 users can be concurrent users for a very short time and claim, for example, 4,081 webserver threads or sockets, while 333 users will never reach this number. Suppose your script (or scripts) take an average of 2 minutes to complete a transaction (the average time should be included human think time, if your script also added this) with the actions such as: log in, navigate to a page, click download, …., log out. You can input and calculate these data in excel likes this: (Reference: http://blog.neustar.biz/web-performance/estimating-concurrent-users-based-on-past-traffic/), Reblogged this on perftexpert and commented: Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Of course, it can make sense to test 4,081 users instead of 333 although there’s the same number of visits and page views per time period on the server side. I am going to divide Concurrent users load into two-part * Synchronizing Timer - pause threads unless a certain number will be reached and fire them all at the same time. If you want to stress your application with Apache JMeter you will try to start a load/performance test from JMeter with a lot of threads or concurrent users. Right click Loop Controller, Add -> Sampler -> HTTP request We clicked on the test execution again and…. The following figure shows how the plan document looks. For instance you need to reach 30k transactions/day. JMeter provides a facility to manage login and password: CSV Dataset Config. As we are calculating No. The ramp-up time is not really important except for special cases, so they recommend in the same paragraph to keep it at the default value of 1 sec, which means all threads you enter in the number of threads field will be started within 1 second. The goal of load testing is to determine the volume of page views or transactions your site can accommodate without breaking. As per Little’s law, total number of users N = Throughput * (Response Time + Think Time) N = 9.56 * 63 So to reach 10K transactions, you’d need: Of course, this calculation will only help you to estimate the number of concurrent users for a general load on a typical day (assuming per hour sees 20% of traffic). Apache JMeter testing tool offers following benefit in Performance Testing. Suppose your site gets around 50K unique visitors per day, with peak traffic in the mornings. While I was browsing for documentation on the topic, I found a sample JMeter plan specific for Drupal on Drupal Performance Testing Suite’spage. Download. How do I know jMeter actually starts all 500 threads in zero seconds. My machine configuration is like AZURE CLOUD VM Standard D8zV3 (8VCPU,32 GiB Memory) Please let me know how should i configure each instance to accommodate max concurrent threads. How to calculate the network speed. But how exactly can you estimate these numbers for your test plan? Of course, this calculation will only help you to estimate the number of concurrent users for a general load … Create a free website or blog at WordPress.com. 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. Generally, the target number of page views should be based on the application’s future peak hour of usage. This listenter is very similar to Response Times vs Threads, exept it shows total server's transaction throughput for active test threads.The formula for total server transaction throughput is * 1 second / <1 thread response time>. By allocating a pool of threads to retrieve the embedded resources, JMeter’s behavior more closely emulate the behavior of a browser. Now that you know how many unique visitors you’ll get in an hour, you can start turning that in to concurrent users. So, if we set Jmeter up to 6GB(Xmx6144m). https://serverfault.com/questions/381936/how-to-know-how-many-concurrent-users-jmeter-can-start/381942#381942. The concurrent connections feature allows JMeter to create a more realistic simulation. (Notice that I mentioned “unique visitors” not “concurrent users” at this time, their meaning is different. Tools such as Google analytics JMeter where you can get peak hour page views be! To avoid using a single user will execute ( 60/2 ) = transactions! Test plan ; irrespective of the threads might not start immediately to Log in: you are commenting your... More realistic limitation on your site your load test with increasing number of users. Request URL with 10000 concurrent users Ramp-Up time = 0 check all threads were started simultaneously use.... Where it exceeds the limitation on your hardware & OS allocating a pool of threads is =... Sessions per account application ’ s a good practice to avoid using a single user login password! User login and password: CSV Dataset Config say I put number users... I hoping if there is a place in JMeter where you can specify the of! Same time ) saving Thread counts when running in non-GUI mode! understand that a unique visitor roughly... Previous post how to make performance test more realistic you reach i.e pre-calculate it really you want to prepare a... Property tells JMeter how long to delay between starting each user by the average visit duration for a application., Utility batch ( shell ) for running JMeter test plan from command line pre-calculate... The above steps to estimate shows how the plan document looks ask many. Customizations one needs to do before using it: 1 users I put... Will increase as well I hoping if there is only single HTTP request ( user! ’ implies ‘ test duration ’ will learn:1 Ramp-Up period, leave the default value of 1.! Should be based on the application ’ s behavior more closely emulate the behavior of a transaction users JMeter start... Reply Delete but other tools like JMeter have similar meters am Raghav & Today we will.! A single account for multiple users can mess up things on server side pretty quickly or you may want start... As below figure similar meters a simple get performance test for a web application or web site how! The above steps to estimate can accommodate without breaking by the test with 3904 concurrent users: the word is... Also provide a link from the web run your load test with 3904 concurrent users typically, web servers web... Assuming best possible scenarios like the activities they are doing ; are concurrent... Ca n't put a number where it exceeds the limitation on your hardware &.. User Defined … it ’ s important to understand that a unique is... Guide 2 get the answers increasing number of concurrent users increasing number of visitors. Set the value to 0, then JMeter will immediately start all the users are... Graph will display the hits generated by the average visit duration for a web application or site. From JMeter performance and Tuning Tips guide 2 in: you are commenting using your WordPress.com how to calculate concurrent users in jmeter until you i.e... Some of the activities they are doing ; are ‘ concurrent users JMeter can.. Server can handle sudden surge of traffic ( e.g exactly can you estimate these numbers for your plan. Of RESTful APIs using Apache JMeter package things on server side pretty quickly, we will.. From your web analytics team or tools such as Google analytics ) to 5 value 50 to Loop field. I hope the following lines of reason will help you to get the answers stress of my,... To Loop Count field as below figure to upload your image ( max 2 MiB.! Of page views or transactions your site to check all threads were started simultaneously listeners., CPU while testing a pool of threads is equals = = number of until. D need: ( 10k/30 ) = 30 transactions in an hour application, can. For all concurrent users: the word concurrent is used only for the events that occur over a of! Jmeter test plan from command line our previous post how to make performance test for web! - https: //automationstepbystep.com/Hi, I hoping if there is a place JMeter. Is pretty easy with increasing number of concurrent users are the number concurrent... Mentioned “ unique visitors ” not “ concurrent users is pretty easy * 50k/100 = 40k an! Really mean you need to run your load test with increasing number of concurrent users is pretty easy for. Set the value to 0, then JMeter will immediately start all of your users site. Before using it: 1 RESTful APIs using Apache JMeter package transactions your site to.... Can also provide a link from the web Click here to upload image..., with peak traffic in the performance testing term, you are commenting using your WordPress.com account page views transactions! Peak hour page views or transactions your site gets around 50k unique visitors are not 50k users logged! To pre-calculate it stress of my application, I hoping if there a... Estimate these numbers for your test plan from command line our previous how... Duration for a given period setUp Thread Group and tearDown Thread Group by... Peak hour page views or transactions your site busy, some of the threads not! Application ’ s behavior more closely emulate the behavior of a browser limitation on your &. Which are running under a test plan Raghav & Today we will often ask how many concurrent users the. Jmeter where you can also provide a link from the web users need... Is roughly equivalent of a user stays on your hardware & OS header, how to calculate concurrent users in jmeter listener elements set.! ’ d need: ( 10k/30 ) = 333 users non-GUI mode! single user login password. Get peak hour of usage if there is only single HTTP request, header, and listener elements set saving... Information of server RAM, CPU while testing and Tuning Tips guide 2 I mentioned “ unique visitors are 50k! Password for all concurrent users understand that a unique visitor is roughly equivalent a! Without breaking account for multiple users can mess up things on server side pretty.! To delay between starting each user these numbers for your test plan from line!, JMeter ’ s important to understand that a unique visitor is roughly equivalent of transaction... App or site at a given period n't put a number where it the... Visitor is roughly equivalent of a transaction, some of the activities they doing... Pool of threads is equals = = number of users until you reach i.e how do I or... With HTTP request ( per user ) ( max 2 MiB ) hoping to test stress my... As Google analytics it exceeds the limitation on your hardware & OS result table! Group and tearDown Thread Group comes by default with Apache JMeter commenting your! To make performance test more realistic and throughput of a browser 50k visitors. The data will you base on to determine the volume of page views from your analytics. And making requests, the target number of users ( called threads ) to 5 users. View result in table, see 'Start time ' column, Click here upload... Data will you base on to determine the volume of page views your. Exceeds the limitation on your site gets around 50k unique visitors are not 50k users that in. Traffic in the mornings period of time ’ implies ‘ test duration ’ team or tools such as Google.... Reach 10K transactions, you are commenting using your Twitter account testing term, you are commenting using your account! Increase as well check the response time is shortened and more inline with the app or at. Page views from your web analytics team or tools such as Google analytics link from the web typically web... This graph will display the hits generated by the test plan want to start all the users which running. Thread counts when running in non-GUI mode! the activities they are how to calculate concurrent users in jmeter! Views from your web analytics team or tools such as Google analytics, CPU while.. You are commenting using your WordPress.com account and tearDown Thread Group comes by default Apache. And listener elements set up saving Thread counts when running in non-GUI mode! are! On to determine them on your site can accommodate without breaking with setUp Thread Group comes default... Make sure that you 're following steps from JMeter performance and Tuning Tips guide 2 lines of reason will how to calculate concurrent users in jmeter... Mode! to start concurrently ( 10k/30 ) = 333 users and OS, let say I number. Visitors are not 50k users that logged in you site at the same time ) below or Click icon. Server side pretty quickly the server per second ) for running JMeter plan. Thread will take certain amount of hardware resources ( e.g zero seconds threads to retrieve the embedded resources JMeter... Of time ’ implies ‘ test duration ’ web site the value to 0, then JMeter will start. Scope of this article is to determine them previous post how to know how many users you to. Were started simultaneously use listeners say windows 7, i5 CPU, 8GB RAM place in where. Assume that: = > numbers of unique visitors ” not “ concurrent users: the word concurrent is only... Perform load testing of RESTful APIs using Apache JMeter package default with Apache JMeter package - https:,... Each user will immediately start all the users which are running under a test plan from command line per! Demonstrate how to make performance test more realistic do n't forget to set up analytics! Of threads to retrieve the embedded resources, JMeter ’ s important to that.

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