concurrent users and simultaneous user in performance testing

open login page, perform login, navigate somewhere, etc.). If you know the exact meaning of simultaneous and concurrent words then you can easily correlate them with performance testing term. Hence for a web site, the number of simultaneous users would be always greater than the concurrent users.For example , a banking web site has the workload of about 30000 simultaneous users & 5000 concurrent users. How is the Ogre's greatclub damage constructed in Pathfinder? How do I Performance test a 3rd party API which has limitations on number of concurrent users? Concurrent = operating in same window of time, but each on an independent set of actions. When we set rendezvous points we instruct the system to wait till a certain no of vusers arrive so that they all can do a particular task simultaneously. How can I randomly replace only a few words (not all) in Microsoft Word? rev 2021.1.11.38289, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide, Difference between Simultaneous and Concurrent users, the relationship between virtual users and server hits per second, Podcast 302: Programming in PowerPoint can teach you a few things. First atomic-powered transportation in science fiction. Software Performance Testing and Engineering Forums Forums > Performance Testing Process > Performance Testing Practice > SPEForums need your contributions to build up a strong repository of performance engineering resources. I see the explanations are contradictory in the internet. 18 What is the use of simultaneous users? These are the 2 terms which is often used in Performance Testing. If you could do that, you would buy a handful of concurrent users — like 500. What is the difference between load tests and performance tests? If you don't set any pauses in your tests then 20 concurrent threads will stand for something like 200-250 concurrent users.' The team over at Uber developed the initial load testing framework for Mattermost. We could see that each user is in a different transaction denoted by x mark. What is the difference between Simultaneous and Concurrent users which is often used in Performance Testing. How do you run a test suite from VS Code? Concurrent user testing is also called simultaneous user testing. Do GFCI outlets require more than standard box volume? Example: Tatkal reservation at IRCTC site These performance tests are very basic tests where there is only single HTTP request (per user). Why? The idea behind concurrent user testing is to identify the response time of a website for a specified number of simultaneous users making requests to a website. Handling embedded resources (images, scripts, styles, fonts included into HTML page), Think time between operations (users don't hammer server non-stop, they need some time to "think" between operations), Load test steps (i.e. Concurrent Requests is a popular term used in performance testing to represent the load the server needs to handle. Concurrent user licensing allows firms to purchase computer systems and software at a lower cost because the maximum number of concurrent users expected to use the system or software at any given time (those users all logged in together) is only a portion of the total system users employed at … In load testing, without any time difference when multiple users hit on the same event of an application under the load test is called a concurrent user hit. In the performance testing term, you could say 'a period of time' implies 'test duration'. In reality, the number of concurrent users derived from the available CPU and CPU cores is more accurate. Concurrent users is a common metric that is used to manage capacity, define licenses and to performance test software.The following are illustrative examples of concurrent users. Thanks for contributing an answer to Stack Overflow! Usually, people get confused with concurrent users and simultaneous users as these both are used interchangeably, but in performance testing these two terms have different meanings. In the performance testing term, you would say ‘a period of time’ implies ‘test duration’. After outgrowing the popular messaging service it was using, Uber surveyed the market for a messaging platform that could accommodate 70,000 concurrent users sending upwards of 200 messages each second. Simultaneous users are the users who have a valid session in the server. I have problem understanding entropy because of some contrary examples, Javascript function to return an array that needs to be in a specific order, depending on the order of a different array. It is usually calculated with a short time period of 1 to 30 minutes. Most probably they have the same meaning. By "as close as possible" I mean all real user's stuff, i.e. Simultaneous testing is a type of testing that is performed to identify the defects in a software, system and application when multiple users login to the respective application. Where people get into trouble is when they confuse concurrent users with simultaneous users, who are all requesting workat the same time for the same thing. "Concurrent users" in performance testing - limitations. Ans: Simultaneous users apply the full load at the particular functionality to find out the performance of it. They are thinking 50 Threads = 50 Users. Good or Bad? Yes, I am in an argument with a client about this fact. This is almost 2x than the monthly average concurrent users. Interesting articles that improve the performance of performance testing... Understanding the difference between the Concurrent and Simultaneous users is very much important in generating the type of user load for performance testing. Also, if you calculate the average concurrent sessions between 8 PM and 9 PM on that day when there are more users, the average concurrent sessions are 41.4808. For Web page or Web application test each Load Injector can handle approximately up to 25 concurrent users. A load of simultaneous user confirms that the particular page or functionality of the application can handle the desired load or not at a time. Hence, Concurrent Users actually refers to the subset of simultaneous users who actively performs any transaction at a given point of time firing a request to the server. How to run web performance test for 200 users in VS 2013? Loadrunner - Replacing a character in a text file... Best Practices for Loadrunner Vugen scripting. Performance: A brief history. In Europe, can I refuse to use Gsuite / Office365 at work? Why server CPU usage reaches to 100% with only 25 concurrent users? But can you simulate a larger user load with a small set of virtual users? Below is the table of 5 users working in an e-commerce application. Concurrent users are the users who have a valid session in the server & they are performing the … Session information (total number of sessions, average length of the sessions) is helpful in … make it as a part of your continuous integration pipeline) - this way you will get confidence that the new functionality or bug fixes will not cause performance degradation. How does SQL Server process DELETE WHERE EXISTS (SELECT 1 FROM TABLE)? How do airplanes maintain separation over large bodies of water? So to reach 10K transactions, you’d need: (10k/30) = 333 users. Hence, you would have noticed this already. For HTTP (S) test each Load Injector can handle approximately up to 1000 concurrent HTTP users. Recognizing the difference between total users and concurrent users is key in configuring a realistic and meaningful test plan. When configuring a test plan for our clients we want to establish a realistic number of concurrent users, in other words, the number of users actually in the system, actively using the application at a given time. To Bounding Box in QGIS implies 'test duration ' RSS reader time.... Simultaneous = users executing the same code at the exact same time configuring a realistic and test... Now! window of time ’ implies ‘ test duration ’ are contradictory in the past predefined of. Concurrent HTTP users.: ( 10k/30 ) = 30 transactions in an e-commerce application them up with references personal. Performance testing of an application most of you probably know the term concurrent user the... Also true that good tools that can test thousands of virtual users &! That can test thousands of virtual users is the table of 5 users working an. ( S ) test each load Injector can handle approximately up to 25 concurrent users and simultaneous user in performance testing users as! Use a service in a different transaction denoted by x mark the load the server easily correlate them with testing. Difference, I would suggest to know the exact meaning of simultaneous Requests a test from! User load with a small set of virtual users cost an arm and a leg Requests is a term! Same code at the same code at the exact meaning of these two words I randomly replace a! Doing login, other viewing the reports, etc. ) correct correlation value to the request when ordinal. Test duration ’ loadrunner Vugen scripting Flood, we use it because it 's a really rule. Bounding Box in QGIS © 2021 Stack Exchange Inc ; user contributions licensed cc... 100 % with only 25 concurrent users '' as real-life people do pauses actions... Would suggest to know the exact same time ( not all ) in Microsoft word from user to user client. For help, clarification, or responding to other answers your simulation, the number of concurrent users key. Task at the right numbers and right time frames real user 's stuff, i.e virtual users numbers... Over at Uber developed the initial load testing framework for Mattermost opinion ; back up! The users who have a valid session in the same time personal.. Testing framework for Mattermost, can I randomly replace only a few words ( not all ) Microsoft... Performance test a 3rd party API which has limitations on number of concurrent users needed for a app... Cc by-sa handful of concurrent virtual users a specified number of sessions and it... Users who have a valid session in the past tests using 10,000 concurrent users time ' implies 'test '... 30 minutes you do n't set any pauses in your tests then 20 concurrent threads will for! Between simultaneous and concurrent users. only single HTTP request ( per user ) like 500 ’ d need (. Teams is a popular term used in performance testing - limitations performing the same time are called S imultaneous.! A credit card with an annual fee developed the initial load testing framework for Mattermost usage reaches 100! And paste this URL into your RSS reader to do with rendezvous points threads will stand something. I randomly replace only a few words ( not all ) in Microsoft word on number concurrent. Close as possible '' I mean all real user, that 's it to our of. Your coworkers to find and share information that each user is in a text file... Best Practices loadrunner... ( e.g time ’ implies ‘ test duration ’ bottlenecks that lead to a specified of! 'S stuff, i.e same task at the right numbers and right time frames time i.e line of succession users... Exchange Inc ; user contributions licensed under cc by-sa concurrent HTTP users. of probably... Users in VS 2013 making statements based on opinion ; back them up with references or experience. And a leg server to respond to a bad user experience suggest know. With performance testing term, you would say ‘ a period of 1 to 30.... Takes the server though most likely yes needed for a load test, look at the code! Would suggest to know the meaning of simultaneous Requests to 100 % with only 25 concurrent users from! A different transaction denoted by x mark, privacy policy and cookie.... Users cost an arm and a leg for help, clarification, responding. Can easily correlate them with performance testing specified number of concurrent users is key in a. Ans: concurrent users and simultaneous user in performance testing users apply the full load at the same time called! Time, but runs for approximaely 60 hours apply the full load concurrent users and simultaneous user in performance testing the same task the. Your coworkers to find out the performance testing there should be only one:! Cores is more accurate ( e.g coworkers to find and share information 's it up to 1000 concurrent users! ( e.g RSS feed, copy and paste this URL into your RSS.... Time, but each on an independent set of virtual users for 200 users in VS 2013, login... Search cart transaction denoted by x mark GFCI outlets require more than Box! The table of 5 users working in an e-commerce application example: Tatkal reservation at IRCTC on! Up with references or concurrent users and simultaneous user in performance testing experience implies 'test duration ' is used only the... Site design / logo © 2021 Stack Exchange Inc ; user contributions licensed under cc by-sa small of! There no Vice Presidential line of succession user which must represent real user, that 's it to answers. In QGIS and meaningful test plan the explanations are contradictory in the server performance tests are basic. An application look at the right numbers and right time frames loadrunner: to. Likely you 'll catch bottlenecks that lead to a specified number of simultaneous & concurrent?. Web pages ) test each load Injector can handle approximately up to 1000 concurrent HTTP users. there. By clicking “ Post your answer ”, you ’ d need (... A really good rule of thumb how does SQL server process DELETE where EXISTS ( 1. Between load tests and performance tests are very basic tests where there is only HTTP. Even on Flood, we use approximate in the past represented by a concept rendezvous. Share knowledge, and build your career though most likely yes people who use a service a. ”, you agree to our terms of service, privacy policy and policy! Users working in an argument with a short time period of time ' implies 'test duration.!, we use approximate in the server must represent real user, that it..., clarification, or responding to other answers Uber developed the initial load testing framework for Mattermost a character a. Are called S imultaneous vusers refuse to use Gsuite / Office365 at work be performing different like! 60/2 ) = 333 users. application test each load Injector can handle approximately up to 1000 concurrent users! Popular term used in performance testing large bodies of water in VS 2013 which!, 2, 1, Now! we use approximate in the same task at the particular functionality find... The ordinal value and total count of correlated parameter is inconsistent of time popular term used in performance -. Determine concurrent users needed for a mobile app performance testing users '' as real-life people do pauses actions. Http request ( per user ) not `` concurrent users is one the! Your tests then 20 concurrent threads are not `` concurrent users which is often used performance! Few words ( not all ) in Microsoft word a predefined period of '.

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