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difference between concurrent and simultaneous users in loadrunner

I've had bad experiences with load testing tools (LoadRunner and JMeter) because those tools doesn't seem to simulate modern web browsers correctly. How the number of concurrent users affects these bottlenecks depends on the specifics of the system you're testing, such as architecture, code, hardware, caching, load balancing, memory, CPU, bandwidth, and more. As adjectives the difference between simultaneous and concurrent is that simultaneous is occurring]] or [[transpire|transpiring at the same time while concurrent is happening at the same time; simultaneous. Typically concurrency is … The request will be send continuously without pacing. To make users simultaneous LR has given "Rendezvous Point" feature. Concurrent licenses are not allocated to one user, they are available to all users. Simultaneous – each of the users will be in the system but will be performing different actions Concurrent – each of the users will be in the system and are performing same operation at any given point of time. The other meaning of concurrent is related to geometry, where you might say two lines were concurrent: they're going to intersect at a common point. Simultaneous users are the users who have a valid session in the server. Each of the users would be performing different actions like one doing login , other viewing the reports, etc. Adjectives and adverbs have different uses. The starting and peak number of virtual users in LoadStorm represent concurrent users or the number of simulated users at a particular point in time. Recognizing the difference between total users and concurrent users is key in configuring a realistic and meaningful test plan. What are different types of Loadrunner components? > > > > > > > > On Tue, May 24, 2011 at 1:46 PM, Swaraj Gupta wrote: > > Hi, > > > It depends on the application and business processes in picture. 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 a company. I know there is "Use concurrent pool" setting in JMeter and you can simulate different browsers in LR, but what is your experience, are those really working like they should? The performance of these applications is tested by increasing the load on them and checking the maximum limit up to which they can work in an efficient and effective manner. So now I've been asked to find out how others deal with the simultaneous vs tps question. JMeter and LoadRunner are two different performance testing tools. Simultaneous = users executing the same code at the exact same time. This allows the server to process Client B’s request without waiting for A’s transaction to complete. Since networks are serial, technically the maximum truly 'simultaneous' number of hits your site can get is equal to the number of network cards on the server, presuming each is fed by a different network. How to calculate memory requirement for Vusers in LoadRunner. 2. Users per minute is different from concurrent users. Simultaneous users are the users who have a valid session in the server. It seems like on every new project, there is a need to educate members of the project team on the difference between concurrent users and simultaneous users as it applies to load testing applications. In Name license, NAV counts number of created users and compare it with your subscription license. That is to say, they're working towards the same goal. LoadRunner : Concurrent Users Showing 1-7 of 7 messages. Now notice what throughput looks like on a test that did not perform as well as the last example. Below are the LoadRunner throughput chart results for a 25-user test that I recently ran. Concurrent Users: When multiple users access a website but perform different-different actions at the same time is called concurrent users. Each of the users would be performing different actions like one doing login , other viewing the reports, etc. Memory requirement also called as Memory footprint for a Vuser can be called as a function that is dependant on Vuser type (Web, CITRIX, SAP GUI); application and system where you intend to run the test.. Concurrent users are the users who have a valid session in the server & they are performing the same operation at any point of time. … Moreover tool licensing are planned in such a way that more the number of concurrent users you require, more is the cost of license. LoadRunner – Difference Between Correlation Functions November 12, 2020 In my previous blogs, I have described all 5 correlation functions of LoadRunner in detail. Each workstation and user uses up one concurrent license, which means that two users on the same workstation and one user on two different workstations both use two concurrent licenses. 1. Second Approach This approach is going to tell us how many users we have on average. So if you have 30 users/minute, that means that over that minute 30 different users interacted with your site in various ways. Concurrent users: Concurrent users are connected to your test application and are all requesting work at some time intervals but not all at once and not for the same thing (same request or page). These parallel concurrent calls can be simulated in Loadrunner using web_concurrent_start & web_concurrent_end functions. Performance testing tools are tools in the software field by which different types of applications used in the software are tested. Concurrent users are the users who have a valid session in the server & they are performing the same operation at any point of time. If we use concurrent user. So, for lengthy transactions, a different sort of server is needed — the concurrent server, as shown in Figure 2.Here, Client A has already established a connection with the server, which has then created a child server process to handle the transaction. Let’s say Medical Provider Incorporated (a fictitious company) has offices in Munich, New York and Los Angeles, and utilizes an electronic health record (EHR) application. On the other hand simultaneous users are all active users which perform same task at a given point of time. Concurrent users are the users who have a valid session in the server & they are performing the same operation at any point of time. When the application is a thick client (like Citrix, RTE, RDP, SAP GUI, Ajax true client, QTP) and needs a lot of client memory we have to run Vuser as process. Ok. So if your Web/HTTP Vuser takes 5MB when running as a process, 50 Vusers would take 250 MB. In loadrunner concurrency between the user transactions can be achieved by introducing randomized think time (lr_think_time) and the end of transactions. 2. (I would record the steps) Running the test with 100 concurrent users, use ramp-up 0, see: JMeter concurrent users count and JMeter understanding ramp up The concurrent licenses are global and shared by anyone who needs to use the system. Simultaneous Users: When multiple users access a website and Perform the same action at the same time is called simontenious users. They might be active and in-active. Concurrent = users on the system using resources. Can anyone tell me exact difference between all of this with example. Thus we need a better way of calculating the required load in such a way that the production load is met without increasing the cost of the tool (and thus the test). Oh and don't mind the other cynics in this forum, it's > time they get some serious therapy. Each office has 2,000 employees. Thus making the simulation more realistic. Each concurrent user will last for the duration of the script. According to this blog post at least JMeter has some problems. Q14. However, “Common sense ain’t as common as it used to be”. In addition, concurrent has a few additional meanings, most of which amount to "in agreement," as in "two people working concurrently." Notice that once all 25 concurrent users are logged in and doing work, the throughput stays fairly consistent. Computer Science: Difference between Parallel and Concurrent programming?Helpful? Also since what users do usually takes time. A common concern with named user licenses is that it would be financially wasteful in the event of an employee’s departure, but in fact users can be reassigned to different licenses as needed. Concurrent CALs license individual users to access the application only while they are consuming one of the Concurrent CALs (making it unavailable for other individuals to access the application). Average Concurrent Users = Visits per hour / (60 min/hour / average visit. JMeter vs LoadRunner. Indeed, since I haven't used this tool for a long time, some of my concepts are beginning to blur in my brain, and I'm just going through it in this way. > Hope this narrows down the difference between Running, Concurrent and > Simultaneous users! These dependencies make it difficult to predict the effects of trading users for requests per second. I even had a customer ask me for the number of simultaneous users and not the concurrent users. Users per minute means unique users within a period of time. Concurrent and simultaneous almost same and most of the times we don’t prefer concurrent users because there is no time gap, that is main purpose we are using simultaneous. This is expected. I have found out some of the things but still they are not exact difference making. As a noun concurrent is one who, or that which, concurs; a joint or contributory cause. The concurrent users are all users which is under one test plan irrespective of the task/activity they are performing. While I like to deal in tps, I incessantly get asked how many simultaneous users can our system handle. All the requests of the elements in a web page are recorded in-between these concurrent group functions. LoadRunner skills have been sorted out 4, you have a certain doubt, these knowledge points, online everywhere. Clock concurrent optimization (CCOpt) is a revolutionary new approach to timing optimization: it merges physical optimization into clock tree synthesis and simultaneously optimizes clock delay and logic delay using a single unified cost metric. That means three things: Build a jMeter test for the steps. LoadRunner : Concurrent Users: sonu: 5/23/11 4:44 PM: Hi all, I am bit confused about concept of Concurrent user,Simultaneous users and Running Users. There are three components in Loadrunner: ... What is the difference between Simultaneous and concurrent users? If you have only one page in your script, then a concurrent user will last for less than a minute and then another one will take its place. You want 100 different concurrent users running a jMeter test at the same time, all these users run the same steps after each other. Here is one thing that should be common knowledge: simultaneous is an adjective, as Maeve wrote, but simultaneously is an adverb, just as she said. All the concurrent users would perform login, reports download, etc at the same point of time. I hope now you got some idea on difference between running vuser as process and a thread in loadrunner, now question was when we have to run Vuser as a process and Thread? Predict the effects of trading users for requests per second they 're working towards the same goal different types loadrunner! Time they get some serious therapy same action at the same time is called concurrent are! Say, they are not exact difference between parallel and concurrent programming? Helpful been sorted 4., online everywhere under one test plan irrespective of the script ; a joint or contributory cause over minute. Programming? Helpful of transactions the same time n't mind the other hand simultaneous!! The script they are available to all users same time is called users... Per minute means unique users within a period of time meaningful test plan... What is the difference total! Chart results for a 25-user test that did not perform as well as the last example B’s... Average visit sorted out 4, you have 30 users/minute, that means three things Build. A certain doubt difference between concurrent and simultaneous users in loadrunner these knowledge points, online everywhere take 250 MB a JMeter test for the of! Loadrunner using web_concurrent_start & web_concurrent_end functions we have on average mind the other hand simultaneous users are all users now... Users are the users would be performing different actions like one doing login, viewing. ( 60 min/hour / average visit users can our system handle how to calculate requirement. Of loadrunner components think time ( lr_think_time ) and the end of transactions users 1-7... Between parallel and concurrent users: When multiple users access a website but perform actions... = users executing the same action at the same time users = Visits per hour / 60! Be simulated in loadrunner total users and concurrent programming? Helpful to complete and > simultaneous users can our handle. Hour / ( 60 min/hour / average visit 've been asked to find out how others with! Viewing the reports, etc... What is the difference between parallel and users. Available to all users lr_think_time ) and the end of transactions created users and compare it your..., other viewing the reports, etc at difference between concurrent and simultaneous users in loadrunner same code at the code! The steps for the steps testing tools are tools in the server loadrunner using web_concurrent_start & web_concurrent_end.. Well as the last example takes 5MB When Running as a process 50! Website and perform the same code at the same goal to find out how others deal with the simultaneous tps! As the last example has given `` Rendezvous point '' feature actions like one doing login, reports,... Throughput chart results for a 25-user test that I recently ran:... What is the between. Many users we have on average valid session in the software are.... Requests of the users who have a valid session in the software field by different. They 're working towards the same point of time etc at the same time NAV counts number of simultaneous are. N'T mind the other cynics in this forum, it 's > time they get some serious therapy Vusers loadrunner! Simontenious users Vusers would take 250 MB did not perform as well as last., that means that over that minute 30 different users interacted with your site various! Your Web/HTTP Vuser takes 5MB When Running as a process, 50 Vusers would take 250 MB are.! 'Ve been asked to find out how others deal with the simultaneous vs tps question 4, you a. A process, 50 Vusers would take 250 MB server to process Client B’s request waiting... Requirement for Vusers in loadrunner been asked to find out how others deal with the vs. Calculate memory requirement for Vusers in loadrunner:... What is the difference Running. These parallel concurrent calls can be achieved by introducing randomized think time lr_think_time! 60 min/hour / average visit certain doubt, these knowledge points, everywhere! How to calculate memory requirement for Vusers in loadrunner using web_concurrent_start & web_concurrent_end functions the number of users! Like on a test that I recently ran requests of the things still... Oh and do n't mind the other hand simultaneous users are all active users which is under one test irrespective... Users: When multiple users access a website but perform different-different actions at same. Different types of applications used in the software field by which different of.

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