Only these three scenarios offer infinite possibilities of variation already. It is usually calculated with a short time period of 1 to 30 minutes. If you want to measure the server side beyond the maximum “good” case, you don’t aim at the performance anymore but at the overload behavior. The number of page views stays the same since 1 visit equals 4 page views and the number of visits is constant. It used to be 40 seconds but today’s users are more experienced and user guidance has improved a lot so that they can navigate through a website much faster. In the context of load and performance testing, this metric is often claimed the measure of all things, accompanied by the mentioning of astronomically high numbers we can’t really verify and that sometimes are simply used as sales argument for overpriced software products. Can lead to further technical requests (HTML, CSS, Javascript, images etc.). Bulgarian / Български We also use analytics. When testing against a server, the single running of Browsing would be a visit consisting of 4 page views and possibly further requests for static content. The average think time currently amounts to something between 10-20 seconds, depending on the web presence. I'm trying to get distinct users by hour on a website using Logparser. You simply add capacity until you meet the requirements. Jena, Germany – Headquarters In the worst case, you can’t test at all now because each test run leads to a different result. Hello All, I am running a report CCUINIT to check for concurrent users on a day basis. Scenario: The course of a visit in terms of a use case (for example, to search something, to order something, or both). Requested content may be HTML, CSS, Javascript as well as images, videos, Flash, or Silverlight applications – HTTP can deliver almost everything. On the server side, both will result in the identical number of visits per time period, the identical number of page views, etc. Macedonian / македонски You can calculate concurrent users from Google Analytics account. What we want to emphasize here is that a temporal dimension is absolutely necessary. Think time: Time period between two page views of a visit. I have login date/time column A[.] Even if you keep the think time for 4,081 users at a constant level, the traffic wouldn’t be as synchronous as you planned it to be in the beginning. Chinese Traditional / 繁體中文 Portuguese/Portugal / Português/Portugal This way you can also test the overload behavior at the same time. Romanian / Română Select “Audience” from the sidebar menu. For example, if you run a load test with 10,000 virtual users, each making a request every 20 seconds (3 requests per minute), then you're making 30,000 requests … I have to come up with a concurrent user base for my app where there would be 3420 phone stores in total. Croatian / Hrvatski Then you focus on stability and a predictable way of “decline”. So this means 2000 concurrent users are there on the website. So what should be the user load that we can achive in LoadRunner scenario . We are Xceptance and we are dedicated experts for software testing. Therefore, if one user repeats their visits for one hour, he or she completes 3,600 seconds / (4 seconds per visit) = 900 visits / hour. How do we calculate number of concurrent users for a fresh eCommerce application which is not in production? By clicking Opt-Out, we will place a non-personalized cookie on your machine that indicates that you don‘t wish to be tracked. From this point of view, you’ll soon realize that the number of concurrent users can basically mean anything: much traffic, little traffic, little load, much load. Most users do not need to access a file server and most accesses will not be concurrent, although the shared folders will remain on their desktops. for a span of time. Greek / Ελληνικά Norwegian / Norsk Login to Google Analytics account. Italian / Italiano 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. To arrive at the number of logged in users, let’s say 95% of clerical users and 33% of query users are logged in at once, therefore: (1,500 x .95) = 1425; (500 x .33) = 165; Total logged in users = 1,590. Today’s article is meant to shed some light on the concurrent user metric and the misunderstandings and myths surrounding it. All tests that are normally run at first, which is absolutely correct, are tests that want to identify or verify the good case. Average Concurrent Users = Visits per hour / (60 min/hour / average visit) Visit Per Hour is 750. Accordingly, our visit duration is 49 sec. Korean / 한국어 Why is Thank you !! Provided an equal distribution and an average visit duration of 49 sec, 300,000 users per hour that are often identified with visits (business-wise) in most cases, would result in the following: a user completes 3,600 / 49 sec visit duration = 73.5 visits per hour so that you end up with 300,000 / 73.5 = 4,081 concurrent visits aka real concurrent users at any given second. tl;dr — This post is about using Google Analytics to determine how many concurrent users to specify in your load tests. Let’s assume a think time of 15 sec for our example. This is where coincidence comes into play. That means you need to define target numbers you want to support, or measure what the server is currently able to deliver. How to determine concurrent user counts from apache logs. Average Visit is 1.6 Min (The amount of time user will spend to access the use case) Thus Average Concurrent User comes around 20. Slovenian / Slovenščina You'd need to sort the file by %t then go through each record working out the overlap. Constant Arrival Rate: Users arrive as new visitors regardless of what is happening on the server side. Just look at the user here as the load test execution engine repeating that independently of other “users”. Number of virtual users = 10 * 10 * 3600 / 600 = 600 Hence the above formula gives a user count of 600 users. Concurrent Users: The word concurrent is used only for the events that occur over a period of time i.e. Both of our visitors execute 4 page views each, thus resulting in a total of 8 page views. Each store will have 4 users which constitute to 13680 total users. Most of the time, we consider a scenario an isolated visit repeating the steps of the test case and thus using defined data (note that also random data is defined data). Vietnamese / Tiếng Việt. Search in IBM Knowledge Center. In this article, we will provide a list of the top 7 Wi-Fi access points supported by Tanaza to connect the largest possible number of concurrent users under heavy data traffic usage. 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. A visit would now take (4 page views each takes 1 sec) + (3 think times each 15 sec). German / Deutsch 2007-04-02 1:00 121. Chinese Simplified / 简体中文 (total monthly users)/ (30 days a month * 15 hours a day * 4 {note, 60min/15min per user} = daily average concurrent user load. It’s only 3 think times because there’s none after the last click that terminates the visit. The arithmetic mean would still be 15 sec. Concurrent user licensing is often much more affordable than total/named user licensing, especially when users only need to access to the system once in a while. Why do different suppliers price software licenses in different ways? Are these four users per store per 8 hours and they come in at any time? Are you confused about the difference between named users and concurrent users? In terms of page views without think times this means: 300,000 users are 1,200,000 page views (for our example above). Since the requirement of 100 concurrent users is actually never bound to a certain period, you therefore have to assume that these users could potentially click at any time. by Donald Lee. Actually i have been told to calculate concurrent users day. I don't have any idea that which is best way to calculate concurrent logins per day (i.e claculating hourly concurrent logins per day and then averaging or calculating Max no of concurrent logins in any hour.) There is no methodical way. I am trying to calculate the number of concurrent user for each hour. +49-3641-55944-0. Representation of test cases meant to be run as load tests. Russian / Русский So we’ll apply some statistical logic to arrive at a realistic number of concurrent users for a peak load test. As soon as you say you have a number of x visits that could vary in their duration, you end up with a higher maximum number of visits you need to support but that you actually don’t want to test. If you want 100 concurrent users during the load test duration, it seems you have already known it as you mentioned above, like achieve user load to 1000. "Hourly Sessions x Average Session Duration (in seconds) / 3,600" is the formula we recommend to get started. For more information please read our privacy section. +49-3641-376300 Hebrew / עברית Concurrent User: We don’t exactly know about them yet…. You can do it using HTTP Request Defaults Edwer Fang [MSFT] MSDN Subscriber Support in Forum If you have any feedback on our support, please contact msdnmg @ microsoft.com Please remember to mark the replies as answers if they help and unmark them if they provide no help. French / Français Swedish / Svenska 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. If the system delivers what it should, the test may expand in its width aka both the think times and the number of concurrent users go up. Kazakh / Қазақша If the server can handle the load, the system runs stable and you just need your user number x (according to our calculation, 4,081, for example). Concurrent Calculator Concurrent Service is used to identify a member who has two contracts with one employer. You can calculated concurrent users with the following formula. 4,081 concurrent visits produce 4 page views in 49 sec (visit duration) each, that is in 49 sec we have 16,324 page views, thus 333 page views per sec (see next paragraph). Ask Question Asked 9 years, 11 months ago. Serbian / srpski Oh, and needless to say that 42 is always a good number of concurrent users… ;-). Provided an equal distribution and an average visit duration of 49 sec, 300,000 users per hour that are often identified with visits (business-wise) in most cases, would result in the following: a user completes 3,600 / 49 sec visit duration = 73.5 visits per hour so that you end up with 300,000 / 73.5 = 4,081 concurrent visits aka real concurrent users at any given second. So lets say a max of 25000 users concurrently are on your server, then user 25001 tries to access site he would reach server busy message. This is a limit at any one time at once. We know the total user base (1,20,0000 users) and number of users who will access the application in an hour say 10,000 users in an hour. Now, you may want to argue that they aren’t coming simultaneously. I have about 170 users and am preparing to move from a workgroup environment to a DC/AD environment. Click the “Reporting” tab. Two concurrent visitors result in 1,800 visits in total leading to an overall total of 1,800 visits x (4 page views per visit) = 7,200 page views. Suppose we have 1000 users in application but we are interested in concurrent users. 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. Visit: In general, a visit occurs when you send a request to a server and, as a response, the website you requested is displayed. God bless, https://perfmatrix.blogspot.in/2016/11/no-of-usersthread-calculator.html. Steady Load: Runs a fixed number of users that wait for the server, for instance, when it has long response times. Polish / polski When I try to do "SELECT date, QUANTIZE(time,3600) AS hour, DISTINCT cs-username it bombs. The exact same traffic? So now with how many concurrent users … So for me to guess the concurrent users on a peak hr, am doing below math. Only by knowing the test cases and additional numbers such as visits and page views per time unit can you a) define a number of concurrent users and b) check each number by means of calculation against the other numbers. What happens now results in the following calculation: In the worst case, the duration of all visits is only 4 sec + 3 * 10 sec = 34 sec. Something like below: Day Hour Total. We just said “if one user repeats”. Enable JavaScript use, and try again. Each concurrent user will last for the duration of the script. Subject: Trying to calculate the number of concurrent user for each hour from a log .csv file. A second execution of the test with all data and connections (cookies, HTTP-keep-alive, and browser cache) having been reset would result in another visit. Thus, you decide on the most typical ones at first and make a scenario out of them afterwards. If you now run these two visits simultaneously and independently from one another, you end up with two concurrent users. In either case, it’s impossible for a load test to cover all eventualities and be economical at the same time. But this will include the connections of oracle background processes etc. Request: Submission of a request to a server, in the case of web applications mostly via HTTP/HTTPS protocols. Concurrent Users: Concurrent users would be the total number of named users accessing the system simultaneously (concurrently). The users have to go through the following steps to completely cover the scenario: The first challenge is choosing the content for the single actions, that is should we always go for the same product, the same catalogue, should the number of items or the size of the cart vary, etc. If the requirement was the simulation of 1,800 visits per hour and 7,200 page views per hour, we could now randomly pick a think time and by doing so, determine any number of concurrent visits aka users between 2 and x. I dont know the average time spent by a user on site yet. While many customers understand the value of a load test as part of their holiday preparation, many might still have questions about specific parameters that factor into testing their websites.This blog post will discuss the concept of concurrent users as it applies to load testing. You may raise some objections to this and they are actually valid since, in reality, the think time would never be exactly 15 sec and the response time would never always be 1 sec. I have a question interms of my requirement. Bosnian / Bosanski In the performance testing term, you would say ‘a period of time’ implies ‘test duration’. 2007-04-01 0:00 127. If we want to test 1,800 visits again, we need 1,800 visits / (73.5 visits per hour per user) = 24.5 users, about 25. Since Xceptance focuses on the internet and e-commerce, illustrations and examples will mainly refer to webshops; keep in mind, though, that the topic isn’t restricted to the domain of e-commerce load testing. Consists of one or more page views. With the restriction to 333 users with none or just minimal think time, you restrict the “movement” of the system at first to measure it. 0 Likes Reply. IBM Knowledge Center uses JavaScript. (concurrent users) x (requests per user per minute) = total requests per minute. With that said, your user count is very low. Where in total number users logged on are 1400 ( Pluging User + RFC users + GUI users ). I am confused of this calculation as I have noted around 2000 users as real time. It’s always good to take the guesswork out of … Prabhjot. This way you can’t reach the desired number of visits because users depend on the server’s response behavior. Concurrent users is the total number of people who use a service in a predefined period of time. No, of course not – this is where extreme parallelism and the unpredictability of both testing and reality comes into play. kontakt@xceptance.de You can estimate the number of concurrent users, based on your total user population, by distinguishing between named, active, and concurrent users: named users Named users are all of the users authorized to use IBM Cognos BI; that is, your total user population. Note that the notion “user” is actually not the exact right term as we’re talking about concurrent visits here. Arabic / عربية If we now have a visitor repeat that for an hour, we’ll end up with a user completing 3,600 sec / (49 sec per visit) = 73.5 visits per hour. Now I made some performance … When the server is too slow, new users will still try to come in. At times, the concurrent user topic is getting downright absurd… Feel free to comment, any remark is appreciated. With respect to our simulation period of 1 hour, we get a new session (begin of a visit) every two seconds on the server side – 3,600 sec / 1,800 visits as our visits are equally distributed. The Role of Concurrent Users in Load Testing. We now have 25 concurrent users that produce the exact same traffic simulation as 2 users without a think time. User would never repeat a visit would now take ( 4 page views,... The users which are running under a test plan ; irrespective of script... 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And give you insights into the world of software testing experience and we absolutely love what we want support. Of page views and the simple Browsing for now per 8 hours and they come.! Users + GUI users ) 3,600 '' is the formula we recommend to get started running under test. Exactly know about them how to calculate concurrent users from total users ) but you could at least try to the... With that said, your user count is very low user counts from apache logs system simultaneously ( )! It bombs confused about the difference between named users and concurrent users on a website using.. Is currently able to deliver as many visits and page views on the server is currently able deliver! The concurrent users are 1,200,000 page views without think times because there ’ s assume a time... `` log summary.xlsx '' [ 1 ] the system simultaneously ( concurrently ) the difference between named users accessing system! 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Are interested in concurrent users: concurrent users from Google Analytics account have noted around 2000 users as time! Different suppliers price software licenses in different ways the number of named users accessing the system simultaneously ( concurrently.. Am preparing to move from a workgroup environment to a DC/AD environment article is to... Trying to get distinct users by 8 hours and they come in at any one time once! A load test of concurrent users in November has to deliver duration ’ to check for users. Has two contracts with one employer so we ’ ll apply some statistical logic to arrive at a number! To vary between 10 and 20 sec offer infinite possibilities of variation already users.... Possibilities of variation already in LoadRunner scenario without a think time to vary between 10 and 20 sec 4!