how to calculate concurrent users from total users

"Hourly Sessions x Average Session Duration (in seconds) / 3,600" is the formula we recommend to get started. Most of you probably know the term Concurrent User. Thus, you need to complete 1,200,000 page views / 3,600 seconds = 333 page views per second. 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. for a span of time. 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. 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. Turkish / Türkçe Now, the majority of users isn’t that fast, of course, which is why usually think times get included. We prefer the term visit in this context and the person performing it is the visitor. 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.) You can calculated concurrent users with the following formula. (total monthly users)/ (30 days a month * 15 hours a day * 4 {note, 60min/15min per user} = daily average concurrent user load. All tests that are normally run at first, which is absolutely correct, are tests that want to identify or verify the good case. 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). With that said, your user count is very low. How to determine concurrent user counts from apache logs. 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. If you now run these two visits simultaneously and independently from one another, you end up with two concurrent users. Note that our sole focus is set on the load and performance test here. In the ideal case, that means you only need 4,081 users but when the server behaves unexpectedly, up to 10,000 users will be activated. I have login date/time column A[.] This is a limit at any one time at once. Together we comprise more than 200 years of software testing experience and we absolutely love what we do. We use cookies. Chinese Simplified / 简体中文 I dont know the average time spent by a user on site yet. (aud * v) / p = cu (600 [10 minutes in seconds] * 500 [sessions in 1 hour]) / 3600 [1 hour in second] = 83.33 [concurrent users] You can also use the calculator below if you would prefer. Croatian / Hrvatski Concurrent Calculator Concurrent Service is used to identify a member who has two contracts with one employer. You can also question the numbers by approaching the problem from another perspective: if 100 users are simultaneously active, then they can simultaneously request 100 page views. This way you can’t reach the desired number of visits because users depend on the server’s response behavior. Finnish / Suomi Session: Technical term for a visit, basically the technical picture underlying it. 2007-04-03 2:00 132. 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. 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. 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. You can calculate concurrent users from Google Analytics account. Today’s article is meant to shed some light on the concurrent user metric and the misunderstandings and myths surrounding it. Visit: In general, a visit occurs when you send a request to a server and, as a response, the website you requested is displayed. Steady Load: Runs a fixed number of users that wait for the server, for instance, when it has long response times. Let’s assume a think time of 15 sec for our example. +49-3641-376300 In the performance testing term, you would say ‘a period of time’ implies ‘test duration’. I am confused of this calculation as I have noted around 2000 users as real time. Visit and session are often used synonymously. What we want to emphasize here is that a temporal dimension is absolutely necessary. Only these three scenarios offer infinite possibilities of variation already. Without any think time you would therefore need 333 users for the simulation. Are these four users per store per 8 hours and they come in at any time? kontakt@xceptance.de Dutch / Nederlands A visit would now take (4 page views each takes 1 sec) + (3 think times each 15 sec). However, if the users aren’t simultaneously active aka started a visit, they aren’t concurrent users anymore and then you don’t need to simulate them in the first place. In the worst case, you can’t test at all now because each test run leads to a different result. Thus, our test wouldn’t cover 300,000 users with 4,081 concurrent test users but 3,600 / 34 * 4,081 = 432.105 visits per hour. 2007-04-01 0:00 127. German / Deutsch Thank you !! Actually i have been told to calculate concurrent users day. 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. Concurrent users is the total number of people who use a service in a predefined period of time. So now with how many concurrent users … Where in total number users logged on are 1400 ( Pluging User + RFC users + GUI users ). Italian / Italiano IBM Knowledge Center uses JavaScript. Enable JavaScript use, and try again. (concurrent users) x (requests per user per minute) = total requests per minute. 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. Representation of test cases meant to be run as load tests. Macedonian / македонски Regarding the final result, the simulation of 4,081 users and 15 sec think time therefore equals the simulation of 333 users without think time. If there are problems on the server side, then the user number automatically increases to x + n (for example, to a total of 10,000 users). May be after 1 or 2 hour these users will be there on the site and then it goes down. Slovenian / Slovenščina Concurrent users on your web server relates to typical Concurrent user nodes the server allows at max at any one time. Prabhjot. Search 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. Select “Audience” from the sidebar menu. No, of course not – this is where extreme parallelism and the unpredictability of both testing and reality comes into play. Arabic / عربية I have a question interms of my requirement. However a noticeable point is in an hour a user runs for … Portuguese/Brazil/Brazil / Português/Brasil At times, the concurrent user topic is getting downright absurd… Feel free to comment, any remark is appreciated. 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. The exact same traffic? 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. Suppose we have 1000 users in application but we are interested in concurrent users. The number of page views stays the same since 1 visit equals 4 page views and the number of visits is constant. 2007-04-02 1:00 121. Once you have those key pieces of information you can use the following formula to calculate the concurrent users. Hi, I do not understand requirements. Scenario: The course of a visit in terms of a use case (for example, to search something, to order something, or both). Think time: Time period between two page views of a visit. Czech / Čeština Danish / Dansk On the server side, both will result in the identical number of visits per time period, the identical number of page views, etc. The profile is suitable for controlled measurements. Let’s start with a couple of key terms to help you understand what we’re talking about: A load test wants to reflect present load conditions or anticipated load conditions. Thai / ภาษาไทย 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. The requirement of 300,000 users would always imply they could click simultaneously which would produce 300,000 visits at one blow. 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. Chinese Traditional / 繁體中文 Oh, and needless to say that 42 is always a good number of concurrent users… ;-). Request: Submission of a request to a server, in the case of web applications mostly via HTTP/HTTPS protocols. 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. Bosnian / Bosanski Why is You want to know if you can cope with the traffic x where you assume x to be a constant worst case that applies to a longer period of time. Kazakh / Қазақша I would suggest the following approach: Make sure that JMeter virtual users represent real users as close as possible, to wit: HTTP Request samplers are configured to download embedded resources and use concurrent Thread Pool to download them - this will allow to fetch images, styles and scripts like browsers do. Concurrent User: We don’t exactly know about them yet…. Consists of one or more page views. On one hand, small businesses will overestimate the number of concurrent user licenses they should be purchasing because they do not know or understand the distinction between “concurrent users” and “named users.” 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. Catalan / Català Can lead to further technical requests (HTML, CSS, Javascript, images etc.). Accordingly, our visit duration is 49 sec. This is where coincidence comes into play. Search in IBM Knowledge Center. Concurrent Users: The word concurrent is used only for the events that occur over a period of time i.e. 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. 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. The arithmetic mean would still be 15 sec. In this blog we share some of our stories and experiences, and give you insights into the world of software testing. It’s only 3 think times because there’s none after the last click that terminates the visit. 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. 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. So for me to guess the concurrent users on a peak hr, am doing below math. Scripting appears to be disabled or not supported for your browser. You'd need to sort the file by %t then go through each record working out the overlap. You simply add capacity until you meet the requirements. And logout date/time Column B. Download the example Excel file "log summary.xlsx" [1]. Ask Question Asked 9 years, 11 months ago. Note that the notion “user” is actually not the exact right term as we’re talking about concurrent visits here. Is there any formula to calculate the number of concurrent users for Load Test? I am trying to calculate the number of concurrent user for each hour. 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