So now with how many concurrent users … Bulgarian / Български The average think time currently amounts to something between 10-20 seconds, depending on the web presence. Let’s assume a think time of 15 sec for our example. This is a limit at any one time at once. Steady Load: Runs a fixed number of users that wait for the server, for instance, when it has long response times. The arithmetic mean would still be 15 sec. 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. Why do different suppliers price software licenses in different ways? 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. 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. 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. 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. Chinese Simplified / 简体中文 We use cookies. Let’s assume three scenarios: a visitor that is just looking (Browsing), a visitor that puts products into the cart (Add2Cart), and a visitor that checks out as a guest and wants their ordered items to be shipped to an address (Order). At times, the concurrent user topic is getting downright absurd… Feel free to comment, any remark is appreciated. In either case, it’s impossible for a load test to cover all eventualities and be economical at the same time. Session: Technical term for a visit, basically the technical picture underlying it. There is no methodical way. 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. 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. So for me to guess the concurrent users on a peak hr, am doing below math. The number of page views stays the same since 1 visit equals 4 page views and the number of visits is constant. Then you focus on stability and a predictable way of “decline”. So this means 2000 concurrent users are there on the website. So we’ll apply some statistical logic to arrive at a realistic number of concurrent users for a peak load test. Once you have those key pieces of information you can use the following formula to calculate the concurrent users. 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. +49-3641-55944-0. Both of our visitors execute 4 page views each, thus resulting in a total of 8 page views. 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. Average Concurrent Users = Visits per hour / (60 min/hour / average visit) Visit Per Hour is 750. If you now run these two visits simultaneously and independently from one another, you end up with two concurrent users. 2007-04-03 2:00 132. Bosnian / Bosanski 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. Note that our sole focus is set on the load and performance test here. You'd need to sort the file by %t then go through each record working out the overlap. Jena, Germany – Headquarters Thus, you need to complete 1,200,000 page views / 3,600 seconds = 333 page views per second. Why is That means you need to define target numbers you want to support, or measure what the server is currently able to deliver. I have login date/time column A[.] Enable JavaScript use, and try again. Second way is you can count the number of rows in the v$session dynamic view. This is where coincidence comes into play. German / Deutsch I dont know the average time spent by a user on site yet. Suppose we have 1000 users in application but we are interested in concurrent users. No, of course not – this is where extreme parallelism and the unpredictability of both testing and reality comes into play. It is usually calculated with a short time period of 1 to 30 minutes. Has a duration starting with the first page view and ends with the last. Visit and session are often used synonymously. Swedish / Svenska (concurrent users) x (requests per user per minute) = total requests per minute. 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. Just look at the user here as the load test execution engine repeating that independently of other “users”. The profile is suitable for controlled measurements. 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. 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. 0 Likes Reply. Portuguese/Brazil/Brazil / Português/Brasil 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. Danish / Dansk Feel free to comment below, whether affirmative or critical. What we want to emphasize here is that a temporal dimension is absolutely necessary. when i look for results using CCUEVAL report it show only 15 users. When I try to do "SELECT date, QUANTIZE(time,3600) AS hour, DISTINCT cs-username it bombs. Concurrent users on your web server relates to typical Concurrent user nodes the server allows at max at any one time. We are Xceptance and we are dedicated experts for software testing. 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. Chinese Traditional / 繁體中文 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. 59.0172 / 720 (30 days in November x 24h per day = 720) = .08 average concurrent users in November. Only these three scenarios offer infinite possibilities of variation already. Concurrent Users: The word concurrent is used only for the events that occur over a period of time i.e. Thanks a lot for such a descriptive information. With 34 sec, our server now has to deliver as many visits and page views as it delivered within 49 sec before. Slovenian / Slovenščina In the performance testing term, you would say ‘a period of time’ implies ‘test duration’. Japanese / 日本語 On the server side, both will result in the identical number of visits per time period, the identical number of page views, etc. 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. 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. Without any think time you would therefore need 333 users for the simulation. God bless, https://perfmatrix.blogspot.in/2016/11/no-of-usersthread-calculator.html. Search in IBM Knowledge Center. For more information please read our privacy section. 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 Catalan / Català Polish / polski Request: Submission of a request to a server, in the case of web applications mostly via HTTP/HTTPS protocols. 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.) 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. 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