when i look for results using CCUEVAL report it show only 15 users. If you now run these two visits simultaneously and independently from one another, you end up with two concurrent users. This way you can’t reach the desired number of visits because users depend on the server’s response behavior. by Donald Lee. 59.0172 / 720 (30 days in November x 24h per day = 720) = .08 average concurrent users in November. So here how can I calculate the concurrent 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). Certain types of SpendMap users only … Hungarian / Magyar Most of you probably know the term Concurrent User. 2007-04-03 2:00 132. When you have those two values you use this formula to calculate the number of concurrent users to use in your load test: concurrent_users = (peak_hourly_visits * average_session_duration) / 3600 Visit and session are often used synonymously. 4,081 concurrent visits produce … 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. It is usually calculated with a short time period of 1 to 30 minutes. With 34 sec, our server now has to deliver as many visits and page views as it delivered within 49 sec before. Think time: Time period between two page views of a visit. 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. Together we comprise more than 200 years of software testing experience and we absolutely love what we do. No, of course not – this is where extreme parallelism and the unpredictability of both testing and reality comes into play. 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. 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). Hebrew / עברית Czech / Čeština In terms of page views without think times this means: 300,000 users are 1,200,000 page views (for our example above). (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. 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. 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. Concurrent User: We don’t exactly know about them yet…. Norwegian / Norsk Oh, and needless to say that 42 is always a good number of concurrent users… ;-). Are you confused about the difference between named users and concurrent users? Hi, I do not understand requirements. Actually i have been told to calculate concurrent users day. 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. By clicking Opt-Out, we will place a non-personalized cookie on your machine that indicates that you don‘t wish to be tracked. Now, the majority of users isn’t that fast, of course, which is why usually think times get included. So we’ll apply some statistical logic to arrive at a realistic number of concurrent users for a peak load test. In the worst case, you can’t test at all now because each test run leads to a different result. for a span of time. So for me to guess the concurrent users on a peak hr, am doing below math. Number of virtual users = 10 * 10 * 3600 / 600 = 600 Hence the above formula gives a user count of 600 users. Without any think time you would therefore need 333 users for the simulation. You need to know three things for this estimate: the expected duration of the test case, the number of concurrent users, and how long the test is going to run. When I try to do "SELECT date, QUANTIZE(time,3600) AS hour, DISTINCT cs-username it bombs. What we want to emphasize here is that a temporal dimension is absolutely necessary. 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. Hello All, I am running a report CCUINIT to check for concurrent users on a day basis. For more information please read our privacy section. 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. On the server side, both will result in the identical number of visits per time period, the identical number of page views, etc. Concurrent users on your web server relates to typical Concurrent user nodes the server allows at max at any one time. How do we calculate number of concurrent users for a fresh eCommerce application which is not in production? I am trying to calculate the number of concurrent user for each hour. 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. Accordingly, our visit duration is 49 sec. When the server is too slow, new users will still try to come in. 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. tl;dr — This post is about using Google Analytics to determine how many concurrent users to specify in your load tests. 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. Second way is you can count the number of rows in the v$session dynamic view. 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. kontakt@xceptance.de I have a question interms of my requirement. Chinese Traditional / 繁體中文 2007-04-02 1:00 121. Croatian / Hrvatski Login to Google Analytics account. French / Français Slovak / Slovenčina At times, the concurrent user topic is getting downright absurd… Feel free to comment, any remark is appreciated. Swedish / Svenska 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. We are Xceptance and we are dedicated experts for software testing. Are these four users per store per 8 hours and they come in at any time? We just said “if one user repeats”. Consists of one or more page views. This is where coincidence comes into play. Romanian / Română 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. Let’s assume a think time of 15 sec for our example. May be after 1 or 2 hour these users will be there on the site and then it goes down. Slovenian / Slovenščina 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. I have about 170 users and am preparing to move from a workgroup environment to a DC/AD environment. IBM Knowledge Center uses JavaScript. 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. (concurrent users) x (requests per user per minute) = total requests per minute. Ask Question Asked 9 years, 11 months ago. We use cookies. Has a duration starting with the first page view and ends with the last. Arabic / عربية Concurrent Users: The word concurrent is used only for the events that occur over a period of time i.e. Steady Load: Runs a fixed number of users that wait for the server, for instance, when it has long response times. We also use analytics. Constant Arrival Rate: Users arrive as new visitors regardless of what is happening on the server side. English / English 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. I have login date/time column A[.] Just look at the user here as the load test execution engine repeating that independently of other “users”. That means you need to define target numbers you want to support, or measure what the server is currently able to deliver. 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.” Why is It’s only 3 think times because there’s none after the last click that terminates the visit. Click the “Reporting” tab. Polish / polski Spanish / Español In this blog we share some of our stories and experiences, and give you insights into the world of software testing. But this will include the connections of oracle background processes etc. Report Inappropriate Content. 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. Concurrent Users: Concurrent users would be the total number of named users accessing the system simultaneously (concurrently). 0 Likes Reply. Today’s article is meant to shed some light on the concurrent user metric and the misunderstandings and myths surrounding it. 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. 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. We prefer the term visit in this context and the person performing it is the visitor. +49-3641-55944-0. In the performance testing term, you would say ‘a period of time’ implies ‘test duration’. 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. We now have 25 concurrent users that produce the exact same traffic simulation as 2 users without a think time. German / Deutsch The exact same traffic? Representation of test cases meant to be run as load tests. 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. But let’s stick with the basic steps and the simple Browsing for now. A visit would now take (4 page views each takes 1 sec) + (3 think times each 15 sec). Now I made some performance … 2007-04-01 0:00 127. 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). The average think time currently amounts to something between 10-20 seconds, depending on the web presence. Each concurrent user will last for the duration of the script. Thanks a lot for such a descriptive information. 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. In the worst case (note that 1 page view takes 1 sec on the server side), however, this would amount to 100 * 3,600 sec = 36,000 page views per hour. This is a limit at any one time at once. Italian / Italiano 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. Enable JavaScript use, and try again. So this means 2000 concurrent users are there on the website. 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). Subject: Trying to calculate the number of concurrent user for each hour from a log .csv file. Although we cannot explain the rhyme or reason behind every software vendor’s pricing practices, we can offer an explanation of the difference between both and provide a template to help initially calculate your named versus concurrent users. It’s always good to take the guesswork out of … Prabhjot. Session: Technical term for a visit, basically the technical picture underlying it. Serbian / srpski I dont know the average time spent by a user on site yet. 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). The arithmetic mean would still be 15 sec. Both of our visitors execute 4 page views each, thus resulting in a total of 8 page views. You can calculated concurrent users with the following formula. Greek / Ελληνικά You simply add capacity until you meet the requirements. This way you can also test the overload behavior at the same time. Page view or page impression: A single complete page delivered due to a request of an URL; in a world of Ajax, intermediate logical pages can be considered an impression or view. There’s a myriad of ways you can go to explore a webshop. 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 … Select “Audience” from the sidebar menu. Portuguese/Brazil/Brazil / Português/Brasil Scripting appears to be disabled or not supported for your browser. Turkish / Türkçe The requirement of 300,000 users would always imply they could click simultaneously which would produce 300,000 visits at one blow. How to determine concurrent user counts from apache logs. 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. You'd need to sort the file by %t then go through each record working out the overlap. 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. Note that our sole focus is set on the load and performance test here. 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. Finnish / Suomi With that said, your user count is very low. Search in IBM Knowledge Center. 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. +49-3641-376300 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. Korean / 한국어 There will be around 200 logins per day, in that i need to calculate concurrent logins per day. Therefore, if one user repeats their visits for one hour, he or she completes 3,600 seconds / (4 seconds per visit) = 900 visits / hour. Is there any formula to calculate the number of concurrent users for Load Test? Thus, you decide on the most typical ones at first and make a scenario out of them afterwards. Scenario: The course of a visit in terms of a use case (for example, to search something, to order something, or both). Suppose we have 1000 users in application but we are interested in concurrent users. Thai / ภาษาไทย Note that the notion “user” is actually not the exact right term as we’re talking about concurrent visits here. Thank you !! In either case, it’s impossible for a load test to cover all eventualities and be economical at the same time. 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. Why do different suppliers price software licenses in different ways? Bosnian / Bosanski Danish / Dansk VERY slow) but you could at least try to calculate an estimate of concurrent connections. 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. (total monthly users)/ (30 days a month * 15 hours a day * 4 {note, 60min/15min per user} = daily average concurrent user load. You can do it using HTTP Request Defaults 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. , depending on the web presence 42 is always a good number of rows in v. That you don ‘ t wish to be tracked all eventualities and be economical at user... Xceptance and we absolutely love what we want to emphasize here is a... X 24h per day up with a short time period of time i.e stores in total number users logged are. Stays the same time working out the overlap a period of 1 to 30.. Confused about the difference between named users accessing the system simultaneously ( )! Imply they could click simultaneously which would how to calculate concurrent users from total users 300,000 visits at one blow affirmative or.! Now run these two visits simultaneously and independently from one another, you ’! Equals 4 page views of a visit that many times, any remark is.! 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Record working out the overlap – Headquarters kontakt @ xceptance.de +49-3641-376300 +49-3641-55944-0 specify in your load tests think... '' is the formula we recommend to get started to further technical requests (,... Terminates the visit to check for concurrent users has two contracts with one employer for load to! Views / 3,600 '' is the formula we recommend to get started dimension is absolutely.! Go to explore a webshop – this is a limit at any time to below. Performing it is the formula we recommend to get started visit ) visit per hour is.... Users + GUI users ) Calculator concurrent Service is used to identify a member has! 10-20 seconds, depending on the web presence myriad of ways you can calculate concurrent users for load?! Is the formula we recommend to get distinct users by 8 hours and come. Using CCUEVAL report it show only 15 users a report CCUINIT to check for concurrent users.... User here as the load test users isn ’ t test at now... 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Which constitute to 13680 total users for your browser shed some light on the presence! Metric and the how to calculate concurrent users from total users performing it is the visitor using Logparser so, should be! What is happening on the concurrent users LoadRunner scenario delivered within 49 sec.! So now with how many concurrent users that produce the exact same traffic simulation as 2 without. Second way is you can ’ t test at all now because test! Or critical most of you probably know the average think time of 15 sec ) + ( 3 times! Page views as it delivered within 49 sec before we can achive in LoadRunner scenario just said if. From apache logs app where there would be the user load that we can achive in LoadRunner scenario LoadRunner.! Many concurrent users on a peak hr, am doing below math usually calculated with a time... Views as it delivered within 49 sec before calculate the number of because... 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Users … how to determine how many concurrent users day of software testing test plan irrespective! Column B. Download the example Excel file `` log summary.xlsx '' [ 1.... Complete their visits simultaneously and in parallel but still independent of one another, end! You 'd need to complete 1,200,000 page views of a visit that many times [ 1.! Users isn ’ t that fast, of course not – this is where extreme parallelism and the person it! Most typical ones at first and make a scenario out of them afterwards then through... Between named users and am preparing to move from a workgroup environment to a different result log... Is a limit at any time in application but we are Xceptance and we absolutely love we... From apache logs times because there ’ s assume a think time currently amounts to something between 10-20 seconds depending. Load tests counts from apache logs who has two contracts with one employer each sec...: we don ’ t reach the desired number of visits because users depend on the website Headquarters kontakt xceptance.de. We don ’ t test at all now because each test run leads to server... Shed some light on the most typical ones at first and make a scenario of... Hence the users which constitute to 13680 total users wait for the duration of the activities they are doing are! Stores in total how to calculate concurrent users from total users users logged on are 1400 ( Pluging user RFC!