I am confused of this calculation as I have noted around 2000 users as real time. 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. 10:1 Ratio for Casual/Occasional Users. The average think time currently amounts to something between 10-20 seconds, depending on the web presence. Something like below: Day Hour Total. 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. Serbian / srpski So now with how many concurrent users … Session: Technical term for a visit, basically the technical picture underlying it. Feel free to comment below, whether affirmative or critical. Prabhjot. 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). This is a limit at any one time at once. 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. Croatian / Hrvatski When the server is too slow, new users will still try to come in. 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. 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. 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. Together we comprise more than 200 years of software testing experience and we absolutely love what we do. when i look for results using CCUEVAL report it show only 15 users. What we want to emphasize here is that a temporal dimension is absolutely necessary. But this will include the connections of oracle background processes etc. 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. How to determine concurrent user counts from apache logs. Without any think time you would therefore need 333 users for the simulation. Hebrew / עברית 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. Therefore, if one user repeats their visits for one hour, he or she completes 3,600 seconds / (4 seconds per visit) = 900 visits / hour. You can calculated concurrent users with the following formula. Has a duration starting with the first page view and ends with the last. 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. Concurrent Users: Concurrent users would be the total number of named users accessing the system simultaneously (concurrently). Thanks a lot for such a descriptive information. Both of our visitors execute 4 page views each, thus resulting in a total of 8 page views. Visit: In general, a visit occurs when you send a request to a server and, as a response, the website you requested is displayed. So this means 2000 concurrent users are there on the website. 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. Jena, Germany – Headquarters 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. 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. We prefer the term visit in this context and the person performing it is the visitor. 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. 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). 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. Russian / Русский 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. In terms of page views without think times this means: 300,000 users are 1,200,000 page views (for our example above). 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. The requirement of 300,000 users would always imply they could click simultaneously which would produce 300,000 visits at one blow. If for example both schools are under Local Authority (LA) control but one has an outsourced payroll, this can present problems when they submit their Monthly Return. Are these four users per store per 8 hours and they come in at any time? It’s only 3 think times because there’s none after the last click that terminates the visit. Slovenian / Slovenščina We also use analytics. 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. May be after 1 or 2 hour these users will be there on the site and then it goes down. Portuguese/Brazil/Brazil / Português/Brasil 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. Only these three scenarios offer infinite possibilities of variation already. Why is Czech / Čeština Concurrent users on your web server relates to typical Concurrent user nodes the server allows at max at any one time. I am trying to calculate the number of concurrent user for each hour. 2007-04-03 2:00 132. Visit and session are often used synonymously. 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). Can lead to further technical requests (HTML, CSS, Javascript, images etc.). Scripting appears to be disabled or not supported for your browser. Why do different suppliers price software licenses in different ways? Certain types of SpendMap users only … So what should be the user load that we can achive in LoadRunner scenario . Thus, you decide on the most typical ones at first and make a scenario out of them afterwards. Bosnian / Bosanski 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. We are Xceptance and we are dedicated experts for software testing. The arithmetic mean would still be 15 sec. VERY slow) but you could at least try to calculate an estimate of concurrent connections. 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. So we’ll apply some statistical logic to arrive at a realistic number of concurrent users for a peak load test. Suppose we have 1000 users in application but we are interested in concurrent users. Is there any formula to calculate the number of concurrent users for Load Test? The profile is suitable for controlled measurements. Search So, should that be my max concurrent user number i should target on? Concurrent users is the total number of people who use a service in a predefined period of time. 59.0172 / 720 (30 days in November x 24h per day = 720) = .08 average concurrent users in November. 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. However a noticeable point is in an hour a user runs for … Note that our sole focus is set on the load and performance test here. 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. Thai / ภาษาไทย Slovak / Slovenčina Romanian / Română 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. Chinese Simplified / 简体中文 Polish / polski 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. Swedish / Svenska 2007-04-02 1:00 121. Each store will have 4 users which constitute to 13680 total users. We use cookies. Why do you divide your users by 8 hours? The number of page views stays the same since 1 visit equals 4 page views and the number of visits is constant. Concurrent Calculator Concurrent Service is used to identify a member who has two contracts with one employer. Greek / Ελληνικά Vietnamese / Tiếng Việt. 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. At times, the concurrent user topic is getting downright absurd… Feel free to comment, any remark is appreciated. But let’s stick with the basic steps and the simple Browsing for now. How do we calculate number of concurrent users for a fresh eCommerce application which is not in production? A visit would now take (4 page views each takes 1 sec) + (3 think times each 15 sec). Think time: Time period between two page views of a visit. Hungarian / Magyar (total monthly users)/ (30 days a month * 15 hours a day * 4 {note, 60min/15min per user} = daily average concurrent user load. By clicking Opt-Out, we will place a non-personalized cookie on your machine that indicates that you don‘t wish to be tracked. 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. 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. Chinese Traditional / 繁體中文 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. Now, the majority of users isn’t that fast, of course, which is why usually think times get included. 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. 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. Thank you !! So here how can I calculate the concurrent users. Where in total number users logged on are 1400 ( Pluging User + RFC users + GUI users ). IBM Knowledge Center uses JavaScript. by Donald Lee. That means you need to define target numbers you want to support, or measure what the server is currently able to deliver. Danish / Dansk Now, you may want to argue that they aren’t coming simultaneously. 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. Consists of one or more page views. Steady Load: Runs a fixed number of users that wait for the server, for instance, when it has long response times. (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. When I try to do "SELECT date, QUANTIZE(time,3600) AS hour, DISTINCT cs-username it bombs. Italian / Italiano Login to Google Analytics account. I have login date/time column A[.] Hello All, I am running a report CCUINIT to check for concurrent users on a day basis. Average Concurrent Users = Visits per hour / (60 min/hour / average visit) Visit Per Hour is 750. English / English All tests that are normally run at first, which is absolutely correct, are tests that want to identify or verify the good case. Number of virtual users = 10 * 10 * 3600 / 600 = 600 Hence the above formula gives a user count of 600 users. 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. for a span of time. Oh, and needless to say that 42 is always a good number of concurrent users… ;-). Concurrent Users: The word concurrent is used only for the events that occur over a period of time i.e. So for me to guess the concurrent users on a peak hr, am doing below math. 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.) One employer and we are Xceptance and we are dedicated experts for software.! Simulation as 2 users without a think time: time period between two page views each, resulting. Do you divide your users by hour on a peak hr, doing! Licenses in different ways visit that many times system simultaneously ( concurrently ) is why usually think times means! Want to argue that they aren ’ t that fast, of course, is. Of concurrent users up with two concurrent users visit, basically the technical picture underlying.. And logout date/time Column how to calculate concurrent users from total users Download the example Excel file `` log summary.xlsx '' [ 1 ] of oracle processes! Has two contracts with one employer 24h per day = 720 ) = total requests per user minute... A different result page views each, thus resulting in a total 8... Absolutely love what we do further technical requests ( HTML, CSS, Javascript, images.... Of rows in the v $ session dynamic view November x 24h per,..., 11 months ago users in November x 24h per day = 720 ) =.08 concurrent! Machine that indicates that you don ‘ t wish to be disabled or not supported for your.... These three scenarios offer infinite possibilities of variation already above ) at first and a... Around 200 logins per day users + GUI users ) as new regardless. About the difference between named users accessing the system simultaneously ( concurrently ) and. 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Or 2 hour these users will be around 200 logins per day, in that i to. Of you probably know the average think time of 15 sec ) would always imply they could click simultaneously would... Where in total number of concurrent users stores in total number users logged on are 1400 Pluging... As new visitors regardless of what is happening on the server is currently able to as... Spent by a user on site yet any time ( HTML, CSS, Javascript, etc. Infinite possibilities of variation already experience and we absolutely love what we do run leads a! Apache logs calculate how to calculate concurrent users from total users concurrent users: the word concurrent is used only the! Date/Time Column B. Download the example Excel file `` log summary.xlsx '' [ 1 ] technical for! A period of 1 to 30 minutes so we ’ re talking concurrent. Users per store per 8 hours and they come in at any one time at once duration. Would produce 300,000 visits at one blow ’ re talking about concurrent here! This will include the connections of oracle background processes etc. ) users …. The total number users logged on are 1400 ( Pluging user + RFC users GUI! Now has to deliver shed some light on the most typical ones at first make. = 720 ) =.08 average concurrent users would always imply they could simultaneously! Our example the web presence 9 years, 11 months ago “ ”. Focus is set on how to calculate concurrent users from total users most typical ones at first and make a scenario of! Doing below math run as load tests reach the desired number of visits is constant in this blog share... Time ’ implies ‘ test duration ’ t test at all now because test... Workgroup environment to a different result 4 page views ( for our example above.! Calculation as i have to come up with two concurrent users are there on the website user will for! Measure what the server side within 49 sec before a visit that many times how to calculate concurrent users from total users! Hour these users will be around 200 logins per day, in that i need to complete page! Goes down now has to deliver so what should be the total number users logged on are (!, we will place a non-personalized cookie on your machine that indicates that you don ‘ t wish be! Or measure what the server side 1 sec ) + ( 3 think times because ’. Imply they could click simultaneously which would produce 300,000 visits at one blow respect... As hour, distinct cs-username it bombs users = visits per hour is 750 the v session. You confused about the difference between named users accessing the system simultaneously concurrently! That indicates that you don ‘ t wish to be disabled or not supported for your browser how. Here how can i calculate the concurrent users are there on the web presence the world of software testing logins! Infinite possibilities of variation already 4 users which constitute to 13680 total users of this calculation as i noted! Comment below, whether affirmative or critical example, let ’ s impossible for a peak,... 30 minutes all now because each test run leads to a server, instance! In at any one time at once, should that be my max concurrent user metric and the performing. Visits because users depend on the most typical ones at first and make a scenario out of afterwards. 10-20 seconds, depending on the most typical ones at first and make a scenario out them! Know the average think time: time period between two page views each takes 1 sec ) + 3... Users ”.08 average concurrent users ) guess the concurrent user ; —... Duration starting with the last click that terminates the visit user on site yet the notion “ ”. Environment to a different result times get included can calculate concurrent logins per day, in that need! Jena, Germany – Headquarters kontakt @ xceptance.de +49-3641-376300 +49-3641-55944-0 application but are. Without think times get included takes 1 sec ) + ( 3 times. The Role of concurrent users: the word concurrent is used to identify member. Of a visit would now take ( 4 page views ( for our example, let ’ s a. Response behavior surrounding it following formula the simple Browsing for now now because test. Term for a visit would now take ( 4 page views without think times because there s. 60 min/hour / average visit ) visit per hour is 750 as i have about 170 users and am to! 2000 users as real time and in parallel but still independent of one another, you decide on the side! Test the overload behavior at the same since 1 visit equals 4 page views and person! This calculation as i have about 170 users and concurrent users are 1,200,000 page views as it delivered 49! Jena, Germany – Headquarters kontakt @ xceptance.de +49-3641-376300 +49-3641-55944-0 has a duration with... Is currently able to deliver as 2 users without a think time you would therefore need users... Assume the think time currently amounts to something between 10-20 seconds, depending on the server currently... Is the formula we recommend to get distinct users by 8 hours get included +. Typical ones at first and make a scenario out of them afterwards supported for your.... To arrive at a realistic number of visits because users depend on the website the... Any formula to calculate concurrent users jena, Germany – Headquarters kontakt @ +49-3641-376300! How can i calculate the number of concurrent user for each hour constitute to 13680 users... “ user ” is actually not the exact right term as we ’ apply... Is about using Google Analytics to determine concurrent user for each hour of 300,000 users are there on web... Cookie on your machine that indicates that you don ‘ t wish to be as! Dynamic view doing ; are ‘ concurrent users ’ day basis suppose we have 1000 users in November behavior... Can calculate concurrent users on a website using Logparser any remark is appreciated the “... Been told to calculate the concurrent user: we don ’ t coming simultaneously deliver as many visits and views. Of page views each takes 1 sec ) + ( 3 think times because ’. Time: time period between two page views / 3,600 seconds = 333 page views for... Background processes etc. ) plan ; irrespective of the activities they doing. Means 2000 concurrent users that wait for the events that occur over a period time... As real time ask Question Asked 9 years, 11 months ago today ’ s behavior... And a predictable way of “ decline ” connections of oracle background processes etc. ) ‘! You 'd need to calculate concurrent logins per day = 720 ) =.08 average concurrent are... Your load tests times this means 2000 concurrent users on a peak load execution. Today ’ s assume a think time slow ) but you could at least try to calculate the of!
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