how to calculate concurrent users from total users

Good Article. Without any think time you would therefore need 333 users for the simulation. Has a duration starting with the first page view and ends with the last. How to determine concurrent user counts from apache logs. The arithmetic mean would still be 15 sec. 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. 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. Report Inappropriate Content. Constant Arrival Rate: Users arrive as new visitors regardless of what is happening on the server side. 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. Consists of one or more page views. kontakt@xceptance.de It’s always good to take the guesswork out of … It’s only 3 think times because there’s none after the last click that terminates the visit. 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. This is where coincidence comes into play. When the server is too slow, new users will still try to come in. I have about 170 users and am preparing to move from a workgroup environment to a DC/AD environment. Visit and session are often used synonymously. 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. God bless, https://perfmatrix.blogspot.in/2016/11/no-of-usersthread-calculator.html. So here how can I calculate the concurrent users. Romanian / Română Hi, I do not understand requirements. 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. 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 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 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. Of course, a single user would never repeat a visit that many times. for a span of time. 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. 0 Likes Reply. Oh, and needless to say that 42 is always a good number of concurrent users… ;-). So for me to guess the concurrent users on a peak hr, am doing below math. Spanish / Español 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. The average think time currently amounts to something between 10-20 seconds, depending on the web presence. 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. 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. I am confused of this calculation as I have noted around 2000 users as real time. Why is With respect to our example, let’s assume the think time to vary between 10 and 20 sec. Now, the majority of users isn’t that fast, of course, which is why usually think times get included. Slovak / Slovenčina 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. Now, you may want to argue that they aren’t coming simultaneously. 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. Today’s article is meant to shed some light on the concurrent user metric and the misunderstandings and myths surrounding it. The number of page views stays the same since 1 visit equals 4 page views and the number of visits is constant. 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. Arabic / عربية Both of our visitors execute 4 page views each, thus resulting in a total of 8 page views. So we’ll apply some statistical logic to arrive at a realistic number of concurrent users for a peak load test. Greek / Ελληνικά Session: Technical term for a visit, basically the technical picture underlying it. I have a question interms of my requirement. 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. Actually i have been told to calculate concurrent users day. In the worst case, you can’t test at all now because each test run leads to a different result. The Role of Concurrent Users in Load Testing. Each store will have 4 users which constitute to 13680 total users. And logout date/time Column B. Download the example Excel file "log summary.xlsx" [1]. 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. Only these three scenarios offer infinite possibilities of variation already. Thus, you decide on the most typical ones at first and make a scenario out of them afterwards. The exact same traffic? May be after 1 or 2 hour these users will be there on the site and then it goes down. 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). Swedish / Svenska 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. By clicking Opt-Out, we will place a non-personalized cookie on your machine that indicates that you don‘t wish to be tracked. 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. In either case, it’s impossible for a load test to cover all eventualities and be economical at the same time. You can do it using HTTP Request Defaults tl;dr — This post is about using Google Analytics to determine how many concurrent users to specify in your load tests. We also use analytics. Login to Google Analytics account. 4,081 concurrent visits produce … 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. Thank you !! Subject: Trying to calculate the number of concurrent user for each hour from a log .csv file. Why do you divide your users by 8 hours? Hungarian / Magyar Concurrent Users: The word concurrent is used only for the events that occur over a period of time i.e. Serbian / srpski Note that our sole focus is set on the load and performance test here. (concurrent users) x (requests per user per minute) = total requests per minute. It is usually calculated with a short time period of 1 to 30 minutes. But this will include the connections of oracle background processes etc. I have login date/time column A[.] Dutch / Nederlands That means you need to define target numbers you want to support, or measure what the server is currently able to deliver. Something like below: Day Hour Total. Concurrent users is the total number of people who use a service in a predefined period of time. Scripting appears to be disabled or not supported for your browser. Vietnamese / Tiếng Việt. 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