I am working on a website in which more than a thousand users can login at a time and there may be more than 50000 total users. I am worried about the performance of the application in case of concurrent access.
what is the best way to manage that, so that my application runs without any performance issues.
Frameworks like Node.js, Tornado, and Twisted let developers create server-push applications that supports large number of concurrent hanging requests (10k+). From what I understand, they all achieve this by not creating threads to service each hanging request.
Can AsyncController be used to service large number of inactive concurrent requests?If so, are there any reasonably large ASP.NET MVC websites using this approach to create long-poll applications?
I would like to know the number of users logged into my ASP.NET 2.0 application.
Points to be considered:
1) Simplest way would be to use Application or Cache object to have the counts on Session start or end. However this would fail if there is a worker process recycle. Wouldn't it?
2) Should't make a difference whether the session is inproc/state server managed/ or SQL server managed.
3) Should preferably be seamless to a web-farm architecture.
I have one application and there are 1500 users of that application.When 200 users logged in application that time login page and other pages of applications are not opend. I want to manage 1000 of users at a time.
View 1 Repliesas all we know that we can create very simple chat using ajax timer & web service , it runs well for few users .
i want to leaverage same idea for site where 5000+ users will be there in chat room , messages are stored in queue hold in memory * dispatched as user request that is through java script timers calling page method or service ,
how well it will perform ? i know GTalk implements XMPP protocol(jabber) for the web chat
seems it will be difficult to got XMPP way ?
i want datalist to show only 6-8items ,as these datalist is connected to datasource which has more than 20 items..
like in facebook,we have lots of friends but in friend box only 6 friends is shown and when we click that we go to next page which display all list of friends...
My environment is ASP.Net + IIS 7.0 + Windows Server 2008 + .Net 3.5. I am wondering whether the number of users online and number of active session are the same thing? The other question is, no matter whether they are the same, how to calculate them (i.e. for a given time, what is the number of users online, and related active number of sessions)?
View 1 RepliesWe have implemented the ASP membership and roles..and we would like to display the users currently logged in and also display the number of users online so we can display that on the page. The list of users woudl only be available to our admins. BUt the number of users will show for everyone.
View 9 RepliesI have just started to look at the new "System.Threading.Tasks" goodness in .Net 4.0, and would like to know if there is any build in support for limiting the number of concurrent tasks that run at once, or if this should be manually handled.
E.G: If I need to call a calculation method 100 times, is there a way to set up 100 Tasks, but have only 5 execute simultaneously? The answer may just be to create 5 tasks, call Task.WaitAny, and create a new Task as each previous one finishes. I just want to make sure I am not missing a trick if there is a better way to do this.
[code]....
I'm running a ASP.NET website on my development box (.NET 2.0 on Vista/IIS7).
The Session_Start method in global.asax.cs logs every call to a file (log4net).
The Session_End method also logs every call.
I'm using InProc session state, and set the session timeout to 5 mins (to avoid waiting for 20 mins).
I hit the website, wait for 5 minutes unit I see the Session_End logging. Then I F5 the website. The browsers still has the session cookie and sends it to the server. Session_Start is called and a new session is created using the same session id (btw: I need this to be the same session id, because it is used to store data in database).
Result:
Every time I hit F5 on a previously ended session, the Session_Start method is called.
When I open a different browser, the Session_Start method is called just once. Then after 5 minutes the Session_End each F5 causes the Session_Start method to execute.
Update:
After the Session timeout, all subsequent requests have a session start & session end. So in the end my question is: why are the sessions on these subsequent request closed immediatly?
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Handling large number of images downloaded from server
View 4 RepliesI want to insert a large amount( approx 7000 records) of data into a table, My scenarios is that i need to check whether the record already exists then it will not insert it. Currently i am using a stored procedure for this which gets called for each record.
IF EXISTS(SELECT 'True' FROM MYTABLE WHERE ID = @ID)
BEGIN
--This means it exists, return it to ASP and tell us
SELECT 'This record already exists!'
END
ELSE
BEGIN
--This means the record isn't in there already, let's go ahead and add it
SELECT 'Record Added'
IF EXISTS(SELECT 'True' FROM [Aadil].[dbo].[SharePointSitesData] WHERE ID <> @ID)
Working on a heavy ajax based site with over 100 methods from all the ajax calls inside each of each controller all with basically the same code.Was thinking of changing them to a big case statement for readability which would keep the code a bit more dry and make it easier to read.What I am wondering is: Will there be a performance hit and is there a better way to deal with it?
View 4 RepliesI have 65 columns in the grid, if the columns are reduced to 20 then the speed when accessing from client is more or less similar to that accessing from web browser. Does it mean that all this performance issue is due to the data only ???
View 1 RepliesI have a project that will be assigned to me soon whereby I need to develop a survey which needs to support 40,000 users approximately. Now we are thinking of doing a staged approach so not all users are on the server at any one point of time. Probably splitting it so we can serve at least a few thousand of users...
I dont have much experience of how I can ensure to serve those levels of users on a server and how to manage this so I am after some advice?
From my understanding I need to do some stress testing on a server and obviously I need some figures i.e. average size of request, average size of response and content of response.
- Do I have to build the database and add records in to see what size is a typical survey row?
- Do I have to build the survey in .NET i.e. by adding controls etc and seeing what size is the page?
- The survey shouldnt be too instensive processing wise, it will be adding information into a backend sql database...
I have an ASP.net VB Web app I'm working on that has a requirement to provide a list of all our component part numbers to our engineers for selection into a custom Bill of Materials for reworking of an assembly. The list of part numbers is currently generated from a stored proc in our MRP systems/SQL database. The number of records being generated is slightly over 39K part numbers.
Although the SP only takes a few seconds to generate the data the web page is taking a couple of minutes to load, primarily because of the time to fill the control presenting the records to the engineers. I've bound the data to a combobox control to the engineer. They want to be able to type the first few characters of the part number if they know it and have the list filtered or be able to just scroll the data to find the part they are looking for.
I've read elsewhere that they may be a way to only populate a certain quantity of records rather than all 39K then filter based on the users actions. Unfortunately the discussions about doing this didn't provide any examples, references, etc.
My questions are these...
Is there a better way to handle this quantity of records than a stored proc and combobox? A
ny examples of a method to populate a certain number of records then filter based on user action?
I am having nearly more than 80 thousand records and i need to export in .csv format.
I need to export to woksheet.
I need to export nearly 65 thousands of records in one sheet,
When it reached the limit, it should exported in the next sheet.
In my database m having 1000 record and I want to display 10 record on each page on gridview so every time it fetch 1000 record so while page loading it is quite time consuming ..
View 1 RepliesI follow the following link for add dropdownlist in gridview.Adding Dynamic Rows in GridView with DropDownLists in ASP.Net..In this template field the drop down list contain 500 items how can i search the paticular item
View 1 RepliesI have around 100 rdl report files...what i have found in google is -> open RS Admin site upload each report...doing this manually takes a lot of time... We don't want to use Target report server url method and clicking deploy option to deploy the reports or report project onto the report server...because we are not provided with such production server url information...!! In client perspective...We just give the reports as a rar file...now client will have to extract the report files...and what should be the next step...!! Is there anyway to deploy or upload all the reports at a time...!!
View 1 RepliesHow to resize large number of images in a folder in c# windows application. I am using following code to resize images of my folders. If images are less than 1600 ( in number) then no problem but if images are more than 1600 then i am getting error. My code is given below:-
public static Image ResizeImage(string file, int width, int height, bool onlyResizeIfWider) {
using (Image image = Image.FromFile(file)) {
// Prevent using images internal thumbnail
image.RotateFlip(RotateFlipType.Rotate180FlipNone);
image.RotateFlip(RotateFlipType.Rotate180FlipNone);
[Code] ....
Thumbnail creation in ASP.Net: System.Runtime.InteropServices.ExternalException: A generic error occurred in GDI
I tried to find out about subject but with no success. The point is that in the beginning I've made many user controls. My site is too slow. I have not idea yet if it is because of user controls.
View 7 RepliesI have developed one simple application in that i am using mysql database. but my database size more thatn 4,50,0000, as well as ecah and every second my database is updated i.e record ll be added to the table how can i get the details for one single click.
View 1 RepliesI have a user control that is common to the application. It searchs for lakhs of Items in one go from the db and I set the selected Items in a list in a session to pass on to the pages that use it. Hence making the application a tad slower. The gridview that contains the Items should have sorting, page indexing. What according to u,I should do to enhance the application's performance ?
View 1 RepliesMy Asp.net application uses 25-30% of the CPU on a test server which has 600 MB Ram on it.
I can see the asp_wb process taking that much percentage of CPU.
This is when I am testing using one user.
How many users can the server afford then without falling over?
Is there a relationship between the CPU Usage and number of user aka if there are 2 users my application will sky rocket to 60% of memory usage?
