I have an self-build asp.net page, (link), and on my own localhost-server it runs very fast.But when I have uploaded it to my rent server (Win08Server, 3GB Ram, 3GhZ...) it goes very very slow (3-5 second a site-switch).
hot to find out what programm is disturbing or where I have a leak?
(the most of the content is static, only a 2 database querys at the beginning!!!)
Any tips How to figure out where is memory leak in my Facebook app, its ASPX using Facebook toolkit DLL and I am afraid the bug may be in that CS library.
The problem is that after one week uptime, server is running out of memory and needs to be rebooted, there are quite many users and I cannot run debugger on this "production server", so I would need to simulate somehow use on my local PC.
I have developed a website in asp.net framework 2 . This website is being hosted in two different servers without any change in code. My issue is about the performance of these 2 sites. One website is taking much time for inserting datas to the DB (SQL server 2005). 2 websites are having different DB server.
I think the issue is for the DB server. How can we rectify the DB performance while insertion and Is there any other cause for this permance issue?
I am not sure if this is the right forum. I can not find a forum for LINQ.
I am working on an application using LINQ. Application performance is not up to par and my tests show that it is LINQ queries that are slow. I was wondering if anybody can recommend where I can find an article about optimizing LINQ performance maybe by compilation or other methods.
I am creating a service oriented application where trying to have everything using services....however there is something I am not sure of , I am having a page that calls the database at the page load...so what would be better and faster?? to call database in pageload , or to call wcf service from javascript during javascript load ??btw , I am using a repeater in the page , but I have created somekind of an engine to create the suitable html so...I'll be creating the repeaters html using the wcf and resend it back to the page If I am using a wcf service at the start.
View 1 RepliesOn http://msdn.microsoft.com/en-us/library/w070t6ka(v=VS.100).aspx there is an example on how to do impersonation with .net 4.0. We have used this example in a class that inherits IDisposable for ease of use. However, when we use this class in a asp.net web application, we notice a slight but steady increase of Pool Paged Bytes in performance monitor. After a week, the application crashes.
I've tried different implementations of the impersonation-class, using http://msdn.microsoft.com/en-us/library/w070t6ka(v=VS.90).aspx and http://support.microsoft.com/kb/306158 as reference, but they all show the same leak.
Where does this leak come from? Is there a problem with the windows api? We are running Windows 2008 R2.
This is our current version of the impersonation class:
public class Impersonator : IDisposable
{
public Impersonator(string username, string domain, string password)
{
if (!ImpersonateValidUser(username, domain, password))[code]....
And this is the performance monitor graph of two webservers using different versions of the class:
When we disable the class, and use global impersonation via web.config, those lines are completely flat.
Update,I have made a test-application that successfully reproduce the problem. It can be downloaded here:
http://rapidshare.com/files/447325211/ImpersonationTest.zip
The result over 18 hours looks like this:
We got a problem in one of our ASP.net apps, the mscorwks.dll is using a lot of memory. where to start looking for the memory leak ?
mscorwks!EEVirtualAlloc+119: 1.26 GBytes worth of outstanding allocations.
I'm writing an MVC app and want to have a central DataBase factory class to provide all my DB connections, something like this:-
[Code]....obviously I'll have to instanciate this every time I need to use it, so I was thinking of making it a static class:-
[Code].... so that instead of my controller code saying
[Code].... I can just say
but would this cause a memory leak? I'm sure I remember reading somewhere that if a static class creates objects that persist beyond it's methods and return those (esp things like DB connection objects) these won't get garbaged collected when the calling method is disposed of as they were created/referenced outside the scope of that calling (controller action) method and so will hang around in memory?
var tableObject = DatabaseFactory.GetDatabaseTable();
List<DbRecord> records = tableObject.Table.ToList();
I created a site which fills an UpdatePanel with dynamically created buttons when clicking on an other button. Now every time I click the button the used memory increases. I already tried the workaround from http://www.crockford.com/javascript/memory/leak.html to remove old eventhandlers before updating the UpdatePanel. But the used memory still increase. Is there a problem with my code or is there an other workaround?
Here is the code of a sample aspx site which shows the problem: [Code]....
Browser IE8
OS WinXP SP2
.Net Framework 3.5 SP1
I have an .Net Framework #4.0 application that makes a large number of web requests using the WebRequest/WebResponse classes , as i see it has memory leak (or maybe i am doing something wrong)I Wrote some small simple application that demonstrates this:
class Program
{
public static void Main(string[] args)[code]...
The only one solution i came up with is use GC.Collect() (unmarked in example) , All the object are disposed , all streams are closed , am I missing something ?I found something but i don't understand the reason , if i minimize Console the memory usage decreases and looks O.K , what can be the reason for that is there a problem with Conosole or WinForm .
I've created a small class library to asynchronously call a WebService(Fire and Forget. I don't need the result).In a Windows Form application, the XXXAsync() method works fine. But, in a Web Application, the process is locked until the XXXCompleted event is fire.My problem is: I tried to create a Delegate and use the Begin/EndInvoke to call the XXXAsync() method. It worked fine, but, the w3wp process seems to be consuming a huge amount of memory. I'm calling the EndInvoke method properly. Invoking the GC.Collect did not free any memory
View 1 RepliesI heard that using "Using" Block avoids Connection Leaks in IDataReader. Is this correct??? If so how it will do that???
View 2 RepliesI am facing problem memory leak when I bind GridView to my dataset. The dataset will be retrieve when page first loaded (Not postback) and store into session. ANy postback will reuse the dataset from session.
The problem now is, whenever any postback, the memory leak is keep increasing and till 1GB. I read some articles and mentioned it is ASP.NET databind issue. Is it true? Any workaround?
I am using DevExpress Gridview basically, and hit out of memory exception whenever I keep refresh page that contains huge data. I reported to DevExpress team and they claimed it is ASP.NET gridview issue.
Therefore, I create a simple project, a girdview to sqlDataSource. Run the page and press F5 to refresh. I use ANTS profiler to check if any object instance is keep increasing but never been disposed. I found that, memory does happen in this simple project, as what DevExpress team claimed.[Code]....
I'm using the ToolkitScriptManager on a page so that I can use the update panel. Everytime I refresh the page the mem usage in task manager jumps up 3-4megs. I'm using IE7 and have removed all inline JS and JS files to no avail.
View 4 RepliesI have an application which was recently ported from Classic ASP to .NET 3.5. I'm pulling some data from a stored procedure and once retrieved, I'm doing using the Select method on the DataTable in a loop so I don't have to keep going back to the database.It appears that there's something wrong here as I can refresh the page repeatedly and see the memory usage increase by a few megabytes, up to the point where we get an error. If we recycle the app pool in IIS, it starts working again, for a little while.
Is there a memory leak in this method? I did some research on the subject and Microsoft said there was an issue like that in .NET 1.0 and 1.1, but I'm using a higher version.Or, is this something else, such as not managing resources correctly? Here's a snipped of my code:
[Code]....
Initially, this app was using XML instead of a datatable and using XPATH to query the data, but it was too slow. I thought using a dataset with DataTable selects was a better option, but now we found this issue. I was thinking since the loop executes several hundred times that getting all the data and filtering through it on the client was a better choice instead of calling several web methods to get the subsets of data.
It happens frequently when I try to copy & paste code inside VS 2010 with following message:
insufficient available memory to meet the expected demands of an operation at this time, possibly due to virtual address space fragmentation. Please try later.
and I check the memory usage with taskmanager on my computer. It is fine.
In order fix it, I need to close VS 2010 and restart again.
I have a memory leak somewhere that I cant find. Every few days my server will crash, and just before that I log a ton of SQL errors stating that it is "out of memory".
I cant find it anywhere, all of my connections are being disposed like so:
[Code]....
Then I call the connection from my pages like so:[Code]....
That is all pretty straight forward. The connection is disposed because it is implementing the USING clause. I am opening the connection in my connection manager class, and not where it is being utilized?Or, could the problem be in the below method I am using to populate a SqlDataReader:[Code]....
Now, at first it appears as though this could be the problem because the Connection isn't part of a USING clause, however doesn't the 'Data.CommandBehavior.CloseConnection' pretty much do the same thing. This makes sure that the connection is closed when the reader is closed, right? Here is how I call that above reader from my login page code behind:[Code]....
So the DataReader will get closed even without the .Close() because it is in the USING, and the connection should get closed because I specified it in the ExecuteReader paramters right?
I am trying to create strogly typed datasets for my project. When I right click on the xsd file that I need to generate a strongly typed dataset for I can't find the 'Advanced' properties as described in the below article (almost half way down)[URL]As I do not see the Advanced properties option I can't find the 'Custom Tool' property/option to set its value to 'MSDatasetGenerator'. Do I have to install some kind of patch on my VS 2005?
View 5 RepliesI want to change the text of the user name text box which is inside a log in view on selected index chaged event of a drop down list.
this is my code:
[Code]....
but both ddl and tb are null
Anyone knows how can I find the controls in code behind?
guess it's straightforward. On page load, i wanna check the group of which a particular belong to. Say, someADNameeckham belongs to Account. In that case, I only wanna get "Account". But I have no idea how to get the group name of a particular user belong to. It's for LAN web portal so I guess security is not a very big concern here.
View 5 RepliesI am working on an ASP.NET 3.5, C#, ASP.NET AJAX, JQUERY web application which currently is having some performance issues. I have a screen with the forms view control and when I edit the form and save it for the first time the POST takes 4.89 seconds and when I perform the same operation again for the second time the POST only takes 1.09 seconds. What could be the reason for this strange behavior?
Note: I am using firebug and I am disregarding the page resources (like js, images) load time.
EDIT: I am using the Web Deployment Project to precompile the application.
I'm now getting into EF and from what I'm seeing so far, I wouldn't have to worry about writing stored procedures any more. Looks like EF takes care of all of that -- including INSERT's that store data in multiple tables. One of the things they taught us when learning stored procedures was that they're compiled which has performance benefits. How does EF 4 fare against using stored procedures?
View 3 RepliesI'm trying to make a decision about how to display my data. What I have now is a list of products displayed in a repeater. But for code-maintenance I've put my product items in a seperate usercontrol and loading them in a loop with db results using LoadControl.The product control itself is very simple, just a few public properties like title, url, rating but I'm not sure if this will affect my performance. I did some reading here and on forums and some people say it's not the best practice especially if you have more then 20 or 30 of these controls. So, is it really a performance hit using this method or does it stay ok with around 10.000 hits a day.
View 2 RepliesI have developed a gridview which has displays 8,000 records. However, the user is compaining that it is too slow. A major function of this gridview is to filter on two of the columns. It seems to me that if the records were stored in memory it would be much faster. This is caching, I think. Is that the case? Since filtering is being done I don't think custom paging will help much. When they submit a filter, with custom paging wouldn't the entire table be read again? So I was thinking of trying caching which is available on SQL Server. Am I on the right track? Can you cache with an Access database? Can you think of any other ways to improve performance of a gridview?
View 1 Replies