Configuration :: Bringing Down The Initial Latency?

Jun 11, 2010

My application is hosted on IIS6.0 web server. And we observed that the initial page load time is high (30-40 sec) and further page loads take only 5sec.To bring down the page load time, I have deployed the precompiled web solution on IIS.But unfortunately the initial page load time did not came down to larger extent.

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WCF / ASMX :: Web Service Latency / How To Measure The latency(response Round Trip Time) For a Web Service

Jun 17, 2010

I am writing a program to measure the latency(response round trip time) for a web service. I need to have this at client side.

My initial plan is to store the time at which request is sent and then calculate the difference in time when we recieve a response from the web service. Is this the correct way to measure latency of web service. This has some overhead because of storing time and all. How can this be done?

Another option is to attach a timestamp with the SOAP request. But the server should return the timestamp. This will not be possible in case of third party web services.

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Configuration :: Latency / Users On Website Not Able To Navigate

Sep 9, 2010

I am actually experiencing problems with some users on my website: www.newturf.com

Some say that they are not able to navigate because the site is too slow.

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Visual Studio 2010 Initial Configuration

Jan 7, 2011

I just reinstalled VS 2010 Ultimate, and I accidently selected vb project as my preffered default VS settings, but I really wanted to select the Web Application as my default. Can somone guide me in the right place so I can correct this?

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Configuration :: Initial Web Application Load Is So Slow?

Apr 11, 2010

I have a simple web application that loads very slow the very first time after i deploy it. I am using ASP.NET 3.5 SP1 / VS 2008 / Linq / Web forms to load the default.aspx home page. It is a very light page with nothing too fancy.Now to debug this load issue, I logged all the events in the global file and got the following log text:

2010-04-10 11:58:38,083 - Application_Start
2010-04-10 11:58:38,111 - Application_BeginRequest
2010-04-10 11:58:38,117 - Application_AuthenticateRequest
2010-04-10 11:58:52,321 - Session_Start
2010-04-10 11:58:52,454 - Page_Load
2010-04-10 11:58:53,951 - End Page_load
2010-04-10 11:58:53,981 - Application_EndRequest

Now my question is, between the Application_AuthenticateRequest and Session_Start functions, there is generally around 10 - 15 seconds - which i believe seems to be the problem.The thing, I am unsure why this is slow between these two functions.I am not using any forms authentication.Also, I am not doing anything fancy in the global file besides setting a session variable.

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Configuration :: Slow Initial Page Load Speed And Compile Settings

Dec 8, 2010

Over the last week I've been investigating an issue for one of our clients whereby the initial page load following a deployment of their website takes around 1 minute, resulting in unacceptable downtime for end users. This was happening not only for code deplyments (bin dll's and .config files) but also if there were large numbers of .aspx pages updated. For code deployments it's not an issue, but for aspx updates it is; in this particular scenario, we are making use of a 3rd party content management system (RedDot from OpenText) in which every page of the site is published out as a distinct .aspx page. This means that for this website there's somewhere in the region of 2,400 separate .aspx pages. I realise this isn't an ideal situation but we're working within the constraints of the CMS, and we managed to correlate the instances where the site was unresponsive with App pool restarts, which also corresponded to publications of of .aspx pages.

I found an article by Tess Ferandez [URL] which describes all the reasons why the app pool may restart, and it does seem that if more than 15 .aspx pages are changed then the app pool will recycle and the pages will be re-compiled. Another msdn article [URL] then gave me a few pointers on how to start addressing this problem, and for the moment I've set a flag on the compilation options to prevent batch compilation:

<compilation batch="false">

This means that the initial page load now takes around 6 seconds instead of 1 minute, which is a great improvement. However, I also used the "Compilations Total" performance counter to investigate the number of pages that have been compiled by ASP.NET for my site and was quite surprised that the total number of pages that get compiled peaks at 44, which is odd given that there are 2,400 aspx pages in the site. If the batch flag is set to false, the counter slowly increments by 1 page at a time as you click around on the site; if batch mode is true, the initial compilation takes the number straight to 44 over the course of ~60 seconds. What I'm really struggling to understand is why all 2,400 pages aren't compiled. Does anyone have any inside info on what might be going on as all the documentation I've read seems to indicate that all of the pages should be compiled and this counter should be much higher.

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What Are Possible Causes For App_Offline.htm Not Bringing The Site Down

Aug 23, 2010

Normally, I use App_Offline.htm for taking the site offline. But occasionally, when I do that, the site just hangs (like in: browsers wait forever, server gives no response at all). This seems to happen on an updateable site when I change something, like a control and afterward, when it doesn't go quick enough (site hangs), I place App_Offline.htm in the root of the website.

In most cases, this immediately takes down my site. But occasionally it doesn't. In those cases, I cannot just stop the website (when I restart, the behavior continues). Stopping the application pool doesn't let me restart the same app pool. The only two solution so far is restarting the whole IIS web service.

I'd like to prevent this from happening. Is this a bug in IIS not "breaking all actions" when App_Offline.htm is found? I use IIS 7 with Windows 2008 SP2 64 bit.

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C# - How To Determine Up/down Latency Of A Web App

May 20, 2010

I am trying to work out how to calculate the latency of requests through a web-app (Javascript) to a .net webservice.

Currently I am essentially trying to sync both client and server time, which when hitting the webservice I can look at the offset (which would accurately show the 'up' latency.

The problem is - when you sync the time's, you have to factor in latency for that also. So currently I am timeing the sync request (round trip) and dividing by 2, in an attempt to get the 'up' latency...and then modify the sync accordingly.

This works on the assumption that latency is symmetrical, which it isn't. Does anyone know a procedure that would be able to determine specifically the up/down latency of a JS http request to a .net service? If it needs to involve multiple handshakes thats fine, what ever is as accurate as possible.

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Why Sql Not Bringing Back Results Unless Set Varchar Size

Jun 17, 2010

I've got an SQL script that fetches results based on the colour passed to it, but unless I set the size of the variable defined as a varchar to (50) no results are returned.

If I use: like ''+@Colour+'%' then it works but I don't really want to use it in case it brings back results I don't need or want.

The column FieldValue has a type of Varchar(Max) (which can't be changed as this field can store different things). It is part of aspdotnetstorefront package so I can't really change the tables or field types.

This doesn't work:

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But this does work:

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The code is used in the following context, but should work either way

<query name="Products" rowElementName="Variant">
<sql>
<![CDATA[
select * from dbo.MetaData as MD where MD.Colour = @Colour
]]>
</sql>
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</query>

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Bringing Java / Classic ASP Developer Up To Speed With C# WinForms?

Jan 12, 2010

We're starting a fairly large project that is going to be using all of the company's development resources and I've been asked to help bring up to speed and mentor a co-worker in C#/ASP.NET/WebForms 3.5 who has years of experience with Java and Classic ASP. What are your recommendations and best practices for helping an experienced developer learn the framework and become familiar with ASP.NET best practices? Books or resources? How often should I be conducting code reviews?

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Configuration :: "Initial Catalog" Not Recognized

Mar 24, 2011

We are working on a application using sql server 2000 and vs 2003. We have recently migrated the database on an application to a new server and the application stopped working. We are getting the below error.

OleDBProperty 'Initial Catalog' was not found. The code that we are using where the error is coming is givent below.

[Code]....

The code was working fine earliar and became erroroneous only after database migration.

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Nov 19, 2010

I need to capture the amount of time that ASP.net takes to execute each page request in my application, but I need to exclude any network latency. I am currently capturing render times by using the StopWatch class and starting the stopwatch during the OnInit method of the page lifecycle and stopping it after the Unload method completes. It seems that the Unload method includes the time it takes send the request to the client, thus including any internet/network latency. What is the last possible point I could stop the stopwatch in the Page Life Cycle that would not include the time it takes to send the request to the client. Would it be directly before the Unload event?

Related question: Does ASP.net finish building the response before it starts sending to the client? Or does it start sending asynchronously, while the response is being formed?

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I have this code in a class that all of my pages inherit from:

readonly Stopwatch _serverExecutionTime = new Stopwatch();
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UPDATE

I tried capturing the execution time at the end of the OnRender method, at the start of the OnUnload method and at the end of the OnUnload method. In all three cases the difference in times was at most 1 millisecond. Even when testing this from a client in Europe to a server in the USA, the times were identical.

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Initial Drop Box Value?

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How To Change The Initial Value Of A DropDownList

Mar 22, 2011

I know that this question has been asked here before and I tried to implement the solutions I have found here but without success

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Control Initial Value Not Display After 1st Run?

Aug 24, 2010

I encounter a weird problem when I am run the app via F5 or View In Browser. When I run the following page for the first time, "Hello" is shown on the textbox. Clicked on the 'Click Me' button, the text is changed to "Clicked!". That's fine. Close the brower and run F5 (or View in Browser) again, the Textbox shows "Clicked!". It doesn't display the initial value anymore. I see this problem on IE6 (and thatis the only option for my employer), but not on FF3.6 nor Googgle Chrome 4.x. I thought it could be related ViewState. But, the problem persists after ViewState is disable.

Default.aspx File below:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
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<html xmlns="http://www.w3.org/1999/xhtml">

[Code].....

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Slow Initial Page Load

Jan 22, 2010

I'm writing a simple web site using codebehind for each page, however using the "codefile" directive, not "codebehind" as such, because I'm not precompiling. I'm just using a text editor to edit the aspx and codebehind files. Problem is, every time I make a change to the code or the aspx file, and refresh the page in the browser, it takes a 2 or 3 seconds to come up the first time, like it's doing an on-demand initial compile. I assume that's what it's doing, as after the initial load, the page refreshes without any delay at all.

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C# - App_Themes Not Loading On Initial Load

Jun 14, 2010

I have an application where different users can log in via a single portal login. When they log
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[Code]....

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[Code]....

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