Drawback To Creating A Separate IIS Application Pool For Each Website / Application?
Jan 5, 2010
Currently, on our production IIS web farm, we host about 15 applications in a single App Pool (Default App Pool). There are two websites and about 13 virtual directories.A colleague has recommended that we change our IIS configuration so each application is a separate App Pool (with identical settings).
Is there any drawback or potential issues to doing this?Is it possible that ASP.NET applications could have been built with the requirements that they are all within the same App Pool?
Our website has all of the publicly accessible pages at the root and private pages (login required) in a folder below the root (call it "private").Private pages are accessed as
www.oursite.com/private/somepage.aspx.I want to run the pages in the private folder in a separate application pool without changing the URL for private users.I tried making the private folder a virtual directory but then the pages in the private folder did not render(I think because it did not find a web.config in the private folder).Is the answer to simply put a copy of the web.config that resides at the root in the private folder or is that problematic?
When I create a new website in IIS and its associated application pool, I get the option of setting the .NET framework to 1.0 or 2.0.Via windows updates I have installed versions 3.0 and 3.5..however these dont show up in the drop down list.I read that the aspnet_regiis -i command needs to be run in the installed .NET framework folder for it to be visible in IIS.However, the aspnet_regiis.exe is only present in the 1.0 and 2.0 folders. Can I use the same exe to register the 3.5 framework with IIS?
I'm trying to deploy an ASP.NET application using InnoSetup. I need to perform the following tasks:
Create an IIS application.
Create a new IIS application pool and set it's .NET version to 4.
Set the application pool of the new application to the new application pool.
I have found a script to create a virtual directory, but I need an application and application pool:
procedure CreateIISVirtualDir(); var IIS, WebSite, WebServer, WebRoot, VDir: Variant; ErrorCode: Integer; begin { Create the main IIS COM Automation object }[code]......
what is this error?how to handle it?Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.
.NET application pool often overflowing. What Should I do for solving this problem? I am using singletton class for db connection. Also; My all db connection lines in using code block. So, it be dispose by .NET engine.
I'm having issues with an ASP.net site (framework 3.5, IIS6 ) having very slow 'first hit' response times. I'm guessing that the issue is to do with the app pool recycling and having to warm up.
I got to thinking. As part of the site I have a HTTP module that spins up a 'never ending loop' on a separate thread which periodically (every 5 seconds) calls an sproc on SQL to make sure the database is still there. I'm wondering if a similar approach might work to get the site to make an HTTP request to "itself" as a keep alive.
My question is, before I go and do this, can anyone think of any reason why it won't work? For example, something like "oh no... ASP.Net will figure out that you're playing with yourself and not go through the whole page lifecycle... etc etc".
I am asking this out of curiosity. I got the following error when this is not enabledAn attempt was made to load a program with an incorrect formatThis is related to loading a class library but this particular class library is compiled for any CPU with VS2010 64 bit running on Win7 64-bit
I don't know if this is the right place to post, anyway:Once in a while the application pool of my website has stopped. After taking a look into the Windows logs, In can see in the System log the following: first I see 5 warnings, and then an error. The warning is:"A process serving application pool 'domain.com' suffered a fatal communication error with the Windows Process Activation Service. The process id was '1568'. The data field contains the error number."The process id is different for all 5 warnings. Then the error message is:Application pool 'domain.com' is being automatically disabled due to a series of failures in the process(es) serving that application pool.The warning:
I have noticed how editing the web.config file in an application folder causes that application pool to recycle and pick up the changes.
How does IIS achieve this and is it possible to extend this functionality for another config file? Or is this dependency hard-coded somewhere? This is related to the possiblity of deploying configuration changes to a web server without having to edit the web.config, which is usually maintained by a different team.
Note that I don't want to manually invoke this recycle event, but have it work in the same way as with web.config. I'm aware that I could simply add these settings to web.config, but that's not what I've been asked to do.
My application is running in a shared hosting environment. I do have a dedicated App Pool for my app. I've been doing some testing with 1st visits and precompile performance and have been tracking when my application starts up and shuts down.
In my Global.asax I have some logging code in Application_Start and Application_End. I can see from my logs generally when the application is idle and shuts down, then someone visits and it starts back up.
But, I also see cases where a shutdown is logged and then followed by another shutdown about 13 minutes later; without a startup in the middle.
I also see instances where there are two Startups in a row. I'm guessing these might be a recycle, but why wouldn't there be a shutdown log entry?
What I'd really like to know if there is a better way to track when my application starts, when it shuts down and if it is shutdown due to an idle pool, or from a recycle. I don't have access to the Windows Event Log so I need to do this from my app if possible.
We have 64-bit Windows server and we need to explicitly enable the 32-bit mode in the Application Pool used by our web site, because the MS Jet Engine Data Provider used to import data from Excel does not run.
I am not sure, if we enable the 32-bit mode will we still get the advantage of 64-bit Server?
I am working on Windows 2008 Server (64-bit). I want to execute my web service as a pure (native) 64 bit service. All the assemblies referred by the web service are currently built as 'AnyCPU'.
When I publish the web service to IIS, and configure it to run under a 64-bit application pool (by setting 'Enable 32-Bit applications' = false), attempt to access the web service gives the error 'Application is not a valid Win32 application' because of a BadImageFormatException. This appears to indicate that somewhere an attempt is being made to load a 32 bit assembly. But the error does not provide any information about which assembly was found with an incorrect format. I have checked all the assemblies in the bin folder using corflags and they are bit agnostic.
I tried using the fusion log and identified a bind failure with VJSharpCodeProvider (though my service is coded only in C#). The runtime is not able to find the VJSharpCodeProvider because it is present in the GAC as an x86 assembly.
Is VJSharpCodeProvider the cause of the problem? I guess this is not the case because of the type of exception (BadImageFormatException). If I am correct, then how do I identify the assembly that is causing this exception?
If I change the property 'Enable 32-Bit applications' to true for the application pool, the service works fine, but I need native 64-bit execution.
I have a number of ASP.NET (4.0) web applications that appear to leak (a small amount) of memory during each request. It is such a small amount, that for most use-cases, it will not grow to become a problem for weeks or even months at a time. I generally try to be good with closing any connections managed by the application, avoiding state-variables (or instance variables for my singleton), etc. My question is this - is this normal behavior for ASP.NET applications? I had turned off the default (IIS 7) behavior of recycling the app pool after 20 minutes of being idle. I do this since the application takes a few minutes to build its internal cache, and I want to avoid negatively impacting the user experience (and having them wait for the application to start when they issue the request).
I'd like to describe strange issue I've noticed while analyzing my asp.net application in production and ask for some advice or opinion on the following matter.Application usually runs with some 80-90 MB of memory footprint. This seems stable since no memory leaks have been detected so far - no slight increase in memory usage over time. Yet, problem occurs when application pool recycles (I'm using shared hosting and judging by logs it occurs either when app is idle for 20 mins or every ~30 hours - something like that). The issue is that used memory almost doubles for some period on recycle - it goes to some 160-170 MBs without any explanation. This is confusing, since it is common claim that recycling should purge the memory and all other resources - at least I get it that way. System holds this amount of memory for some 7-8 hours and then memory usage drops to it's usual level of 90-100 MB, again, with no apparent reason (at least not know to me).
Does the same connection string used on two different physical servers hosting different web applications that talk to the same database draw connections from the same connection pool? Or are pooled connections confined to at the application level?
I ask because I inherited a 7 year old .NET 1.1 web application which is riddled with in-line SQL, unclosed and undisposed sql connection and datareader objects. Recently, I was tasked to write a small web app that is hosted on another server and talks to the same database and therefore used the same database connection string. I created a LINQ object to read and write the one table required by the app. Now the original .NET 1.1 app is throwing exceptions like
"Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached."
Maybe these are unreleated, but wanted to get your opinions to make sure I cover all my bases.
my web applications app pool configuration is PeriodicRestartMemory : 512000 PeriodicRestartPrivateMemory : 196608
although the virtual memory limit is higher than private memory, app pool is recycled with virtual memory limits exceeded errors in the event log (instead of private memory).
what is the reason for this? how could it exceed virtual memory limits before exceeding private memory limits? it seems that systems other allocations in virtual memory cause limits exceeded before applications private allocations exceed the limits, but what are those allocations of the system? or what is the root cause of this.
I have 2 different applications hosted on an IIS server. I have created a new application pool.Can i run both the applications on the same pool??Will sessions or other values of one application be available to the other application if I do it this way?
We migrated our web server to window server 2008, IIS 7.
We have single sign on application - that we login through one application called "users" and then no need to login to other applications, they all use the same machine key and cookie.
it works fine when all then applications under the same application pool.
but we have one application that is asp.net 2005. (the rest are asp.net 2003) the user application is in asp.net 2003 and that other application is in asp.net 2005.
so each application is in a different application pool. -
one pool to asp.net 1.1 and other pool to asp.net 2.
when I run the asp.net 2005 application
I get the login page and after I login I get the following errer:
HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.
Requested Url: /users/Unauthorised.aspx
Important: If I switch the "user" application (the login) to work under the same pool as my asp.net 2005 application, then it works fine with the asp.net 2005 application,but I get the above error for the asp.net 2003 applications
All this happened after we switched to IIS 7 Windows 2008, with IIS 6 it works great!
My WCF Service isnt restarting after the app pool recycles. I have no control over how often the pool is recycled (shared hosting) .How do I get the wcf service to restart on pool-recycle ?
exactly as the question subject states - any ideas on how you might do this?I've been looking over the objects in System.Web.Hosting but nothing is standing out. he reason? I'm getting one or two application errors which are typically occuring during a recycle (they happen about 25 hours apart and I've left my app pool recycle time at the default) and so I want to know if they're happening on a thread that's in the pool that's shutting down, or the one that's start(ed/ing) up.
I have several web applications on a server using the same application pool. The worker process usually takes a lot of ram but usually only from one application. I can successfully limit the cache usage by setting "PrivateBytesLimit" in web.config file when the application uses it own dedicated application pool.
Does anyone know how this setting will be applied when using shared application pool? Is it per application, per worker process or per application pool? Also if it is not per application which setting from which application will be applied?
