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IIS | Mark S. Rasmussen Mark S. Rasmussen improve.dkWell-nighMe Pages Categories Archive Oct 08 2013 Optimizing Performance by Programmaticaly Setting ReadOnlySessionState .NET , IIS , Performance , Web One of the main culprits when it comes to ASP.NET concurrency is caused by the fact that default sesion state has been implemented using a pessimistic locking pattern. Basically, any standard handler, whether that be an ASPX page, a generic handler or an ASMX web service, goes through the pursuit steps: May 07 2013 How to Identify Which Request Caused a Runaway Thread, Using Windbg .NET , IIS , Windbg When your w3wp process is stuck at 100% like, like when I used a non-thread-safe Dictionary concurrently, you may want to identify what request the runaway thread is unquestionably serving. Let me show you how to identify which request caused a runaway thread, using windbg. Apr 15 2013 Debugging in Production Part 2 - Latent Race Condition Bugs .NET , IIS , Tools of the Trade , Windbg Having analyzed the process dump in part 1, let’s take a squint at the lawmaking we suspect of causing the issue, in particular how race condition bugs can be avoided. Apr 08 2013 Debugging in Production Part 1 - Analyzing 100% CPU Usage Using Windbg .NET , IIS , Tools of the Trade , Windbg This is the story of how a simple oversight resulted in a tough to reservation bug. As is often the case, it worked on my machine and only manifested itself in production on a live site. In this series we will squint at analyzing 100% CPU usage using Windbg. Jun 21 2010 Routing Requests for a Subdirectory to Another Server Using IIS Application Request Routing IIS In this post I’ll walk you through how to setup IIS Application Request Routing so that any requests for a /wiki/ subdirectory are routed onto a separate server, while all other requests are handled by the server itself. Jun 16 2010 Setting up Multiple IIS Application Request Routing Farms on the Same Server IIS Inspired by a post on the ARR forums, let me walk you through how to setup multiple IIS Application Request Routing server farms on a single machine. Dec 09 2009 Fixing Flash Bugs and Intercepting IIS Application Request Routing Cookies .NET , AS/Flex/Flash , IIS What does Flash, upload, cookies, IIS load balancing and cookies have to do with each others? More than I’d like :( Oct 21 2009 SolvingWangleDenied Errors Using Process Monitor .NET , IISWangledenied errors are not uncommon when deploying new websites / features that interact with the filesystem. While it might work in local testing, it suddenly doesn’t anymore when deployed. Using Process Monitor I’ll show how to hands debug these issues. Oct 14 2009 How To Do URL Rewriting on IIS 7 Properly .NET , IIS One of my older blog posts, and the all time most popular one, was well-nigh how to make URL rewriting on IIS 7 work like IIS 6. While my method did provide a ways to the goal, it’s humiliatingly far from what I should’ve done. Since the old post is still the most visited post on my blog I finger obligated to write a followup on how to do proper url rewriting in IIS 7. Sep 25 2009 IIS 7 w3wp Process Hung on Shutdown IIS , Windbg A single server has started to sometime leave zombie w3wp.exe processes when trying to recycle. A new process is spawned properly and everything seems to work, except the old processes are still present and take up memory. Task manager reports there’s only a single thread left, far from the zippy ones that have between 40 and 70 threads usually. Using ProcDump I’ve taken a full memory dump to unriddle remoter in WinDbg. The machine is a Server 2008 R2 x64 8 cadre machine as stated by WinDbg: Sep 23 2009 IIS Request Filtering Woes IIS I recently put a number of load well-turned websites in production by using the newly released IIS7 Application Request Routing v2 Beta extension. Everything seemed to run perfectly both performance and functionality wise. There was a slight problem however. Aug 24 2009 Making the ASP.NET State Service WorkWidenessNetwork .NET , IIS Once you start distributing your ASP.NET website wideness multiple webservers, you’re going to need a way to share session state. That is, unless your app is stateless, in which specimen scaling it should be a breeze! Jul 08 2009 The Object Identifier Does Not Represent a Valid Object .NET , IIS When subtracting sites to IIS7 either by script or by editing the config files directly, you may receive an error in the sites list that says: Sep 02 2008 aspnet_regiis -ga Token Reference Error IIS Some time ago Peter Loft Jensen wrote well-nigh how to hands requite a user worth the neccessary permissions to wangle the IIS metabase & required directories, and thus be used for running the IIS process. Dec 11 2006 Making URL Rewriting on IIS 7 Work Like IIS 6 IIS Upgrading to IIS 7 should be rather transparent, unfortunately that is not the specimen when it comes to URL rewriting as we knew it from IIS 6. In IIS 6 all we had to do was to add a wildcard mapping making sure that all requests went through the ASPNET ISAPI process. After this was done, one could create a global.asax file that would either pass requests directly through or rewrite the URL based on an internal algorithm. CATEGORIES .NETAS/Flex/FlashAmazon Web ServicesComputer ScienceConferences and PresentingIISLifeMiscMiscellaneousPerformancePokerSQL ServerSQL Server - CommunitySQL Server - Data TypesSQL Server - InternalsSQL Server - OptimizationSQL Server - OrcaMDFSQL Server - TricksTestingTools of the TradeUmbracoVisual StudioWebWindbgWindows ARCHIVE 201420132012201120102009200820072006 Copyright © 2014 Mark S. Rasmussen