If you have ever performed website optimization then it is likely you have read this article here. This article discusses the impact of having the debug set to true in your production application. In another one of my blogs on C#, I made the comment once about “what is a technical blog without a comparison […]
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I was setting up a web farm with Web Farm Framework (WFF) and Application Request Router (ARR) and received the error shown in Figure 1/2. Figure 1, HTTP Error 502.3 – Bad Gateway Figure 2, HTTP Error 502.3 – Bad Gateway I checked the Monitoring and Management window to see if the Health Status of […]
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Sometimes when I execute: !runaway in WinDbg I receive the following error: ERROR: !runaway: extension exception 0x80004002. “Unable to get thread times – dumps may not have time information” The error message says it all, but how do you fix it. In my case ProcDump was used to create the dump and it appears that […]
Read More →I have written articles about how to capture a W3WP memory dump on Windows 2003 and Windows 2008. Once you have the memory dump, you need to analyze it to find out what is causing the problem. One command I use while analyzing a memory dump is !DumpThreadConfig or !dtc. Figure 1 shows the output […]
Read More →There are many reasons why an IIS worker process can hang. For example, a long running SQL query, searching through a Dictionary object, a non-optimal Regex command, hitting the limits of the process model configuration, etc… can all cause performance to slow. Previously, I wrote a blog about using the !dtc command in WinDbg. This […]
Read More →Not all IIS logging properties are selected by default. Some of them, which are not selected by default can provide some valuable information when troubleshooting performance or availability issues. To modify the properties which IIS 7 logs, first open IIS Manager, then select the top level server as show in Figure 1. Figure 1, display […]
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In continuation of a previous blog which compared 2 simple SELECT statements between NHibernate and Entity Framework, I do the same with the joining of 2 tables together. NHibernate Figure 1 shows the LINQ to NHibernate query which selects all the data from the PostForNHibernate table, joins with the BlogForNHibernate table using the foreign key […]
Read More →When you are troubleshooting IIS issues there are tools like Failed Request Tracing, IIS logs, etc. which will let you see what is going on. But what do you do when IIS itself is not working? A common cause is that the applicationHost.config file is corrupted. Perhaps there was a manual modification made to it […]
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With the release of Windows 8 Server comes a new version of PowerShell. You can check which version of PowerShell you are using by executing the command show in Figure 1. Figure 1, Which version of PowerShell am I using To get a list of application pools existing on the web server enter the following […]
Read More →Sometime things don’t always go as planned. I was making some nice progress with the process of mapping a database and all of a sudden I get the following compile time error message. Ambiguous type reference. A type named “Attribute” occurs in at least two namespaces. “Attribute” ist ein mehrdeutiger Verweis und kann “System.Attribute” oder […]
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