![]() ![]() Any external or third party handlers, modules fall in this category. Application Code - represents the time spent in handlers or modules that get invoked either while executing application code (for e.g ManagedPipelineHandler) or those that are closely related to any explicit configuration done for the application (for e.g.It also breaks down the time spent in various modules of request execution in IIS and tries to categorize them in to Platform, Network and Application code to give you a quick indication on where the problem might be. This view shows you the top 100 slowest requests that got captured in the trace. The trace file section also has a link to download the trace file.įor troubleshooting slow or slow or hung web applications, click on Slow Requests tab. This can be used to validate if the trace is useful and if the right set of requests got captured in the trace and if the cause of slowness is related to high CPU on the instance serving the web app or not. The analysis report provides some basic information about the number of requests captured, successful and failed requests, CPU usage of the instance, CPU usage of the web app and request execution information that helps you identify how fast your Web App was responding when the trace was getting captured. After the analysis finishes, a link to view the profiler report for every instance serving the web app is generated and you click on the Open Report button to view the Analysis report. It is important to note that the profiler trace only has information about the requests that were captured in these 60 seconds (It is possible to increase this duration as mentioned below in this article)Īfter 60 seconds, the profiler automatically stops, and an analysis component gets triggered that starts analyzing the profiler trace that just got captured. The default duration for which the profiler trace runs is 60 seconds and during this 60 seconds, all the requests that were made to the Web App get captured in the profiler trace. If you have a Web App running on multiple instances, make sure to browse a few more times to ensure that the requests to the web app get captured in the profiler trace. Once the profiler trace is started, reproduce the issue by browsing the Web App. This will pause your process for a few seconds until the thread dump is generated. This option is NOT recommended if you are experiencing high CPU on the instance because if the instance is under stress, it might take a long time to even start a new process to collect the thread dumps.Ĭlicking the Collect Profiler Trace will start profiling the Web App and the wizard will show progress of various steps involved. This is useful especially if you are troubleshooting totally hung processes, deadlocks or requests taking more than 60 seconds. Unless you have isolated that only a specific instance is failing, it is best to just select all the instances on which your Web App is running.Īdd thread report option - With this option enabled, a thread report of all the threads in the process is also collected at the end of the profiler trace. NET Profiler Trace option under Diagnostic Tools option and click on Collect Profiler Trace. To collect the trace, go to Diagnose and Solve Problems and choose the Collect. The profiler works for both ASP.NET and ASP.NET core applications. You can use this tool to efficiently troubleshoot delays which are relatively small (less than a second too) without impacting the run-time performance of the application. The captured trace has ETW events emitted by the IIS and the ASP.NET providers along with stack traces captured at the CPU level. In fact, the web app is not even restarted as a result of capturing this trace. ![]() It should be noted that no changes are made to your Web App code or your configuration during the collection or the analysis phase. The analysis component of the profiler uses the TraceEvent library to generate a report that helps you drill down in to the problems in matter of a few minutes. Profiling is designed for production scenarios and is based on ETW (Event tracing for Windows). It is extremely useful in situations where the problem is happening right now and you want to collect some data to identify the root cause of the issue. NET exceptions, time taken in the various request processing pipeline stages and even lets you drill down into exact methods within the application code that are taking time. Profiler tool helps in collecting an on-demand trace that lets you identify the underlying. NET Profiler Trace option in detail and how you can use it to troubleshoot a slow or a failing ASP.NET based Web App. In this post, we are going to cover the Collect. The Diagnostic Tools options under the Diagnose and Solve blade for Azure App Services has been live for a few months now and has many tools that help you troubleshoot apps based on their application stack. ![]()
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