![]() Almost zero impact can be measured in your app while taking snapshots. This snapshot takes 10-20 milliseconds to capture and consumes a few hundred kilobytes of memory on your server. Snappoints take a full process snapshot of your app when the line you specify executes. The app is still running: end users will have no idea you are currently debugging. You can open this Snapshot from the Diagnostic Tools Window to view the Call Stack, Locals, and Watches, as well as evaluate expressions, at the point of time when the snapshot was taken. When your app executes the line containing the Snappoint, a snapshot will be taken. You can then click the Start Collection or Update Collection button to turn on Snappoints placed in your app. You can place a Snappoint in your code exactly like you would a breakpoint: by clicking the breakpoint gutter on the line you are interested in debugging or by pressing F9. You can also add conditions to Snappoints to only capture information on interesting or problematic requests to your app. call stack, objects on the heap), and continue execution. Unlike breakpoints, they do not halt your app: instead, they take a snapshot of relevant info (i.e. Snappoints bring breakpoint-style local debugging to a cloud scale. You can then right click your Azure App Service in the Cloud Explorer inside Visual Studio and Attach Snapshot Debugger. Secure access to production data: only resource admins can debugĬurrently, the Snapshot Debugger preview works for ASP.NET and ASP.NET Core apps running on Azure App Service (additional platform support will be announced in the next few months).Support debugging highly distributed apps running on multiple servers.Retain the functionality and ease of local debugging.The Snapshot Debugger follows a few key principles: You can use the Snapshot Debugger to debug production issues directly in production as they happen. The Snapshot Debugger extends the Visual Studio debugger you know and love to debug apps running at scale in Azure. It’s not clear what steps a customer took to run into the issueĭue to these challenges, fixing a production issue can feel a little like this:.Logs may not contain enough details of the issue.Issues may not repro locally (due to intricacies in production data, scale, or config). ![]() There’s several challenges that can make diagnosing the root cause of production issues costly: Quickly diagnosing and fixing production issues is one of the hardest tasks you may face while developing cloud scale apps. Note: the Snapshot Debugger is currently preview software – please use it in a testing or staging deployment of your app. The Snapshot Debugger is currently in preview for ASP.NET apps running on Azure App Services – try it out. We previously released functionality to automatically capture snapshots when your app runs into problems, now you have more fine-grained control to debug your production app with two new features in Visual Studio: Snappoints and Logpoints. At Build, we introduced the Snapshot Debugger: a new tool that enables you to debug production environments in Azure with minimal impact. The Snapshot Debugger enables you to get to the root cause of the “but it worked locally!” production issues with ease.
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