What are the best metrics and tools for monitoring and analyzing web application performance using IIS?

KPIs should reflect the business as well as the internal and external end users. We need to measure the business impact of performance issues: a slow down when there are no users is not as bad as a slow down during peak usage. The user experience of (web) applications and services are critical, as they will impact the usage of those applications or services.

Your business goals: Align your KPIs with your overall business objectives. For example, if your goal is to increase sales, you might focus on conversion rate and average order value. Your target audience: Consider the needs and expectations of your users when choosing KPIs. For example, if your target audience is mobile-first, you might prioritize mobile-specific KPIs like app download rate and session length. Your resources: Choose KPIs that you can realistically track and measure with the resources available to you. By monitoring and analyzing your web application KPIs, you can gain valuable insights into its performance and identify areas for improvement.

Best tools are - Solarwinds - Newrelic - AppDynamics - Dynatrace - Site 24x KPI are memory leakage, number of worker processes, start/stop actions, session monitoring for cached/failed/queued requests, Application pool monitoring, memory, processor etc

Solarwinds is the most well known and has a lot of contractor support, however depending on your specific KPIs, and you have in-house talent you could blend some open source solutions or build your own. It's just log data in the end so with the right SMEs from a data and coding perspective and clear KPIs, just build it. However, Solarwinds is sort of the easy button.

When choosing a tool, consider the following factors: Your budget: Open-source tools are free to use, while commercial tools can be expensive. Your technical expertise: Some tools are easier to use than others. Your data sources: Make sure the tool you choose can collect data from the sources you need. Your visualization needs: Some tools offer more sophisticated visualization options than others.

Minimize HTTP requests: Combine CSS and JavaScript files, use sprites for icons, and leverage browser caching to reduce the number of server requests. Optimize images: Resize, compress, and choose the appropriate image format to decrease their size without sacrificing quality. Optimize code: Minify HTML, CSS, and JavaScript to remove unnecessary whitespace and comments. Lazy load content: Load content below the fold only when the user scrolls down, prioritizing above-the-fold content for faster initial render. Preload critical resources: Use preconnect, preload, and dns-prefetch directives to pre-load critical resources like fonts and scripts, speeding up rendering.

ptimizing web app performance is an ongoing process. By continuously monitoring, analyzing, and implementing these tips, you can ensure your app delivers a fast and enjoyable experience for your users.