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Azure, IIS, ASP.NET, and LeanSentry

LeanSentry

Fixing W3WP.exe memory leaks is easier than you think

April 5, 2022 by mvolo Leave a Comment

Memory leaks can be causing poor website performance, and blowing out your cloud hosting costs.



You can now easily reduce memory usage and fix memory leaks, check out our Diagnose w3wp.exe memory usage guide for the step by step!

Posted in: .NET, ASP.NET, How-To, IIS, LeanSentry, Performance Tagged: ASP.NET, Azure, Guides, How-To, LeanSentry, Memory, Performance, Troubleshooting

You may be massively overpaying for your CPUs

February 23, 2022 by mvolo Leave a Comment

You could be throwing away 50-80% of your cloud instance CPU power, due to common .NET CPU overheads.

Learn more about these and how to remove them to save on your cloud costs in our W3wp high CPU guide.

Posted in: .NET, ASP.NET, How-To, IIS, LeanSentry, Performance, Uncategorized Tagged: ASP.NET, Azure, CPU, Guides, LeanSentry, Performance

New guide to IIS and asp.net hangs

February 8, 2022 by mvolo Leave a Comment

To commemorate over 10 years of LeanSentry Hang diagnostics, we wrote an updated guide to resolving IIS and ASP.NET hangs.

Get the step-by-step guide at Diagnose IIS website hangs.

Posted in: .NET, How-To, IIS, LeanSentry Tagged: ASP.NET, Guides, How-To, IIS, LeanSentry, Troubleshooting

The master guide to proactive IIS monitoring

January 11, 2022 by mvolo Leave a Comment

Tired of monitoring dozens of metrics that produce no actionable value, and then still struggling with website outages?

After 10 years of solving IIS performance problems at LeanSentry, we’ve developed a practical model for tuning IIS website performance. Get the full system in our new IIS monitoring guide.

Posted in: .NET, How-To, IIS, LeanSentry, Performance, Troubleshooting Tagged: ASP.NET, Guides, IIS, LeanSentry, Performance, Troubleshooting

How-To: Remove slow Azure instances

June 3, 2015 by mvolo 2 Comments

In case you missed it, LeanSentry How-To last week was about removing slow or unhealthy Azure instances from your cloud service. It’s a relatively new technique made possible by a new Azure API, that lets you remove a specific instance of your choosing. Direct link: LeanSentry How-To: Remove unhealthy or slow Azure instances Reasons to … [Read more…]

Posted in: .NET, Azure, How-To, IIS Tagged: ASP.NET, Azure, How-To, IIS, LeanSentry

New Hang diagnostics for IIS & ASP.NET apps

May 6, 2015 by mvolo 2 Comments

LeanSentry’s new Hang diagnostics are out! This was a major rewrite of the diagnostic algorithm, and a complete redesign of the interface. Some of the biggest changes are …

Posted in: ASP.NET, IIS, LeanSentry, Troubleshooting Tagged: ASP.NET, IIS, LeanSentry, Troubleshooting

Re-inventing LeanSentry

April 13, 2015 by mvolo Leave a Comment

Hard to believe its been more than a year since my last post! I get a lot of “Hey Mike, what have you been up to?” email from this blog and the IIS troubleshooting newsletter, so I figured I should answer this question before getting back to business as usual. The short answer is, I’ve … [Read more…]

Posted in: ASP.NET, IIS, LeanSentry, Personal, Troubleshooting Tagged: ASP.NET, IIS, LeanSentry

Let's fix production troubleshooting

September 17, 2013 by mvolo Leave a Comment

Production troubleshooting sucks. With LeanSentry, our vision has been to fix how IT and developers deal with production troubleshooting.

Today, this vision is getting even closer to being reality with automatic diagnostics for IIS website hangs, ASP.NET memory leaks, and many others.

Posted in: ASP.NET, CodeProject, IIS, LeanSentry, Troubleshooting Tagged: ASP.NET, IIS, LeanSentry, Troubleshooting

Crack down on 404 errors in your web apps

July 2, 2013 by mvolo 7 Comments

404 Not Found is the most common error for production web applications. Turns out, they can often signal real production problems! Read on to learn about 4 types of Not Found errors you should find and fix ASAP.

Posted in: ASP.NET, CodeProject, IIS, LeanSentry, Troubleshooting Tagged: ASP.NET, IIS, LeanSentry, Troubleshooting

LeanSentry: TechEd 2013 wrapup

June 17, 2013 by mvolo Leave a Comment

Last week, we attended TechEd 2013 in New Orleans, and showed off LeanSentry to a crowd of Microsoft IT folks and developers. The reception was awesome! Here is the wrapup.

Posted in: ASP.NET, CodeProject, IIS, LeanSentry, TechEd, Troubleshooting Tagged: IIS, LeanSentry, TechEd, Troubleshooting
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About me

I am the lead developer for LeanSentry, an expert application monitoring service for .NET web apps.

Before that, I used to work for Microsoft where I helped build the IIS 7.0 and ASP.NET products.

Expert IIS and .NET performance guides

  • How to reset and restart IIS correctly.
  • Get the best IIS application pool availability with warmup.
  • Turn on richer IIS logs for IIS log analysis on steroids.
  • Fix 503 queue full errors and improve RPS by tuning the IIS thread pool.
  • Tune high CPU usage in w3wp.exe.
  • Fix .NET memory leaks and tune w3wp memory usage.
  • Fix IIS and ASP.NET hangs, and async await hangs in ASP.NET core, MVC and WebAPI.

Recent Posts

  • Fixing W3WP.exe memory leaks is easier than you think
  • Async await hangs in ASP.NET Core, MVC and WebAPI
  • You may be massively overpaying for your CPUs
  • New guide to IIS and asp.net hangs
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