Low Pagefile can cause 503 Service Unavailable on Azure web roles
Is your Azure web role throwing 503 Service Unavailable? It could be because of a poor default Pagefile size.
IIS
New Hang diagnostics for IIS & ASP.NET apps
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 …
Re-inventing LeanSentry
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…]
Infographic: Debugger vs. Profiler? Fixing slow ASP.NET page loads
We put together a fun infographic to compare using the debugger vs. a profiler for troubleshooting slow page loads in ASP.NET apps. This coincides with our recent release of LeanSentry’s slow operation tracking, which provides an lighter (and more informative) alternative to either. Here it is: What do you use currently? Do you agree with … [Read more…]
IIS hang troubleshooting guide
Want to learn how to troubleshoot IIS website hangs the way Microsoft developers do it? Check out the new IIS hang troubleshooting guide.
Let's fix production troubleshooting
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.
Everything you ever wanted to know about ASP.NET request queues
Did you know there are 5 places where ASP.NET requests can become queued on an IIS server? Learn all about these queues, and how to identify the actual queued requests!
The 4 server logs you NEED to know to fix any IIS / ASP.NET error
Having trouble finding that IIS or ASP.NET error in production? Learn to use these 4 server logs, and you will always find the error you are looking for.
Fix the 3 silent performance killers for IIS / ASP.NET apps
If you could double your IIS/ASP.NET application performance by making just a few small tweaks, would you do it? Here are 3 high CPU problems for ASP.NET applications, that also happen to be easy to find and fix.
Crack down on 404 errors in your web apps
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.