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Why doesn’t the GC kick in when the worker process is inactive?

I got the following question in my Getting started with windbg – post and I thought it might be worth posting the replies in a separate article: Hi Johan, about those threads with an ID of XXXX, should they go away after certain amount of idle time like Read More...
Posted Tuesday, May 13, 2008 3:39 PM by JohanS | 1 Comments

Walkthrough - Troubleshooting a native memory leak

Problem: A customer called in. They had a Web Service running on a single IIS6. Memory usage would slowly increase and not be released. As a workaround they'd currently set the application pool to recycle at 500 MB, causing a few failed requests upon Read More...
Posted Thursday, February 21, 2008 4:38 PM by JohanS | 16 Comments

Using WinDbg - Hunting Exceptions

Prerequisites This post will require some basic knowledge of windbg and the sos extension. For this I recommend looking at the following posts: Getting started with WinDbg - Part I Getting started with WinDbg - Part II For more information on Exceptions Read More...
Posted Thursday, January 31, 2008 5:39 PM by JohanS | 4 Comments

Using WinDbg - Advanced commands

Did you know you can build your own advanced commands using for each, if, etc? The complete list of control tokens are: .if .else .elseif .foreach .for .while .do .break .continue .catch .leave .printf .block Using these command tokes you can send quite Read More...
Posted Wednesday, January 23, 2008 3:46 PM by JohanS | 8 Comments

Getting started with windbg - part II

This is a continuation of my previous post with the imaginative name Getting started with windbg - part I . I'll be assuming that you've read it, so if you haven't I suggest you check it out first. We're still working with the same sample dump, so I'll Read More...
Posted Monday, November 26, 2007 2:49 PM by JohanS | 11 Comments

Getting started with windbg - part I

Okay, I've previously written some random posts about how to set up windbg and how to troubleshoot OutOfMemoryExceptions . I thought I'd take a few steps back and review some of the basics in order to help you get started on using this fantastic tool. Read More...
Posted Tuesday, November 13, 2007 3:20 PM by JohanS | 32 Comments

The standard output buffer-stuffer

I just closed a case that I thought was a bit interesting. I could skip directly to the old Problem, Resolution format, but I think that most of the time there is a lot to be learned from the troubleshooting process as well, so I'll simply describe the Read More...
Posted Wednesday, September 26, 2007 1:31 PM by JohanS | 1 Comments
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I am getting OutOfMemoryExceptions. How can I troubleshoot this?

Problem: You've written an ASP.NET application that is getting OutOfMemoryExceptions. Cause: Let's find out... Resolution: Use Windbg to take a look at the heap. Is it a leak? Take a look at the memory usage of you application using perfmon. If memory Read More...
Posted Thursday, January 11, 2007 5:46 PM by JohanS | 11 Comments
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How to install Windbg and get your first memory dump

Install Windbg Windbg is the tool for the ASP.NET support engineer. It is free and it's available at www.microsoft.com/whdc/devtools/debugging/default.mspx . The learning curve is steep to say the least, but if you're interested in finding out what is Read More...
Posted Thursday, January 11, 2007 5:42 PM by JohanS | 9 Comments
 
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