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Debug Diag: mscorwks.dll is responsible for 372.46 MBytes worth of outstanding allocations

Posted Friday, October 09, 2009 2:56 PM by Tess
I got an email today on an issue that I think is pretty common when you try to memory leak analysis on a dump with debug diag . They had set up a leak rule in debug diag to monitor for leaks and then ran the memory analysis on it to see what was leaking Read More...
3 Comments

Finding memory leaks with ANTS Memory Profiler

Posted Wednesday, October 07, 2009 1:05 PM by Tess
I was out looking for some sample scripts for tinyget and ran across this ANTS Memory Profiler review where Scott Seely has tested it out on some of my debugging labs . I haven’t had the time and/or opportunity to test it out myself but since many people Read More...
2 Comments

First step in troubleshooting complex issues: Define and scope your issue properly

Posted Wednesday, September 09, 2009 1:21 PM by Tess
Is it a plane, is it a bird, is it a UFO? Before you can delve into any kind of troubleshooting of an issue you need to thoroughly define it.  If you don’t you’ll probably end up spending a lot of time randomly gathering and looking at data that Read More...
8 Comments

Why do I see ExecutionEngineException, StackOverflowException and OutOfMemoryException on the heap when debugging .net applications?

Posted Monday, August 10, 2009 2:30 PM by Tess
I came back from a long vacation today and I’ve finally caught up with enough emails to do something useful with my day. As I scanned through my blog email bucket I noticed that I had a lot of emails relating to my last post on dumping .net exceptions Read More...
5 Comments

Background Garbage Collection in CLR 4.0

Posted Friday, May 29, 2009 1:23 PM by Tess
Yesterday I found this really nice Channel 9 interview with Maoni Stephens (Dev Owner of the CLR GC) and Andrew Pardoe (Program manager for the CLR GC) where they talked about the new Background GC in CLR 4.0. She also talks about it here and there is Read More...
8 Comments
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Debug Diag script for troubleshooting .NET 2.0 Memory leaks

Posted Tuesday, May 12, 2009 11:53 AM by Tess
I have put together a quick and dirty debug diag script for troubleshooting .net memory leaks. (attached to this post) The reason I put it together was mainly to show how you can create your own debug diag scripts but feel free to use it to troubleshoot Read More...
20 Comments
Attachment(s): DotNetMemoryAnalysis.zip

Show me the memory: Tool for visualizing virtual memory usage and GC heap usage.

Posted Thursday, April 23, 2009 10:43 AM by Tess
A colleague of mine, John Allen, created an awesome tool way back that displays memory usage in a process very nicely. I use screenshots from it from time to time in presentations or posts but unfortunately that tool is not publicly available. Since lots Read More...
17 Comments
Attachment(s): MemoryDisplay32Bit.zip

Developers are from Mars, Ops people are from Venus… or It looked good on paper

Posted Friday, April 03, 2009 3:54 PM by Tess
A few weeks back me and Micke (one of our Architect Evangelists) had a session at TechDays where we talked about “things that looked good on paper” i.e. things that sound pretty ok in the design/development phase but sometimes turn out to be a disaster Read More...
19 Comments

.NET Rocks: Debugging chat

Posted Tuesday, March 10, 2009 3:53 PM by Tess
Yesterday I had a nice chat with Richard and Carl at .NET Rocks . We talked about .net, debugging, memory issues and a bunch of other stuff, and in the end I got a pop quiz that I failed:) See if you can figure out what caused the outage on their servers… Read More...
11 Comments

.NET Memory Leak reader email: Are you really “leaking” .net memory

Posted Friday, February 27, 2009 1:16 PM by Tess
I get several emails every week through the blog asking for help on various issues.  Unfortunately due to time constraints I can’t really look at them all on an individual bases but I thought this particular request might be interesting to share. Read More...
6 Comments

.NET Memory Leak: To dispose or not to dispose, that’s the 1 GB question

Posted Tuesday, February 03, 2009 1:26 PM by Tess
I was looking at a memory dump recently for an issue where the process would grow to over 1 GB and return OutOfMemory Exceptions. Debugging the issue: A full user dump of the w3wp.exe process was taken with debug diag 1.1 when memory was really high. Read More...
30 Comments

Video of my TechEd presentation of Common Issues in ASP.NET and how to debug them with Windbg

Posted Thursday, November 27, 2008 4:25 PM by Tess
My TechEd presentation “Common Issues in ASP.NET and how to debug them with Windbg” is now up on channel 9, so if you want to watch it, here you go http://channel9.msdn.com/posts/MSDNSweden/Vanliga-fel-som-grs-med-ASPNET-och-hur-du-hittar-dem-med-WinDbg/ Read More...
9 Comments

Debugging memory leaks in Compact Framework / Windows CE applications

Posted Tuesday, November 25, 2008 10:35 AM by Tess
This is way out of the scope of what I normally troubleshoot, but I have gotten some questions around this and I just wanted to point out a really good resource (By Raffaele Limosani), for troubleshooting memory leaks in these kind of applications. http://blogs.msdn.com/raffael/archive/2008/02/21/netcf-memory-leak-now-what.asp Read More...
2 Comments

Slides for interactive TechEd Sessions about debugging .net issues in windbg

Posted Friday, November 21, 2008 10:37 AM by Tess
... and here are the slides for the interactive session Read More...
2 Comments
Attachment(s): Debugging Performance Issues, Memory Issues and Crashes in .net Applications-rev.pptx

Slides and resources for TechED presentations about debugging .NET issues with Windbg

Posted Friday, November 21, 2008 10:32 AM by Tess
I still have to figure out a way to host the video from the break-out session but until then, here are the slides for my presentations (attached). And here are a list of some of the tools and resources I used for the presentations Tool/Resource Comment Read More...
8 Comments
Attachment(s): Common ASP.NET Production Issues-rev.pptx
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