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Using VSTS Test and Profilers to troubleshoot performance issues (low cpu hang)

Posted Wednesday, October 01, 2008 5:01 PM by Tess
I’ve been wanting to dig into the Test features in Visual Studio Team System for a while to “debug” issues during the test phase.  In my previous post I linked to a Swedish screen cast by Mikael Deurell, but for those of you who don’t know Swedish Read More...
4 Comments

Swedish Screen casts of debugging labs and visual studio test

Posted Tuesday, September 30, 2008 1:12 PM by Tess
I know that perhaps not that many of you know Swedish, but for those of you who do, you might want to check out Michael Deurell’s nice screen casts about how to use visual studio test system to troubleshoot the issues in the buggybits labs along with Read More...
3 Comments

Making it easier to debug .net dumps in windbg using .cmdtree

Posted Thursday, September 18, 2008 11:20 AM by Tess
John Robbins beat me to the punch and wrote an excellent post about using .cmdtree in windbg to ease some .net debugging pain in windbg. The windbg .cmdtree command allows you to create a popup window in windbg with commands that execute when you click Read More...
9 Comments

Q&A Reader emails about .NET memory leaks and random questions

Posted Tuesday, September 16, 2008 1:36 PM by Tess
Here are of some of the reader emails I got this week and my answers to them... How do I troubleshoot this memory leak Debugging techniques for capturing stacks of OOMS Do you have a list of Debugging 101 links? Debugging managed code in IE Getting to Read More...
9 Comments

ASP.NET Memory Issues - High Memory Usage with AjaxPro (fixed in current version)

Posted Friday, September 12, 2008 3:21 PM by Tess
I was helping a colleague out with an OOM (OutOfMemory) situation he was dealing with. Problem description: Their applications memory usage would grow over time until they finally ended up with an out of memory exception. First debug: They had gotten Read More...
4 Comments

Quick Debugging Tip: Disable apppool recyling while getting crash dumps

Posted Friday, September 12, 2008 10:40 AM by Tess
I have probably mentioned this before, but I think it is worth mentioning again because of the frequency of this issue. When debugging a crash, we usually get customers to use a crash rule in debug diag or to use adplus -crash to get memory dumps at the Read More...
3 Comments

ASP.NET Memory - Identifying pages with high Viewstate

Posted Tuesday, September 09, 2008 2:56 PM by Tess
From time to time we get issues with high memory and performance issues due to massive viewstate. I have talked about it before here , but I thought I'd show some techniques for finding out which pages have high viewstate. If you look at a memroy dump Read More...
8 Comments

OutOfMemoryExceptions while remoting very large datasets

Posted Tuesday, September 02, 2008 2:41 PM by Tess
When you have to pass an object back and forth between processes or application domains you have to serialize it into some type of stream that can be understood by both the client and the server.   The more complex and big the object gets the Read More...
8 Comments

Debugging Puzzler - WinForms crash - Can you figure out what caused it?

Posted Wednesday, August 27, 2008 1:48 PM by Tess
Earlier this week I was doing a presentation and since the company I presented for had mostly winforms developers I wanted to convert all my ASP.NET debugging demos to winforms equivalents for the presentation. As I was converting my first demo (a performance Read More...
16 Comments
Attachment(s): DebuggingPuzzler1.exe

Debugging Silverlight applications with windbg and sos.dll

Posted Thursday, August 21, 2008 11:51 AM by Tess
If you have hangs, performance, memory issues, exceptions or crashes in Silverlight applications you can debug them using windbg and sos just like you would if the issues occurred in other .net applications.  The difference is that Silverlight in Read More...
8 Comments

Troubleshooting a performance issue with Failed Request Tracing and appcmd in IIS7

Posted Tuesday, August 19, 2008 8:26 AM by Tess
I know I'm a little late in the game, but I decided that after vacation it was finally time for me to install Windows 2008 on my Vista box and play around with some of the IIS 7 features like Failed Request Tracing (known as FRT or FREB) and the appcmd Read More...
7 Comments

ASP.NET Memory Leak: Byte arrays rooted in System.Security.Policy.Evidence

Posted Wednesday, June 25, 2008 4:04 PM by Tess
Today I got a question from a reader (Chris) about a memory leak they are seeing in their application When we do a '!dumpheap -min 85000 -type Byte[]' we can see 100s of byte array objects using up ~545MB of memory. A majority of the objects are the same Read More...
3 Comments

100% CPU in vbc.exe when compiling large vb.net web applications in Microsoft Visual Studio 2008

Posted Monday, June 23, 2008 12:52 PM by Tess
We just released a hotfix for an issue where you get 100% CPU in vbc.exe when compiling large applications in Microsoft Visual Studio 2008. Apart from the 100% CPU situation you may also notice symptoms like visual studio taking a very long time to return Read More...
14 Comments

Presenting at TechEd Developers Europe 2008, Barcelona

Posted Friday, June 13, 2008 10:14 AM by Tess
Save the date!  TechEd Developers North America 2008 just finished but there is plenty more to come... I know it's a bit early still, but November 10th through 14th TechEd Developer 2008 is coming to Barcelona, Spain and the session list is already Read More...
0 Comments
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ASP.NET Case Study: Deadlock waiting in GetToSTA

Posted Thursday, June 12, 2008 11:44 AM by Tess
This is an issue I come across once in a while and since I am not a COM expert by any means I actually had to check in with our COM guys to see what was going on in this case, and as it turned out (this is embarrassing:)) I had already written about the Read More...
5 Comments
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