.NET Blog

Free. Cross-platform. Open source. A developer platform for building all your apps.

performance - .NET Blog

Public alias to report performance issues with VWD 2008

April 24, 2008 Apr 24, 2008 04/24/08
Web Development Tools Microsoft
As a part of creating a way for customers to directly communicate with the product team and get help if they are running into performance issues in Visual Web Developer 2008 or web-related features in Visual Studio 2008, the product team has created a public alias to report all performance related concerns about the product. The alias is ...

64-bit vs 32-bit

May 15, 2007 May 15, 2007 05/15/07
maoni
As 64-bit machines become more common, the problems we need to solve also evolve. In this post I’d like to talk about what it means for the GC and the applications’ memory usage when we move from 32-bit to 64-bit.   One big limitation of 32-bit is the virtual memory address space - as a user mode process you get 2GB, and if you use ...

Difference Between Perf Data Reported by Different Tools – 4

January 12, 2007 Jan 12, 2007 01/12/07
maoni
.NET CLR Memory\% Time in GC counter and !runaway on thread(s) doing GC. The 2 common ways people use to look at the time spent in GC are the % Time in GC performance counter under .NET CLR Memory, and the CPU time displayed by the !runaway debugger command in cdb/windbg. What do they mean exactly? % Time in GC is calculated like this: When ...

Difference Between Perf Data Reported by Different Tools – 3

December 20, 2006 Dec 20, 2006 12/20/06
maoni
Both the !SOS.gchandles command (added in CLR 2.0) and the .NET CLR Memory\# GC Handles counter show you the number of GC handles you have in your process. The # GC Handles counter is one of the rare counters in the .NET CLR Memory category that doesn’t get updated at the end of each GC. Rather we update it in the handle table code, for ...

Difference Between Perf Data Reported by Different Tools – 1

December 12, 2006 Dec 12, 2006 12/12/06
maoni
So, there are many perf tools and some of them report either the same or the same type of data. I want to talk about various differences between the ones related to managed heap investigation. This is not supposed to cover everything..just the ones I think people use frequently. Managed Heap Size We have both .NET CLR Memory perf counters and ...

My application seems to hang. What do I do? – Part 2

November 14, 2006 Nov 14, 2006 11/14/06
maoni
Last time I talked about the hang scenario where your process is taking 0 CPU and the CPU is taking by other process(es) on the same machine.   The next scenario is your process is taking 0 CPU and the CPU is barely used by other processes.   As one of the readers correctly pointed out, this is very likely because you have a ...

New MSDN Article – Investigating Memory Issues

October 23, 2006 Oct 23, 2006 10/23/06
maoni
We have a new MSDN article out in the November issue that talks about investigating managed memory issues. http://msdn.microsoft.com/msdnmag/issues/06/11/CLRInsideOut/default.aspx?loc=en Take a look and let me know what you think. Oh, and it's also in 6 other languages (German, Spanish, French, Russian, Portuguese and Chinese) ...

My application seems to hang. What do I do? – Part 1

September 28, 2006 Sep 28, 2006 09/28/06
maoni
Defining “hang” is a good place to start.   When people say “hang” they could mean all sorts of things. When I say “hang” I mean the process is not making progress – the threads in the process are either blocked (eg. deadlocked, or not scheduled because of threads from other processes) or executing code (madly) but not doing...

Understand the problem before you try to find a solution

September 1, 2006 Sep 1, 2006 09/1/06
maoni
So far I’ve never written a blog entry that gives out philosophical advices on doing performance work. But lately I thought perhaps it’s time to write such an entry because I’ve seen enough people who looked really hard at some performance counters (often not correct ones) or some other data and asked tons of questions such as “is this...

When memory is running low…

June 6, 2006 Jun 6, 2006 06/6/06
maoni
When I say memory I mean physical memory. Let’s assume that you have enough virtual memory space. When the physical memory gets low you may start getting OOMs or start paging. You can experiment and see how you can avoid getting into the low memory situation but sometimes it’s hard to predict and hard to test all scenarios your app can get...