GC Performance Counters

Maoni and GC Performance Counters

Sam Gentile's Blog — Fri, 04 Jun 2004 01:52:00 GMT

re: GC Performance Counters

Paul Wilson — Fri, 04 Jun 2004 00:47:00 GMT

Great information. Now if only you guys can get all the "total/global" bytes counters to actually be for all .net processes as documented, instead of just for the very last particular sample of one of the .net processes!

Yet another CLR perf blogger...

Brad Abrams — Fri, 04 Jun 2004 07:04:00 GMT

re: GC Performance Counters

Matt — Fri, 04 Jun 2004 12:46:00 GMT

Might be an idea to talk a little about PerfMon counters and Multi-CPU machines - in particular .NET V1.1 and %Time in GC...

re: GC Performance Counters

J. Ambrose Little — Mon, 07 Jun 2004 15:24:00 GMT

Thanks for this. I was a bit concerned about high allocation rate in one of my apps, but they're all Gen0, so I'm getting from this that it shouldn't be a problem. Good stuff!

re: GC Performance Counters

Maoni — Tue, 08 Jun 2004 07:35:00 GMT

Paul, we are hoping to address that in Whidbey.

Matt, if you meant the problem where occasionally you see a really large value (negative value) for the %Time in GC in V1.1, that is fixed in Whidbey. If that's not what you meant, let me know.

Physical Memory Usage in .Net Applications

Scott Sorensehn — Wed, 09 Jun 2004 02:58:00 GMT

Thanks for the good info on GC Perf Counters. I have several different servers that are running memory intensive applications. These servers are dedicated to the one .Net app running on the server. In some cases it is an ASP.Net application and in other cases it is a .Net application running as a Windows Service. In both cases I have installed 2 gig of RAM on the machines but there seems to be a limit to the amount of RAM that will be used by the CLR because the app is never able to use more than about 600 Meg of RAM before it begins using virutal memory. How can I set the w3wp.exe or CLR in the case of the service to use more of the servers RAM? Also is there a limit to the amount of RAM that can be used by a single ASP.Net application and is it configurable in the case where it is the only ASP.Net app running on the box?

re: Physical Memory Usage in .Net Applications

Maoni — Wed, 09 Jun 2004 22:36:00 GMT

Scott, how did you get the 600 MB number? ASP.net does have a setting for memory - memoryLimit. Search for memoryLimit and asp.net for an explanation of this setting.

Generic Managed code Debugging plus understanding the whys/hows pointers

govind on web — Mon, 05 Jul 2004 10:45:00 GMT

Generic Managed code Debugging plus understanding the whys/hows pointers

govind on web — Mon, 05 Jul 2004 15:15:00 GMT

re: GC Performance Counters

Mark Tucker — Wed, 07 Jul 2004 16:39:00 GMT

Is it possible to never call GC.Collect() in your code and still get values for "# Incuded GC"? Does code in the .NET Framework 1.0 or 1.1 make calls that update this counter? What are all the places that would be called?

re: GC Performance Counters

Maoni — Wed, 07 Jul 2004 20:13:00 GMT

Mark, yes it is possible to get values for "# Induced GC" even when you are not calling GC.Collect yourself. For example, if you call GC.GetTotalMemory with true. In Whidbey we also added more places in the BCL that call GC.Collect. But usually this is very very rare - we recommand to never call GC.Collect in apps in general, and at very limited places in the BCL.

Tools that help diagnose managed memory related issues

Maoni's WebLog — Tue, 09 Nov 2004 10:03:00 GMT

Tools that help diagnose managed memory related issues

Maoni's WebLog — Tue, 09 Nov 2004 10:12:00 GMT

Tools that help diagnose managed memory related issues

Maoni's WebLog — Tue, 09 Nov 2004 10:13:00 GMT

Tracking down managed memory leaks (how to find a GC leak)

Rico Mariani's Performance Tidbits — Fri, 10 Dec 2004 21:02:00 GMT

Tracking down managed memory leaks (how to find a GC leak)

Rico Mariani's Performance Tidbits — Fri, 10 Dec 2004 21:33:00 GMT

Tracking down managed memory leaks (how to find a GC leak)

Rico Mariani's Performance Tidbits — Fri, 10 Dec 2004 21:47:00 GMT

Tracking down managed memory leaks (how to find a GC leak) (from: Rico Mariani)

TOURNEY LOGIC LINK BLOG — Sun, 12 Dec 2004 07:50:00 GMT

New and Notable 68

Sam Gentile's Blog — Tue, 21 Dec 2004 14:34:00 GMT

New and Notable 68

Sam Gentile's Blog — Tue, 21 Dec 2004 22:51:00 GMT

Garbage Collection Articles: an updated list

Steve Hebert's Development Blog — Wed, 27 Jul 2005 00:52:25 GMT

I previously blogged about a set must-read garbage collection articles&nbsp;and issues around directly...

re: GC Performance Counters

Pierre Schexneider — Wed, 25 Oct 2006 18:22:48 GMT

When trying to create a perfmon counter wew get the following error.

nvalidOperationException: Cannot read Instance :MonitorUseResou

namespace Apress.ExpertDotNet.MonitorUseResources

{

//This is the beginning

//below is the code where the problem starts

InitializeComponent();

this.pcGen0Collections = new PerformanceCounter(".NET CLR Memory",

"# Gen 0 Collections", "MonitorUseResou");

this.pcGen0Collections.BeginInit();

this.pcGen1Collections = new PerformanceCounter(".NET CLR Memory",

"# Gen 1 Collections", "MonitorUseResou");

this.pcGen1Collections.BeginInit();

//Here is what we found, when

//we rename "MonitorUseResou" "MonitorUseReso"

//with exactly 14 characters it works. Can you

//explain this?

//Thank You

Tools that help diagnose managed memory related issues

Maoni's WebLog — Thu, 09 Nov 2006 04:08:51 GMT

I was writing an internal wiki page on performance and thought this info is useful to many external readers

Difference Between Perf Data Reported by Different Tools – 2

Maoni's WebLog — Wed, 13 Dec 2006 03:14:53 GMT

Managed Heap Size We have both .NET CLR Memory perf counters and SoS extensions that report manged heap

GC Performance Counters

DotNetKicks.com — Sun, 11 Feb 2007 04:12:50 GMT

You've been kicked (a good thing) - Trackback from DotNetKicks.com

re: GC Performance Counters

Rajesh Patel — Fri, 04 May 2007 00:20:07 GMT

What performance counter should be used to debug the OutOfMemoryException?

re: GC Performance Counters

maoni — Sun, 06 May 2007 11:01:20 GMT

Rajesh, this is answered in http://blogs.msdn.com/maoni/archive/2006/10/22/new-msdn-article-investigating-memory-issues.aspx

re: GC Performance Counters

Ashok Srinivasan — Wed, 23 May 2007 17:08:18 GMT

The multi-threaded server app that we ported from VJ++ to J# is showing a high "# induced GC". We are not calling GC directly from our code. What is the best way to find who is calling the GC?

Thanks!

-Ashok

re: GC Performance Counters

maoni — Thu, 24 May 2007 11:00:27 GMT

Ashok, you can set a breakpoint on the GC.Collect method and see who's calling it.

re: GC Performance Counters

Ashok Srinivasan — Fri, 25 May 2007 22:26:26 GMT

Maoni,

Below is the stack trace I obtained from VS'05 Profiler which captures the bottleneck call sequence -that accounts for over 50% of the sampled time!

Please see my question at the bottom of this post.

WKS::GCHeap::FinalizerThreadCreate(void)

ManagedThreadBase::FinalizerBase(void (*)(void *))

ManagedThreadBase_NoADTransition(void (*)(void *),...)

Thread::SetStackLimits(enum Thread::SetStackLimitScope)

Thread::HasStarted(void)

Thread::DoADCallBack(struct ADID,void (*)...)

CustomAttributeParser::UnpackValue(unsigned char...)

Object::GetAppDomain(void)

WKS::CreateGCHeap(void)

HostExecutionContextManager::SetHostRestrictedContext

WKS::CallFinalizer(class Object *)

MethodTable::CallFinalizer(class Object *)

com.ms.vjsharp.lang.ThreadEnd.Finalize()

FastAllocatePrimitiveArray(class MethodTable *,...)

GCInterface::CollectGeneration(int)

WKS::gc_heap::mark_phase(int,int)

WKS::GCHeap::GarbageCollectGeneration(unsigned int...)

WKS::gc_heap::garbage_collect(int,int)

Please note that the last line above represents top of the stack. It appears that ThreadEnd.Finalize is inducing the garbage collection? I am stuck here. What do you think could be going on?

Thanks!

re: GC Performance Counters

maoni — Sat, 26 May 2007 03:40:30 GMT

Ashok, the calls you showed - they can't be from the same callstack.

re: GC Performance Counters

Ashok Srinivasan — Sat, 26 May 2007 16:06:13 GMT

Maoni, this is as reported by VS'05 Team Profiler while sampling our server exe over a half hour period. I pulled this out of the call stack view. The execution thread in question is calling Finalize on various objects all of happen very fast EXCEPT for ThreadEnd.Finalize. The profiler clearly shows:

1. FastAllocatePrimitiveArray to be a descendent of ThreadEnd.Finalize

2. GCInterface.CollectGeneration to be the descendent of FastAllocatePrimitiveArray().

I have run the profiler several times now. The results are consistent - always the same.

What am I missing?

Is there a way I can send you the .VPS (Profiler report) file?

Thanks!

re: GC Performance Counters

maoni — Sat, 26 May 2007 20:46:43 GMT

Ashok, I dunno how to intrepret what VS profiler shows 'cause I don't use it. But I can tell you for a fact that FastAllocatePrimitiveArray doesn't call GCInterface.CollectGeneration.

The advice I can give you is to set a bp on the GC.Collect call (you can set it on GCInterface.CollectGeneration if you want...the former calls the latter).

ASP.NET Case Study: High CPU in GC - Large objects and high allocation rates

If broken it is, fix it you should — Mon, 20 Aug 2007 15:44:07 GMT

Rather than spending a lot of time on explaining the details of the garbage collector, I'll refer you

Tracking down managed memory leaks : icodeinc.com

Tracking down managed memory leaks : icodeinc.com — Thu, 23 Aug 2007 02:42:59 GMT

PingBack from http://icodeinc.com/blog/?p=3

re: GC Performance Counters

Alex Feinberg — Thu, 27 Sep 2007 05:40:59 GMT

ThreadEnd.Finalize definitely calls GC.Collect()

Boxing » Blog Archive » Maoni’s WebLog : Using GC Efficiently Part 1

Boxing » Blog Archive » Maoni’s WebLog : Using GC Efficiently Part 1 — Sat, 05 Jan 2008 06:35:03 GMT

PingBack from http://boxing.247blogging.info/?p=258

J# threads calling GC.Collect

ASP.NET Debugging — Mon, 21 Jan 2008 22:53:33 GMT

Problem We have had a few customers run into this issue where they are using the J# ThreadEnd objects

J# threads calling GC.Collect

Noticias externas — Mon, 21 Jan 2008 23:15:50 GMT

Problem We have had a few customers run into this issue where they are using the J# ThreadEnd objects

GC Collection « Crossroads

GC Collection « Crossroads — Sat, 01 Mar 2008 03:53:44 GMT

PingBack from http://paanis.wordpress.com/2008/03/01/gc-collection/

re: GC Performance Counters

Aish — Sun, 16 Mar 2008 02:01:06 GMT

Hi,

I have been having trouble understanding very large values in % Time in GC? Aren't the values supposed to be in the reange 0-100%? What would a value like 2018.185129 mean? Any help would be greatly appreciated!

Thank you!

Regards,

Aishwariya

Best ASP.NET Performance Winner For Data Binding - Hands Up To Response.Write()

Alik Levin's — Thu, 31 Jul 2008 15:29:59 GMT

     To achieve best performance you need to make decisions based on trade-off between

1. The garbage collector in X++ and the CLR

Florian's weblog — Mon, 08 Dec 2008 02:02:48 GMT

I often hear from X++ developers, that the .Net garbage collector ( GC ) does not work correctly or that

1. The garbage collector in X++ and the CLR

Florian's weblog — Tue, 16 Dec 2008 01:42:05 GMT

I often hear from X++ developers, that the .Net garbage collector ( GC ) does not work correctly or that

Скаженi кабани: GridView vs Response.Write

Podlipensky — Mon, 29 Dec 2008 10:19:58 GMT

Разработка веб-сайтов, впрочем как и любых других софтверных строений, всегда стояла на распутьи трех

Best Practices for CRM Memory Usage

Microsoft Dynamics CRM Team Blog — Thu, 12 Mar 2009 19:20:24 GMT

Are you trying to improve the memory usage of your .net application? I’ve spent some time recently trying