Microsoft Visual Studio 2010 Out Of Memory Error
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27, 201018 Share 0 0 When you run your VB or C# application, you might get an OutOfMemoryException thrown, even if your machine has lots of memory. Every 32 bit process has a out of memory c# 2^32 bit (4 Gig) address space. That means every pointer has a size of
Run Time Error 7 Out Of Memory
32 bits (4 bytes) and thus is limited to 4 Billion. That’s the equivalent of saying a vehicle license plate number out of memory windows 7 consists of 6 digits and thus there are 1 million possible numbers. That 4 Gigs is divided into half: the user application gets the lower half and the OS gets the upper. (This boundary
Out Of Memory Windows 10
can be changed: see below). Start VS 2010. File->New->Project->VB or C# Windows WPF Application. Paste the VB or C# code below. It creates a heap then allocates 100Meg of memory in a loop continuously until an exception is thrown. On my 64 bit Windows 7 machine with 8 Gigs of RAM (your digital camera or phone might have more memory!), I get about 1.4Gig allocated before it dies. runtime error 7 out of memory vb6 Iter #10 1,048,576,000 Iter #11 1,153,433,600 Iter #12 1,258,291,200 Iter #13 1,363,148,800 Exception Exception of type ‘System.OutOfMemoryException' was thrown. Now choose Project->Properties->Compile->Build Events->PostBuildEvent Command and added these 2 lines call "$(DevEnvDir)..\..\vc\vcvarsall.bat" x86 "$(DevEnvDir)..\..\vc\bin\EditBin.exe" "$(TargetPath)" /LARGEADDRESSAWARE Note: the positions of the quotes are critical The first line calls a BAT file that makes various tools available on the path. The second runs EditBin on the target binary, using the LARGEADDRESSAWARE flag (that’s almost all left hand keys on the keyboard!) Also uncheck the option: Project->Properties->Debug->Enable the Visual Studio Hosting Process The only effect of these 2 lines is to call EditBin to toggle a bit in the EXE. When the EXE starts a process, that entire process is flagged as able to work with pointers above 2G. With such pointers, the high bit is a 1, which, in 2’s complement notation, is a negative number, and some applications may not be designed to work with “negative” pointers. Now when I run the code I get 3.5 Gigs: More than twice as much memory! Iter #30 3,145,728,000 Iter #31 3,250,585,600 Iter #32 3,355,443,200 Iter #33 3,460,300,800 Exception Exception of type ‘System.OutOfMemoryException' was thrown. This Editbin “trick” works fine on a 64bit OS.
★★★★★★★★★★★★★★★ Mahipal Kante - MSFTJune 10, 20104 Share 0 0 If you see large number of “Out of Memory” Exceptions in your Load Test results, do not quickly conclude
Runtime Error 7 Out Of Memory Windows 10
that there is a memory leak! First make sure you are running Agents on
Out Of Memory Error Windows 10
64 Bit OS in a 64 Bit Test Run. Note the two terms with 64 bit in them, which I have make visual studio use more memory explained below. If you want to scale up the VUsers to 1000 and beyond, one fundamental requirement is that your Agent machines should be of 64 Bit OS. For each Agent machine there is only https://blogs.msdn.microsoft.com/calvin_hsia/2010/09/27/out-of-memory-easy-ways-to-increase-the-memory-available-to-your-program/ one process that is running the load test, which needs to spawn thousands of threads. Due to this the memory consumed by Agent process increases linearly as the number of VUsers increase. For a large VUser load, the memory consumed can easily go much beyond 2 GB, which is the limit for any process on a 32 bit OS. This is why for a large VUser volume, Load Test will start https://blogs.msdn.microsoft.com/mahipalkante/2010/06/10/visual-studio-2010-load-test-out-of-memory-exceptions-on-32-bit-machines-or-32-bit-run/ throwing “Out of Memory” exceptions. These exceptions are not thrown by OS itself, but the Load Test engine starts throwing these exceptions as soon as the process reaches 1.75 GB. So, even if your machine has huge memory and CPU, load test will not be able utilize it well. Hence, it is imperative that you change the machine OS to 64 bit. An important thing to remember once upgrading your OS to 64 bit is to make sure to change the Test Run Settings also to 64 Bit. Otherwise, your Load Test will continue to run in 32 bit mode on 64 Bit OS, and you will not be able to go past the out of memory exceptions. So, if you are browsing the Load Test results, and you see Out of Memory exceptions, be sure to look for “QTAgent32” in the results as shown in the above picture. If you see this, you should go and change the run settings as shown below to 64 Bit. On a 64 bit run, the Agent process is listed as “QTAgent” with no “32” suffix! Finally here is a graph of a successful 64 bit run for a 1000 Vusers, which clearly shows that the Virtual Bytes of the QTAgent process h
where you had only 640 KB of memory, and you had concepts like "expanded memory" and "extended memory" and memory bank switching to use http://blogs.msmvps.com/carlosq/2009/06/09/the-strange-case-of-visual-studio-getting-quot-out-of-memory-quot/ more than 640 KB and then wonderful things like the Watcom C++ compiler that allowed you to create linear 32-bit MS-DOS programs to use all the available memory, not just 640 KB or 1 GB MB (oops!). When Windows (95) became a 32-bit OS and I learned at college about 32 bit pointers, it seemed that 4 GB of out of memory will be enough forever. Guess what? Some weeks ago I got "out of memory" errors from Visual Studio when trying some features of my MZ-Tools add-in that operate on every file of a solution. Specifically, the problem happened when iterating the code elements of the EnvDTE.ProjectItem.FileCodeModel of every file of the solution. My computer had 4 GB of RAM out of memory so I was surprised by this error (later I learned that the amount of RAM is irrelevant for most "out of memory" errors in modern virtual memory operating systems). The first reference that I found on the web about this error was in the MSDN VSX forum: ProjectItem.FileCodeModel causes memory fragmentation? http://social.microsoft.com/Forums/en-US/vsx/thread/9d6c1d17-63c8-40c4-b6bc-e7f0ead65c3d Notice that while MSFT people explained that this is due to COM objects in memory wrapped by .NET objects that are not released, the explanation does not solve the problem, neither the manipulation of the Garbage Collector (GC). I didn't try using EnvDTE.Project.CodeModel because it didn't meet my needs of "file by file" processing. Then I found that mine was not the only extension for Visual Studio experiencing this problem. Resharper was also experiencing it and provided some tools to fix it. But it was non until I read this post when I learned about the cause and (kind of) solution for this problem: Hacking Visual Studio to Use More Than 2Gigabytes of Memory http://old.stevenharman.net/blog/archive/2008/04/29/hacking-visual-studio-to-use-more-than-2gigabytes-of-memory.aspx So, the problem is not the lack of physical memory