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Questions tagged [gcallowverylargeobjects]

gcAllowVeryLargeObjects

Example:

<configuration>
  <runtime>
    <gcAllowVeryLargeObjects enabled="true" />
  </runtime>
</configuration>
19 questions
32
votes
4 answers

Very large collection in .Net causes out-of-memory exception

I am testing how big a collection could be in .Net. Technically, any collection object could grows to the size of the physical memory. Then I tested the following code in a sever, which has 16GB memory, running Windows 2003 server and Visual Studio…
Yin Zhu
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14
votes
1 answer

OutOfMemoryException with gcAllowVeryLargeObjects

I'm using a BinarySerializer with a pretty big (althought not very deep) graph of items. I have 8GB of ram backed by 12Gig of swap and i'm getting an OutOfMemoryException when serializing which is expected ( it's possible the graph could go near or…
Ronan Thibaudau
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9
votes
2 answers

2d-Array with more than 65535^2 elements --> Array dimensions exceeded supported range

I've a 64-bit PC with 128 GB of RAM and I'm using C# and .NET 4.5. I've the following code: double[,] m1 = new double[65535, 65535]; long l1 = m1.LongLength; double[,] m2 = new double[65536, 65536]; // Array dimensions exceeded supported range long…
Wollmich
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7
votes
1 answer

how do you write gcAllowVeryLargeObjects using codebehind

how do I write this in c# in the code behind? gcAllowVeryLargeObjects I can't use a config file. below is the config files version
Andre DeMattia
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4
votes
1 answer

Why are C# arrays still limited to ~2.1 billion elements

In .Net 4.5 gcAllowVeryLargeObjects was introduced to allow arrays greater than 2gb in size for 64 bit systems. However arrays were (and still are) limited to ~4.2 billion elements and ~2.1 billion in any dimension. Why? Is there no interest for it…
Michael
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  • 18
4
votes
1 answer

Possible drawbacks of gcAllowVeryLargeObjects?

After several outOfMemory exceptions, I enabled "gcAllowVeryLargeObjects", it works perfectly fine. I am now wondering why it is not a default option in C# (on a 64-bit platform). Is it for pure compatibility reasons ? Or am I missing a major…
RUser4512
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3
votes
1 answer

Array.Copy --> Arrays larger than 2GB are not supported

I'm using the Array.Copy Method (Array, Array, Int64). I've the following static method public static T[,] Copy(T[,] a) where T : new() { long n1 = a.GetLongLength(0); long n2 = a.GetLongLength(1); T[,] b = new T[n1, n2]; …
Wollmich
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  • 46
2
votes
2 answers

OutOfMemoryException using Bitmap to resize large image

I want to resize the image in my website, but when I using Bitmap to load a image of 14032*19864(png extension), an OutOfMemoryException is thrown. My compiler configuration is any cpu. I was doubting whether the running environment is x64. the code…
majing
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2
votes
1 answer

How to set gcAllowVeryLargeObjects to true for AzureWorker role?

I\m unable to understand how to set gcAllowVeryLargeObjectsruntime param for worker role. I set this pram in app.config. But it doesnt work. As I understand I need to somehow config it in config file of wotker host. Update: Final solution based on…
Hodza
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2
votes
2 answers

Array Allocation in .NET

The question is regarding the allocation of arrays in .net. i have a sample program below in which maximum array i can get is to length. I increase length to +1 it gives outofMemory exception. But If I keep the length and remove the comments I am…
user1977781
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1
vote
2 answers

how do you create a large array?

Given // r is a System.Data.IDataRecord var blob = new byte[(r.GetBytes(0, 0, null, 0, int.MaxValue))]; r.GetBytes(0, 0, blob, 0, blob.Length); and r.GetBytes(...) returns Int64 Since Array.zeroCreate and Array.init take Int32 how do I create an…
Maslow
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1
vote
3 answers

Extra large array

I have to operate with two-dimensional array(s) with size 34000x34000 items for math calculations. Obvious problem - is impossibility of CLR to store such big parts of data in memory. I tried to use MemoryMappedFile, but it fails too while I'm…
dotFive
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1
vote
3 answers

Difference between Array.zeroCreate and Array.init

I wanted to show to a colleague that you can allocate more than 2GB of ram, so I made a little test application. let mega = 1 <<< 20 let konst x y = x let allocate1MB _ = Array.init mega (konst 0uy) let memoryHog = Array.Parallel.init 8192…
Daniel Fabian
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0
votes
0 answers

C# .Net 6.0 OutOfMemory Dictionary

after a lot of searching I have unfortunately not found a solution for this problem under .Net 6.0. My application is running on a x64 Linux server and the dictionary contains just 3,192,915 elements and I get the OutOfMemoryException. I have tried…
Denys
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0
votes
1 answer

How can I set C#'s gcAllowVeryLargeObjects to true in VS2022 **without** using an App.config file?

I want to be able to programmatically (or at least using the Project properties) set gcAllowVeryLargeObjects to true. I know I can use the App.config file, but this is quite ugly as it needs to create a separate file to the main executable which…
Dan W
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