Allocating more than 1,000 MB of memory in 32-bit .NET process

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Having enormous blocks of memory is never a good idea, even in 64bit. You get big problems with contiguous memory and fragmentation.

The problem here is finding a contiguous block. You could try enabling 3gb mode (which might help it find a few more bytes) but I really advise against it. The answers here are:

  • use less memory
  • use a database/file system
  • use x64

You might also want to read Eric Lippert’s blog (he seems to have a blog entry for every common .NET question…)

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