Each double
is 8 bytes, so you're trying to allocate a single array with just over 5GB. The CLR has a per-object limit of around 2GB IIRC, even for a 64-bit CLR. In other words, it's not the total amount of memory available that's the problem (although obviously you'll have issues if you don't have enough memory), but the per-object size.
I suggest you split it into smaller arrays, perhaps behind a facade of some description. I don't believe there's any way to workaround that limit for a single array.
EDIT: You could go for an array of arrays - aka a jagged array:
double[][] array = new double[12000][];
for (int i = 0; i < array.Length; i++)
{
array[i] = new double[55000];
}
Would that be acceptable to you?
(You can't use a rectangular array (double[,]
) as that would have the same per-object size problem.)
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