.Net Why can't I get more than 11GB of allocated memory in a x64 process?

Question

I thought that the maximum user space for a 64bit process was 8TB, but I did a little test and the maximum I could get is 10-11GB.

Note: I don\'t need that much memo

Answer 1

I'm guessing its because you're using a List, which I believe has an internal limit.

See what you can get if you try something like creating your own old school list:

public class ListItem
{
    public ListItem Parent;
    public T Value;

    public ListItem(ListItem parent, T item)
    {
        this.Parent = parent;
        this.Value = item;
    }
}

I have written almost that exact code before (only my item was an int) and run it on a machine with 32 processors and 128 GB of ram, it always crapped out at the same size no matter what, and was always something related to Int32.MaxValue, hope that helps.