.Net 为什么我不能在 x64 进程中获得超过 11GB 的分配内存? [英] .Net Why can't I get more than 11GB of allocated memory in a x64 process?

问题描述

我认为 64 位进程的最大用户空间是 8TB，但我做了一个小测试，我能得到的最大值是 10-11GB.

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.

注意:我在一个过程中不需要那么多内存，我只是出于好奇想了解为什么.

Note: I don't need that much memory in a process, I just want to understand why out of curiosity.

这是我的测试程序:

static void Main(string[] args)
{
    List<byte[]> list = new List<byte[]>();

    while (true)
    {
        Console.WriteLine("Press any key to allocate 1 more GB");
        Console.ReadKey(true);
        list.Add(new byte[1024 * 1024 * 1024]);

        Console.WriteLine("Memory size:");
        double memoryUsage = Process.GetCurrentProcess().PeakVirtualMemorySize64 / (double)(1024 * 1024 * 1024);
        Console.WriteLine(memoryUsage.ToString("0.00") + " GB");
        Console.WriteLine();
    }
}

更新了测试程序，使其更具确定性.

Updated the test program to be more deterministic.

为了接受答案，我想知道如果 8TB 只是理论上的，那么实际最大分配内存是如何计算的.

To accept an answer I would like to know how the real maximum allocated memory is calculated if 8TB is only theoretical.

推荐答案

高达 8 TB，而不是 8 TB.您最多可以拥有 8 TB，但您需要匹配的 RAM/交换文件.

It's up to 8 TB, not 8 TB. You can potentially have up to 8 TB, but you need the matching RAM/swapfile.

这篇关于.Net 为什么我不能在 x64 进程中获得超过 11GB 的分配内存?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！