发现我是多么的内存可以分配在C＃中的数组 [英] Finding how much memory I can allocate for an array in C#

问题描述

我做一些计算，需要一个大的阵列进行初始化。该阵列的最大大小决定了我能解决这个问题的最大尺寸。

I am doing some calculations that require a large array to be initialized. The maximum size of the array determines the maximum size of the problem I can solve.

有没有一种方法以编程方式确定有多少内存可用于比方说，字节可能吗？

Is there a way to programmatically determine how much memory is available for say, the biggest array of bytes possible?

感谢

推荐答案

那么，依靠一个单一的巨大的阵列上有一系列的相关问题 - 内存碎片，连续的块中，的最大对象大小等限制。如果你需要大量的数据，我会建议创建模拟使用大量的小（但仍然大）阵列的大阵的一类，每一个固定大小的 - 即索引分向找到相应的数组，然后使用％的数组中得到补偿。

Well, relying on a single huge array has a range of associated issues - memory fragmentation, contiguous blocks, the limit on the maximum object size, etc. If you need a lot of data, I would recommend creating a class that simulates a large array using lots of smaller (but still large) arrays, each of fixed size - i.e. the indexer divides to to find the appropriate array, then uses % to get the offset inside that array.

您可能还需要确保你是在一个64位操作系统，拥有大量内存。这会给你最大的可用头部空间。

You might also want to ensure you are on a 64-bit OS, with lots of memory. This will give you the maximum available head-room.

根据不同的情况下，更复杂的算法，如稀疏数组，ETA-载体等可能会利用最大化你可以做什么。你可能会很惊讶人们可以做什么多年前内存有限，只是磁带旋转前后...

Depending on the scenario, more sophisticated algorithms such as sparse arrays, eta-vectors, etc might be of use to maximise what you can do. You might be amazed what people could do years ago with limited memory, and just a tape spinning backwards and forwards...

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