2d数组“ std :: bad_alloc（）” what（）的运行时错误

Question

I have dynamically allocated a 2D array of size 1100*10^9 and I am getting the following runtime error -

This is the runtime error

I don't encounter this error if I decrease the size of the array to 1100*10^5 . Please Help . Thanks in advance . Edit - I have added the part where I allocate the array.

 unsigned int** cache = new unsigned int*[1100] ;
for (int i = 0 ; i < 1100 ; i++)
    cache[i] = new unsigned int [1000000000] ;

Answer 1

1100 * 10^9 is 1.1*10^12 elements. Let's for a moment assume that these elements are 4-byte integers, that's a total allocation of:

4.4 * 10^12 bytes

dividing by 1024 * 1024 * 1024 to get gigabytes...

1,048,017.748 GB - which is about a thousand terabytes.

I don't think there is a processor architecture anywhere on the planet which can address, let alone allocate, this much ram.

(although if I'm wrong about this I'd be fascinated to hear it!)