[Numpy-discussion] Largest possible numpy array

Sturla Molden sturla at molden.no
Sat Feb 26 13:44:03 EST 2011

Den 26.02.2011 16:09, skrev Jaidev Deshpande:
> Hi
> How can I know the size of the largest possible 2-D array in numpy, 
> given a specific 'dtype' and my system memory?

The largest array size is not dicatated by system memory but virtual memory.

On Windws the available virtual address space is 2 GB with x86 and 16 TB 
with AMD64.

If you have less physical memory than the array size, the OS will swap 
some of it to disk.


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