[Python] Python 32-bit on Windows 64-bit

[Python] Python 32-bit on Windows 64-bit

	Craig Yoshida
	Feb 11, 2011 at 6:41 pm

what kind of memory limitations to processes running on 32-bit python (with 32-bit C extensions like scipy) have on 64-bit Windows? I'm having occasional MemoryErrors when running a python program on 64-bit Windows 7 that runs fine on my OS X machine. Both machines are using a 64-bit OS and have 4GB of RAM.

Thanks,
-Craig

Search Discussions

Discussion Posts

Follow ups

Michel Claveau - MVP: Hi! Python 32 bits (& Pywin32) limits are: 2 GB on win.7_32 bits 4 GB on win.7_64 bits That's what I found in my tests. @-salutations -- Michel Claveau
Martin v. Loewis: In addition to the limitations Michel reports: on a 32-bit system, objects are typically limited to using at most 2GiB, per object (of course, you could have at most two objects that come close to this size, since the whole address space would not be larger than 4GiB). Regards, Martin
Sherm Pendley: IIRC, 32-bit Windows programs are limited to 2GiB, reserving the rest of the virtual address space for Windows' own use. Also, 32-bit apps remain 32-bit, even if they're running on a 64-bit capable OS. Assuming you're running Snow Leopard on your Mac, you're using a 64-bit Python interpreter *and* a 64-bit OS. You need to have both to take advantage of a 64-bit memory space. sherm-- -- Sherm Pendley Cocoa Developer

Related Discussions

Discussion Navigation

view	thread \| post
posts	‹ prev \| 1 of 5 \| next ›

Discussion Overview

group	python-list @
categories	python
posted	Feb 11, '11 at 6:41p
active	Feb 12, '11 at 12:27a
posts	5
users	5
website	python.org

font	variable	Hotkey: f
user style	avatars	Hotkey: a

[Python] Python 32-bit on Windows 64-bit

Search Discussions

Discussion Posts

Related Discussions

5 users in discussion