我正在尝试使用multiprocessing.RawArray在共享内存中分配一组图像缓冲区。它适用于少量图像。但是，当我到达一定数量的缓冲区时，我得到一个OSError指示我的内存不足。

一个明显的问题，我实际上是内存不足吗？根据我的计算，我要分配的缓冲区应该大约有1 GB的内存，并且根据Windows Task Manager，我有大约20 GB的可用空间。我看不到我实际上怎么可能会内存不足！

我是否达到了某种我可以增加的人造内存消耗限制？如果没有，为什么会这样，我该如何解决？

我正在使用Windows 10，Python 3.7、64位体系结构，总共32 GB RAM。

这是一个最小的可重现示例：

import multiprocessing as mp
import ctypes

imageDataType = ctypes.c_uint8
imageDataSize = 1024*1280*3   # 3,932,160 bytes
maxBufferSize = 300
buffers = []
for k in range(maxBufferSize):
    print("Creating buffer #",k)
    buffers.append(mp.RawArray(imageDataType,imageDataSize))

输出：

Creating buffer # 0
Creating buffer # 1
Creating buffer # 2
Creating buffer # 3
Creating buffer # 4
Creating buffer # 5

...等等...

Creating buffer # 278
Creating buffer # 279
Creating buffer # 280
Traceback (most recent call last):
  File ".\Cruft\memoryErrorTest.py",line 10,in <module>
    buffers.append(mp.RawArray(imageDataType,imageDataSize))
  File "C:\Users\Brian Kardon\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\context.py",line 129,in RawArray
    return RawArray(typecode_or_type,size_or_initializer)
  File "C:\Users\Brian Kardon\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\sharedctypes.py",line 61,in RawArray
    obj = _new_value(type_)
  File "C:\Users\Brian Kardon\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\sharedctypes.py",line 41,in _new_value
    wrapper = heap.BufferWrapper(size)
  File "C:\Users\Brian Kardon\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\heap.py",line 263,in __init__
    block = BufferWrapper._heap.malloc(size)
  File "C:\Users\Brian Kardon\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\heap.py",line 242,in malloc
    (arena,start,stop) = self._malloc(size)
  File "C:\Users\Brian Kardon\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\heap.py",line 134,in _malloc
    arena = Arena(length)
  File "C:\Users\Brian Kardon\AppData\Local\Programs\Python\Python37-32\lib\multiprocessing\heap.py",line 38,in __init__
    buf = mmap.mmap(-1,size,tagname=name)
OSError: [WinError 8] Not enough memory resources are available to process this command