MemoryError Numarray

[Bernhard Reimar Hoefle]

I have the following python script:
#######################################
from numarray import *

while 1:
	a=arange(1,300000000)
	b=a*100/100
	del a
	del b
#######################################

This script crashes after a few minutes with an error:

MemoryError: Couldn't allocate requested memory

How can I avoid python to use new memory space for each loop?