How to let the Cygwin to use all memory in my computer?

[Fengchao]

Hi,

I noticed that Cygwin can't use all memory in my computer that has 32G 
available. It can only use little memory and throw a memory leak error. 
I wonder if there is a way to let the Cygwin access all my computer's 
memory?

By the way, my OS: windows 7 64 bit.

Thanks

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