I'm asking this becuase undefing the hash or reseting ( undef %hash or hash = () ) doesn't release the memory.

Prove it! (Ie. demonstrate your claim by posting working code; because what you claim is not normally true.)

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

RIP Neil Armstrong

In reply to Re: Memory issue with Hash by BrowserUk
in thread Memory issue with Hash by nowise

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