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Re^2: Memory is not released back to operating system

by Argel (Prior)
on Mar 02, 2012 at 21:48 UTC ( #957559=note: print w/ replies, xml ) Need Help??


in reply to Re: Memory is not released back to operating system
in thread Memory is not released back to operating system

I thought perl specifically tries to hold onto memory so it can reuse it again instead of having to allocate new memory?

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Re^3: Memory is not released back to operating system
by eyepopslikeamosquito (Canon) on Mar 02, 2012 at 23:13 UTC

    No, it defers to the implementation of the C runtime library malloc.

    Though I wouldn't recommend it unless you are desperate, it is possible to change the "release memory to the OS" behaviour by building Perl using a custom malloc.

    This has been discussed here many times before, see for example: Not able to release memory and How to return unused memory to OS?.

    From my testing across a number of OSes, I would expect only Linux and Windows to return "large" blocks of memory back to the OS. I would be interested to learn what operating system the OP is running on.

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