Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
A cheap way to release a large chunk of memory back to the OS, once a Perl script is done with it, is to fork and exec the memory intensive code, then somehow store the results to be used later. That way, your original Perl script does not retain the memory, at the expense of extra design considerstions to save the returns from the forked code in a db or file.

If you want to keep everything in a single script, the only way it will work is if your data is a big string.

#!/usr/bin/perl -w use strict; $| = 1; { my $string; for ( 1 .. 100000 ) { $string .= ( 'x' x 1000 ); } print "press enter to release"; <>; undef $string; print "undefined but still in scope of sub, hit enter\n"; <>; # if the variable only goes out of scope. # you *need* to undef it! } print "ok,out of scope, press enter to exit"; <>;
This will not work with arrays nor hashes, but if you can somehow stringify your data, the above may work for you.

I'm not really a human, but I play one on earth. Cogito ergo sum a bum

In reply to Re: How to return unused memory to OS? by zentara
in thread How to return unused memory to OS? by mihirjha

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others romping around the Monastery: (9)
    As of 2018-07-16 15:08 GMT
    Find Nodes?
      Voting Booth?
      It has been suggested to rename Perl 6 in order to boost its marketing potential. Which name would you prefer?

      Results (342 votes). Check out past polls.