Please show the code you are using to open and read your file.

open() shouldn't use up your memory, but reading the file might. Perhaps you are trying to read it all into memory at once? That will cause problems with large files; better to just handle one line at a time in memory.

Try something like: 

my $filepath = '/path/to/huge/file';
open my $fh, '<:encoding(UTF-8)', $filepath or die $!;
while ( my $line = <$fh> ) {
    # process one line at a time
}
close $fh or die $!;

[download]
HTH!

The way forward always starts with a minimal test.

In reply to Re: Alternate for "open" by 1nickt
in thread Alternate for "open" by ravi45722

Title:
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, details, 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, summary, 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.