Thanks so much for your answer.

My intention actually is to measure the total memory size of all data structure used in my script.
I'm sorry if I wasn't being clear in my OP.

Then I try this simple script, comparing it with Devel::Size. 
#!/usr/bin/perl -w
use strict;
use Proc::ProcessTable;
use Devel::Size qw(size);


my @arr = ('A' .. 'M');
my $devel_size = size(\@arr);
print "With DEVEL::SIZE I'm $devel_size bytes big\n";


my $t = Proc::ProcessTable->new();

foreach my $p ( @{$t->table} ) {
    if($p->pid() == $$) {
    print "With Proc::ProcessTable I'm ", $p->size(), " bytes big.\n";
        last;
    }
}

[download]
It gives: 
With DEVEL::SIZE I'm 104 bytes big
With Proc::ProcessTable I'm 5357568 bytes big.

[download]
The difference here is so big. I wonder why? Does Proc::ProcessTable gives the size which I intend to get? If no, is there a way to achieve my original intention?

Regards,
Edward

In reply to Re^2: Total Memory Size Used up by a Perl Script by monkfan
in thread Total Memory Size Used up by a Perl Script by monkfan

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