i'm pretty certain i have a memory leak - its footprint grows steadily until it dies

i have tried putting

find_cycle($obj);
[download]

on all suspect objects in my code, but it is not reporting anything. does this mean these objects definitely do not have circular references?

i pass by ref everywhere, once a sub goes out of scope it's reference should go away, is that correct?

EDIT:
Edited this to say I have searched perlmonks and now i think maybe my memory is just growing and not leaking. Here's an example:

--------------------------------

package Obj;

sub new 
{
    my $class = shift; 
    my $name = shift;
    my $value = shift;
    
    my $self = {
        NAME => $obj, 
        VALUE => $value 
    };

    bless $self, $class;
    
    return $self;
}

return 1;




--------------------------------
# main.pl
--------------------------------

my @objects = ();
my $i = 0;

while($i < 20000000) {
    @objects = getObjects(); 

        # do something

    $i += 100;
}

sub getObjects
{
    my @objects = ();
    my $object = undef;
    my %ht = ();  # say i use a hash somewhere in here
    my $i = 0;

    
    for($i=0; $i<100; $i++) {
        $object = new Obj("name_$i", $i);
        $objects[$i] = $object 
    }
    
    return @objects;
}
[download]

Will the array of 100 objects and hash in the sub GetObjs be reclaimed/re-used or will another chunk of memory for 100 objects be taken every call to this sub?


EDIT 2


i think i found the issue? let's say getObjects opened and closed a db connection every call to get its data, using Win32::ODBC. This appears to be causing the memory to grow. here is an example:

use Win32::ODBC; 

my @objects = (); 
my $i = 0; 

while($i < 20000000) { 
    @objects = getObjects(); 
    # do something 
    $i += 100; 
} 

sub getObjects { 
    my @objects = (); 
    my $object = undef; 
    my $db = undef; 
    my $i = 0; 
    
    $db = new Win32::ODBC("DSN=dsnname;UID=username;PWD=pw%") || die; 
    
    for($i=0; $i<100; $i++) { 
        #$object = new Obj("name_$i", $i); 
        $objects[$i] = $object 
    } 
    
    if($db) { 
        $db->Close(); 
    }
    
    return @objects; 

}
[download]

I tried adding $db = undef; with no luck. does $db not get re-used every call??

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