Hi All, I have never given much thought to memory deallocation with Perl because I have read in just about every book I own that Perl handles garbage collection automatically . I've written quite a bit of code with Perl over the past many years but did not really have to be too concerned about MEM usage . I am now working with larger arrays ( LoL's ) and wish to ensure deallocation of MEM but am a bit puzzled now because when I undef the @X array in code below , the system memory is not released . It is only released when the program exits. I'm using windows , with the Activestate perl binary install. 
{
my $i=0 , @X ;
while ( $i < 500000 ) {
push @X , ["a.".$i , "b.".$i , "c.".$i , "d.".$i ] ;
if ($i%10000==0) {printf "Index $i $X[$i][2] \n\n" ;}
$i++ ;
} ;
printf "Max X index Before undef %d\n",$#X ;
sleep 5 ;
undef @X ;
sleep 5 ;
printf "Max X index After undef %d\n",$#X ;
};
sleep 15 ;

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Thank you for your insights . Nova

In reply to memory deallocation by Nova

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