Hello all, I have a huge file (4.2GB) which contains entries similar to this:

Length_meas_C1C2 0.22
0.00 00.000 .090
Length_meas_C1C2 0.18
0.00 00.000 .090
0.00 00.000 .090
Length_meas_C1C2 0.18
Length_meas_C1C2 0.18
0.00 00.000 .090
Length_meas_C1C2 0.18

I am trying to parse this file and count the number of
times a certain layer number is found. Here is the
code I have...this works fine for smaller files, however
I am getting the out of memory error for the actual
data files. Can anyone offer any suggestions on how to
avoid this issue? Thanks in advance! 


#!/opt/perl/5.8.7-32bit/bin/perl

my $inFile = $ARGV[0];
my %CALHASH;
my @CALARR;
if(!$ARGV[0]) {exit;}

open(FH, "<$inFile");
foreach $line (<FH>) {
  chomp($line); #remove newline from end of line
  if($line =~ /(\w+_meas_.*)/) {
  ##($layer, $enc) = split(' ', $1); 
  $layer =  $1; 
  #print "$layer, $enc\n"; 
  if (exists $CALHASH{$layer}) {
      $CALHASH{$layer}{'freq'}++;
  } else {
      $CALHASH{$layer}{'freq'} = 1;
      
  } 
  }
}

foreach $key (keys %CALHASH) {
  print "$CALHASH{$key}{'freq'} $key\n";
}

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In reply to Out of memory!!?? by dramguy

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