#use strict;
#use warnings;

#-- Format memory in MB from db2pd -dbptnmem
#-- Run as db2pd -dbptnmem | perl -nl db2mem.pl
#-- or  perl -nl db2mem.pl db2mem.PB1

sub commify {
    my $text = reverse $_[0];
    $text =~ s/(\d\d\d)(?=\d)(?!\d*\.)/$1,/g;
    return scalar reverse $text;
}

print if ($. == 1);
if (/Name|===/) {
  s/KB/MB/g;
  print;
}

if (/Memory Limit|Current usage:|HWM usage:| Cached memory:/ && length($_) > 0 ){
  ($name, $value) =split /:/;
  $value =~ s/KB//g;
  printf  "%-14s:  %10s MB\n", $name, commify(int $value/1024);
  if ($name eq "HWM usage") {
      printf "\n";
    }
}

if (/APPL-|DB-|FMP|PRI/) {
($name, $used, $hwm, $free) =split /\s+/;
printf  "%-15s  %10s  %10s  %10s\n", $name, commify(int $used/1024), commify( int $hwm/1024), commify( int $free/1024);
}