How we can create very large xml file(1 GB) using XML::Simple module.
variable $tableDetailsRef is ref of hash, will hold very large blob. While using with xmlout causing memory issue. Host is RHEL6 and memory available is 36 GB. I am using below code: 
#this variable will hold very large complex data structure. 
my $tableDetailsRef = {};

my $xmlFile = "test_name.xml";
my $targetNameStr = "target-name";
#Creating object for xml file
my $xmls = XML::Simple->new( RootName   => undef,
                           ForceArray => ['tables'],
                           KeyAttr    => { table => 'id' },

);
my $contents = {};
$contents->{dspl}->{targetNamespace} = "string_test";

################################################
if(defined $tableDetailsRef){
    push @{ $contents->{dspl}->{'tables'} },
      {
         table => $tableDetailsRef,
      };
}
    
####################################################
##Generate the xml file
eval {
       $xmls->XMLout( $contents,
                      xmldecl    => '<?xml version="1.0" encoding="UTF
+-8" standalone="no" ?>',
                      OutputFile => $xmlFile
   );
};
    if($@) {
        print "Exception: Could not xml file : $xmlFile, Error-$@");
    }

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In reply to out of memory issue while creating very large xml file using XML::Simple by perlCrazy

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