xerces and memory usage

[nagarajsherigar]

i am using xerces 2.8.0 in linux platform.For each xml file(very huge file) parsing i can see huge memory increase.

Below is the sample code

#include <xercesc/util/PlatformUtils.hpp>
#include <xercesc/parsers/XercesDOMParser.hpp>
#include <xercesc/dom/DOM.hpp>
#include <xercesc/util/XMLString.hpp>
#include <xercesc/util/PlatformUtils.hpp>

using namespace xercesc;

class ParseWrite
{
XercesDOMParser* parser;
DOMDocument * pDoc;

public:
ParseWrite()
{
try
{
XMLPlatformUtils::Initialize();
} catch(...)
{
}

parser = new XercesDOMParser();
parser->setValidationScheme(XercesDOMParser::Val_Never);
parser->setDoNamespaces(false);
parser->setDoSchema(false);
parser->setValidationSchemaFullChecking(false);
parser->setLoadExternalDTD(false);
pDoc = 0;
}

~ParseWrite()
{
delete parser;
XMLPlatformUtils::Terminate();
}

int Parse(const char * infile)
{
parser->parse(infile);
pDoc = parser->getDocument();

//Traversing code here

parser->resetDocumentPool();
return 0;
}
};

ParseWrite Parser;

int main(int argc,char** argv)
{
if(argc < 2)//check atleast 1 file is passed
return 0;

for(int i = 1; i < argc; i++)
{
Parser.Parse(argv[i]);
sleep(10);
somefun();
someotherfun();
}

//some other code blocks

return 0;
}

Note: Invoked sleep() after each file parse to check whether the memory is released,its not.any way to release the memory before the next parse starts?