SSIS : big load and outofmemory exception - sql-server

Question

I'm currently working with Integration Services (SSIS) to load a big amount of XML files into a SQL server database. Each XML file content needs to be dispatched in several tables. I have at least 10000 xml files to load using the process. Everything works fine till 6000 files are loaded. After 6000 treatment, I always got an OutOfMemoryException from my first dataflow task, the first in the process.
In this script component, I just check if a value from a XML file is already present in a specific database table. If it is present, I return the matched ID, otherwise, I add a new record. To achieve it, I use a Lookup component. I use it with No cache option, for memory matter. Then in case of matching, I process the return ID in a script component. Like I said, everything works fine until more or less 6000 files are processed. After I got :
Description : System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.HandleUserException(Exception e)
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.PreExecute()
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostPreExecute(IDTSManagedComponentWrapper100 wrapper)
Do you have some suggestions or some ressources which deal with performance and memory issue in SSIS ? Do you encountered similar problem ? DO you have an idea from where this memory problem could come from?
Thanks :)
EDIT:
Here is the code to check an XML against an XSD file. Can you see any memory leak?
public void Main()
{
try
{
XmlReaderSettings settings = new XmlReaderSettings();
settings.Schemas.Add("", Dts.Variables["XSDFilePath"].Value.ToString());
settings.ValidationType = ValidationType.Schema;
using (XmlReader reader = XmlReader.Create(Dts.Variables["XMLFilePath"].Value.ToString(), settings))
{
XmlDocument document = new XmlDocument();
document.Load(reader);
ValidationEventHandler eventHandler = new ValidationEventHandler(XMLValidationHandler);
document.Validate(eventHandler);
}
if (ValidationResult)
{
Dts.TaskResult = (int)ScriptResults.Success;
}
else
{
Dts.TaskResult = (int)ScriptResults.Failure;
}
}
catch (Exception ex)
{
Dts.TaskResult = (int)ScriptResults.Failure;
}
}
private void XMLValidationHandler(object sender, ValidationEventArgs e)
{
switch (e.Severity)
{
case XmlSeverityType.Error:
Console.WriteLine("Warning {0}", e.Message);
ValidationResult = false;
break;
case XmlSeverityType.Warning:
Console.WriteLine("Warning {0}", e.Message);
break;
}
}

Answer 1

Don't use the XMLDocument Object, It will load the entire document into memory and is likely the cause of your memory problem. Try instead to use the XmlValidatingReader
http://msdn.microsoft.com/en-us/library/system.xml.xmlvalidatingreader.aspx
It should provide a more efficient use of memory.

Answer 2

Refer to the 'answers' in this.,
http://social.msdn.microsoft.com/Forums/en-US/sqlintegrationservices/thread/4d90afc8-0a1c-418f-9e3a-0b766f581b2c/