Uploading large files to share point causes OOM issue

Question

When uploading large files to sharepoint i got OOM exception.The issue i think is because of posting large base64 encoding string in the soap request .

here is a part of my soap request

  <Fields>
    <FieldInformation Type="Invalid or Integer or Text or Note or DateTime or Counter or Choice or Lookup or Boolean or Number or Currency or URL or Computed or Threading or Guid or MultiChoice or GridChoice or Calculated or File or Attachments or User or Recurrence or CrossProjectLink or ModStat or AllDayEvent or Error" DisplayName="string" InternalName="string" Id="guid" Value="string" />
    <FieldInformation Type="Invalid or Integer or Text or Note or DateTime or Counter or Choice or Lookup or Boolean or Number or Currency or URL or Computed or Threading or Guid or MultiChoice or GridChoice or Calculated or File or Attachments or User or Recurrence or CrossProjectLink or ModStat or AllDayEvent or Error" DisplayName="string" InternalName="string" Id="guid" Value="string" />
  </Fields>
  <Stream>base64Binary</Stream>//Here OOM occured in case of large files
</CopyIntoItems>