@techreport{weko_178870_1, author = "Keiko,Tanigawa and Kazuya,Hisaki and Keisuke,Hatasaki", title = "Operating System Integrated Tracer for Database Management System in Big Data Processing", year = "2017", institution = "Research & Development Group, Hitachi, Ltd., Research & Development Group, Hitachi, Ltd., Research & Development Group, Hitachi, Ltd.", number = "12", month = "may" }