An often overlooked criteria in a data warehousing implementation plan and in research is the volume of concurrent user requests accessing the system. A transaction processing monitor control can help a data warehouse meet the strict response requirements of these user requests. TP monitors also bring several other characteristics such as heterogeneous database integration support, a path for incremental growth, good performance tuning support, automatic failure recovery, load balancing, and transactional semantics, all of which are assets to a data warehouse