> LOG: statement: UPDATE Transactions > SET previous_value = previous_value(id) > WHERE new_value IS NOT NULL > AND new_value <> '' > AND node_id IN (SELECT node_id FROM NodeSegments) > LOG: duration: 16687993.067 ms I hope that I can presume some suggestions that I gleened after finishing my celko book. I don't know if the suggestions presented will help in your case.