DB스토리

DB 청소 schema tablespace datafile크기 Instance recovery = redo + undo 적용 checkpoint = buffer cache 저장, 강제로 할때는 alter system set checkpoint; Mean-Time-Between-Failures(MTBF) : 길수록 좋음 Mean-Time-To-Recover(MTTR) : 짧을 수록 좋음 :오라클용어로=> Instance Recorvery시간으로 해석 Categories of Failures Statement failure : 구문 에러 User process failure Network failure User error Instance failure Media failure by BNR로 고침 Multip..