DB스토리

ASMM 좋으나 증상기반 메모리값 변경이어서 느려진후에야 설정 바꿈. Buff Cache S SYS> show parameter db_block NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_block_buffers integer 0 db_block_checking string FALSE db_block_checksum string TRUE db_block_size integer 8192 S SYS> show parameter cache_size NAME TYPE VALUE ------------------------------------ ----------- --------..

논리적 => index rebuild 물리적 => BMR (Block Media Recovery) -- tablespace 옮기기. S SCOTT> select table_name,tablespace_name from user_tables where table_name='EMP'; TABLE_NAME TABLESPACE_NAME ------------------------------ ------------------------------ EMP USERS S SCOTT> alter table emp move tablespace example; Table altered. S SCOTT> select table_name,tablespace_name from user_tables where table_name..

Database drop table query version query transaction query Restoring tables from the Recycle Bin --Rename S SCOTT> create table emp18 as select * from emp; Table created. S SCOTT> drop table emp18; Table dropped. S SCOTT> create table emp18 as select * from emp; Table created. S SCOTT> show recyclebin ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME ---------------- ---------------------------..

불완전 복구. DB 전체의 datafile만 restore하고(control file 과 redo는 제외) Archive 와 redo를 일부만 적용시켜 과거버전으로 복구 함. User_managed Incomplete Recovery -- 시간 알아내기. S SYS> create table hr.emp2 as select * from scott.emp; Table created. S SYS> select systimestamp from dual; SYSTIMESTAMP --------------------------------------------------------------------------- 22-JUN-09 03.00.23.411459 PM +09:00 S SYS> !date Mon Jun ..