archivelog歸檔模式
SQL>select log_mode from V$database;
LOG_MODE
------------
NOARCHIVELOG
如上結果為非歸檔模式。
SQL>shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL>startup mount;
ORACLE instance started.
Total System Global Area 1503199232 bytes
Fixed Size 2115136bytes
Variable Size 805308864bytes
Database Buffers 687865856bytes
Redo Buffers 7909376bytes
Database mounted.
SQL>alter database archivelog;
Database altered.
再次檢視執行模式,需先啟動資料庫SQL>alter database open;
Database altered.
SQL>select log_mode from V$database;
LOG_MODE
------------
ARCHIVELOG檢查歸檔模式命令
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archivedestination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 5
Next log sequence to archive 7
Current log sequence 7