Oracle归档模式的命令及参数

SQL> archive log list
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 15
Current log sequence 17

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.

Total System Global Area 1258291200 bytes
Fixed Size 1219160 bytes
Variable Size 318768552 bytes
Database Buffers 922746880 bytes
Redo Buffers 15556608 bytes
Database mounted.

SQL> alter database archivelog;

Database altered.

SQL> alter database open;

Database altered.

SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 15
Next log sequence to archive 17
Current log sequence 17

log_archive_start = true

archive log start

SQL> show parameter db_recovery

NAME TYPE VALUE
------------------------------------ ----------- ------------
db_recovery_file_dest string /home/oracle/ora10g/flash_reco
very_area/
db_recovery_file_dest_size big integer 20G

alter system set db_recovery_file_dest_size=21474836480