如何启动或关闭数据库的归档模式

2025-04-07 08:40:32
推荐回答(1个)
回答1:

查看oracle数据库是否为归档模式
SQL> select name,log_mode from
V$database;

NAME LOG_MODE
------------------
------------------------
TEST NOARCHIVELOG

SQL> archive log list

Database log mode No Archive Mode
Automatic archival Disabled

Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence
80157
Current log sequence 80163

编辑本段配置数据库的归档模式

1.改变非归档模式到归档模式:   
1)SQL> conn / as sysdba (以DBA身份连接数据库)   

2)SQL> shutdown immediate;(立即关闭数据库)   
3)SQL> startup mount
(启动实例并加载数据库,但不打开)   
4)SQL> alter database archivelog; (更改数据库为归档模式)   

5)SQL> alter database open; (打开数据库)   
6)SQL> alter system archive
log start; (启用自动归档)   
7)SQL> exit (退出)   

做一次完全备份,因为非归档日志模式下产生的备份日志对于归档模式已经不可用了.这一步非非常重要!
2.改变归档模式到非归档模式:   

1)SQL>SHUTDOWN NORMAL/IMMEDIATE;   
2)SQL>STARTUP MOUNT;   

3)SQL>ALTER DATABASE NOARCHIVELOG;   
4)SQL>ALTER DATABASE OPEN;

3.归档相关命令
archive log stop;
archive log start;
archive log list;

show parameters;
show parameters log_archive_start;
show
parameters log_archive_max_process; #归档进程数
alter system set
log_archive_max_process=5; #将归档进程数改为5
select * from v$bgprocess; #检察后台进程

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