oracle归档日志步骤+RMAN步骤
set ORACLE_SID=EKP
sqlplus /nolog
conn / as sysdba
SQL> archive log list;
show parameter db_reco
show parameter log_archive
alter system set db_recovery_file_size=20G;
SQL> shutown immediate
SQL> conn / as sysdba
SQL> startup mount
SQL> alter database archivelog; 启动归档
SQL> alter database open;
SQL> archive log list;
改变为20G
SQL〉alter system switch logfile;
show all;
configure controlfile autobackup on; 启动控制文件自动备份
configure retention policy to redundancy 4; 备份策略，4个版本
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