修改redo log 大小【rac+dg】


select * from gv$log;

select * from gv$logfile;

--修改日志大小RAC+DG

select a.*,b.member from gv$log a join gv$logfile b on (a.group#=b.group# and a.inst_id=b.inst_id );

alter database drop logfile group 2;

alter database add logfile group 2

(

'+ORADATA/racdb/redo02a.log',

'+ORADATA/racdb/redo02b.log'

)size 100m reuse;

alter system switch logfile;

---drop报错的话，多switch几次

---备库修改standby_log

---对于standby 上redo的处理之前，我们要先停掉redo 的apply：

alter database recover managed standby database cancel;

startup mount--备份库？？？不需要了？？？

alter database drop logfile group 9;

alter database drop logfile group 10;

alter database drop logfile group 11;

alter database drop logfile group 12;

--新增standby_log 注意路径

alter database add standby logfile thread 1 group 9 ('location/standby_group_01a.log','location/standby_group_01b.log') size 100m;

alter database add standby logfile thread 1 group 10 ('location/standby_group_02a.log','location/standby_group_02b.log') size 100m;

alter database add standby logfile thread 1 group 11 ('location/standby_group_03a.log','location/standby_group_03b.log') size 100m;

alter database add standby logfile thread 1 group 12 ('location/standby_group_04a.log','location/standby_group_04b.log') size 100m;

---修改主库的standby_log

select * from gv$logfile;

alter database drop logfile group 9;

alter database drop logfile group 10;

alter database drop logfile group 11;

alter database drop logfile group 12;

alter database add standby logfile thread 1 group 9 ('+ORADATA/racdb/standbylog/standby_group_01a.log','+ORADATA/racdb/standbylog/standby_group_01b.log') size 100m;

alter database add standby logfile thread 1 group 10 ('+ORADATA/racdb/standbylog/standby_group_02a.log','+ORADATA/racdb/standbylog/standby_group_02b.log') size 100m;

alter database add standby logfile thread 1 group 11 ('+ORADATA/racdb/standbylog/standby_group_03a.log','+ORADATA/racdb/standbylog/standby_group_03b.log') size 100m;

alter database add standby logfile thread 1 group 12 ('+ORADATA/racdb/standbylog/standby_group_04a.log','+ORADATA/racdb/standbylog/standby_group_04b.log') size 100m;

---修改备份库的logfile大小 online 注意路径

READ ONLY WITH APPLY;

alter system set standby_file_management=manual;

alter system set standby_file_management=auto;

--ORA-01156: 进行中的恢复或闪回可能需要访问文件

alter database recover managed standby database cancel;

--restartup 生效

--停止主库

select group#,status from v$log;

alter database clear logfile group 1;

alter database drop logfile group 1;

alter database clear logfile group 2;

alter database drop logfile group 2;

alter database clear logfile group 3;

alter database drop logfile group 3;

alter database add logfile group 1

(

'/home/u01/app/oracle/oradata/RACDB_DG/redo01a.log',

'/home/u01/app/oracle/oradata/RACDB_DG/redo01b.log'

)size 100m reuse;

alter database add logfile group 2

(

'/home/u01/app/oracle/oradata/RACDB_DG/redo02a.log',

'/home/u01/app/oracle/oradata/RACDB_DG/redo02b.log'

)size 100m reuse;

alter database add logfile group 3

(

'/home/u01/app/oracle/oradata/RACDB_DG/redo03a.log',

'/home/u01/app/oracle/oradata/RACDB_DG/redo03b.log'

)size 100m reuse;