
可能一、
查看 select group#, thread#, sequence#, bytes, archived, status from v$standby_log; 关mrp alter database recover managed standby database cancel; 改standby_file_management状态 alter system set standby_file_management='MANUAL' scope=both; 删standby redo alter database drop standby logfile group 7; 建新的standby redo(reuse:指定了如果standby redo log文件已经存在,是否可以覆盖它。如果不指定这个参数, 那么当standby redo log文件已经存在时,命令会失败) alter database add standby logfile thread 1 group 8 '/U01/app/oracle/fra/test/onlinelog/standbylog08.log' size 100m reuse; 改standby_file_management状态 alter system set standby_file_management='AUTO' scope=both; 开mrp alter database recover managed standby database using current logfile disconnect from session;
可能二、
1.比对主库redo和备库standb redo的 thread、大小、blocksize
大小、thread
redo
select member,group# from v$logfile;
select group#,thread#,SEQUENCE#,BYTES,BLOCKSIZE,status,bytes/1024/1024 M from v$log;
standby redo
select group#, thread#, sequence#, bytes,BLOCKSIZE , status from v$standby_log;
standby redo 同个thread,最少2个,可以轮换。
blocksize
blocksize正常是512
影响的因素:
系统、存储物理扇区
系统:
物理扇区:
物理扇区4096,那建redo就可以指定blocksize了。
alter database add standby logfile thread 9 '/tmp/soft/app/oracle/oradata/WLH/onlinelog/sta_redo05.log' size 1073741824 blocksize 4096;
alter database add logfile thread 9 '/tmp/soft/app/oracle/oradata/WLH/onlinelog/sta_redo05.log' size 1073741824 blocksize 4096;
注意:
如果主库同个thread,既有512,又有4096
要开实时应用的话,备库需要blocksize 4096、512的standby redo 都有才行,不然会报错
RFS[16]: No standby redo logfiles available for thread 1
