Primary Server Setup Logging Check that the primary database is in archivelog mode. select log_mode from v$database; LOG_MODE ------------ NOARCHIVELOG SQL> If it is noarchivelog mode, switch is to archivelog mode. shutdown immediate; startup mount; alter database archivelog; alter database open; Enabled forced logging by issuing the following command. alter database force logging; -- Make sure at least one logfile is present. alter system switch logfile; Create standby redo logs on the primary database (in case of switchovers ). The standby redo logs should be at least as big as the largest online redo log and there should be one extra group per thread compared the online redo logs. In my case, the following standby redo logs must be created on both servers. alter database add standby logfile thread 1 group 10 ('/acfspoc/GGTRG_STD/redo4.log') size 50m; alter database add standby logfile thread 1 group 11 ('/ac...