一、Oracle 19c 告警日誌
2020-01-19 20:40:26.193000 +08:00
Warning: ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE has been deprecated.
Warning: ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE has been deprecated.
alter database recover managed standby database using current logfile disconnect from session告警提示USING CURRENT LOGFILE 已經廢棄掉了。還好Oracle得很多命令是向後兼容得，按照原有得執行方式也不會有問題。
二、官方文檔得使用方法
To start apply services on a physical standby database, ensure the physical standby database is started and mounted and then start Redo Apply.
Start apply services on a physical standby database as follows:
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE;
This also automatically enables real-time apply provided the standby database is configured with a standby redo log and is in ARCHIVELOG mode.
--在Oracle 12c以後自動啓動實時應用，備庫需要配置standby redo log和打開歸檔日誌。
Redo Apply can be run either as a foreground session or as a background process. To start Redo Apply in the foreground, issue the following SQL statement:
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE;
If you start a foreground session, control is not returned to the command prompt until recovery is canceled by another session.
To start Redo Apply in the background, include the DISCONNECT keyword on the SQL statement. For example:
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT;
--以後使用以上命令啓動實時應用進程，還可以少敲一些命令，挺好挺好。
or
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING ARCHIVED LOGFILE DISCONNECT;
This statement starts a detached server process and immediately returns control to the user. While the managed recovery process is performing recovery in the background, the foreground process that issued the RECOVER statement can continue performing other tasks. This command does not disconnect the current SQL session.三、小結
1、不太忙得時候多看看數據庫得告警日誌，總會有新得發現。
2、每天看半個小時得官方文檔，尤其是新版本得文檔，還可以多學習學習英文，還是不錯得。