文档解释 ORA-16218: This database is already preparing to switch over. Cause: The database was already preparing to switch over and was not able to ……

文档解释 ORA-19853: error preparing auxiliary instance string (error string) Cause: An error was received while managing the automatic auxiliary ins……

文档解释 ORA-16219: This database is not preparing to switch over. Cause: The database was not preparing to switch over. Therefore, it was not possi……