ORA-16076: unknown standby database destination
Cause: A standby database destination was specified that was not accessed by another instance. If the initialization parameter LOG_ARCHIVE_CONFIG does not define a DG_CONFIG, this mismatch may be due to a standby database having been restarted recently.
Action: Ensure that at each instance the set of standby databases referred to by LOG_ARCHIVE_DEST_n initialization parameters is the same and define a DG_CONFIG at each instance to identify those databases explicitly.
ORA-16076: unknown standby database destination指的是当连接至某一数据库实例时，数据库无法找到其备用数据库的位置的错误。
ORA-16076: unknown standby database destination
Cause: An attempt was made to start the physical standby database but the STANDBY_FILE_MANAGEMENT initialization parameter has not been set to AUTO.
Action: Set the STANDBY_FILE_MANAGEMENT initialization parameter to AUTO in the standby database and then startup mount the database.
此错误通常会在Oracle的Dataguard环境中出现。当客户尝试启动物理备用数据库时，STANDBY_FILE_MANAGEMENT初始化参数并未设为AUTO时就会出现此错误。
1.确保物理备份数据库处于Mounted状态。
2. update the initialization parameter STANDBY_FILE_MANAGEMENT with the following SQL query:
ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT = AUTO;
3.启动重新启动物理备用数据库：
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE;