Parameters that Require Identical Settings in All the Instances

• Parameters that Require Identical Settings in All the Instances 

• COMPATIBLE 
• CLUSTER_DATABASE 
• CONTROL_FILES 
• DB_BLOCK_SIZE 
• DB_DOMAIN DB_FILES 
• DB_NAME DB_RECOVERY_FILE_DEST 
• DB_RECOVERY_FILE_DEST_SIZE 
• DB_UNIQUE_NAME 
• INSTANCE_TYPE 
• PARALLEL_EXECUTION_MESSAGE_SIZE 
• REMOTE_LOGIN_PASSWORDFILE 
• UNDO_MANAGEMENT

Parameters that Require Unique Settings

• INSTANCE_NAME
•  INSTANCE_NUMBER
•  UNDO_TABLESPACE 
• CLUSTER_INTERCONNECTS 
• ROLLBACK_SEGMENTS