RAC Parameters That Require Identical Settings
• ACTIVE_INSTANCE_COUNT
• ARCHIVE_LAG_TARGET
• COMPATIBLE
• CLUSTER_DATABASE/CLUSTER_DATABASE_INSTANCES
• CONTROL_FILES
• DB_BLOCK_SIZE
• DB_DOMAIN
• DB_FILES
• DB_NAME
• DB_RECOVERY_FILE_DEST/DB_RECOVERY_FILE_DEST_SIZE
• DB_UNIQUE_NAME
• PARALLEL_EXECUTION_MESSAGE_SIZE
• REMOTE_LOGIN_PASSWORD_FILE
• RESULT_CACHE_MAX_SIZE ----------Disabling the result cache on some instances may lead to incorrect results.
• UNDO_MANAGEMENT
dml_locks