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