This is information about a Logical Standby. You state you have a physical and version 10.2.
See '184.108.40.206 DDL Transactions Containing File Specifications' in the Data Guard Concepts and Administration doc http://docs.oracle.com/cd/B14117_01/server.101/b10823/manage_ls.htm
select tablespace_name, file_name, autoextensible from dba_data_files;
rp0428 wrote:The OP specified physical standby, not logical.
This will depend upon this parameter :
If set to AUTO as shown then the filesize will change on the Primary. If set to MANUAL then it won't.
I don't see anything in your doc reference that confirms that statement.
Also, can you please reconcile your statement with the excerpt from the doc that I quoted above.
9.1.12 Recovering from Errors
Logical standby databases maintain user tables, sequences, and jobs. To maintain other objects, you must reissue the DDL statements seen in the redo data stream.