APPEND (direct path) - redo size

Question

I am sure, I might be missing something obvious. I am under the impression that DIRECT PATH loads (such as inserts with APPEND hint )would generate less redo. But, not sure why I am seeing this...
Regular Insert (Not direct path):
====================
SQL> insert into c2 Select * from dba_objects where rownum < 301;
300 rows created.
Statistics
10 recursive calls
74 db block gets
353 consistent gets
1 physical reads
*31044 redo size*
821 bytes sent via SQL*Net to client
752 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
2 sorts (memory)
0 sorts (disk)
300 rows processed
Direct Path Insert
===========
SQL> insert /*+ APPEND */ into c2 Select * from dba_objects where rownum < 301;
300 rows created.
Statistics
8 recursive calls
13 db block gets
346 consistent gets
1 physical reads
*39048 redo size*
809 bytes sent via SQL*Net to client
770 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
300 rows processed
Not sure, why am I seeing more redo being generated with DIRECT PATH .... either I am missing something obvious or got the DIRECT PATH load completely wrong...would really appreciate any help with this.

Answer 1

Hello,
Check out this thread:
[http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:3224814814761]
Additionally, if you were to switch off logging at the table level, before the INSERT, you should see a (further) reduction in redo:
ALTER TABLE your_table NOLOGGING;