Reduce Archive logs

Question

Hi,
I have a database with a schema that gets refreshed nightly (user level export/import). This is generating a lot of redo logs. I have a space crunch for archive log location but cannot turn off archiving.
How could I reduce the redo log generation of the job?
Thanks,
Prachi

Answer 1

if you already have index then yes oracle will mainten it unless it is unusable but if you dont have index then oracle will not create it if you export it with indexes=n
well lets see if thats correct or not...
SQL> create table exp_test(id number,name varchar2(20));
Table created.
SQL> create index exp_test_idx on exp_test(id);
Index created.
SQL> insert into exp_test values(1,'larry');
1 row created.
SQL> insert into exp_test values(2,'bill');
1 row created.
SQL> commit;
Commit complete.
--export table without index
C:\junk>exp scott/tiger file=exp_test_noindex.dmp indexes=n tables=exp_test
. . exporting table EXP_TEST 2 rows exported
Export terminated successfully without warnings.
--export table with index
C:\junk>exp scott/tiger file=exp_test_index.dmp indexes=y tables=exp_test
. . exporting table EXP_TEST 2 rows exported
Export terminated successfully without warnings.
SQL> select index_name from user_indexes where table_name='EXP_TEST';
INDEX_NAME
EXP_TEST_IDX
SQL> DROP TABLE EXP_tEST;
Table dropped.
--import table with indexes
C:\junk>imp scott/tiger file=exp_test_index.dmp tables=exp_test
. . importing table "EXP_TEST" 2 rows imported
Import terminated successfully without warnings.
--index is created
SQL> select index_name from user_indexes where table_name='EXP_TEST';
INDEX_NAME
EXP_TEST_IDX
SQL> drop table exp_test;
Table dropped.
--import table without any indexes
C:\junk>imp scott/tiger file=exp_test_noindex.dmp tables=exp_test
. . importing table "EXP_TEST" 2 rows imported
Import terminated successfully without warnings.
--there is no index
SQL> select index_name from user_indexes where table_name='EXP_TEST';
no rows selected