default value of db_file_multiblock_read_count

 Hi,
I have 10gr2(10.2.0.4.0) database used for datawarehouse purpose. DB is hosted on IBM server with 8k block size.I checked the following parameters in database as well :

db_block_size                               integer     8192
db_file_multiblock_read_count        integer     128

I also read that onw should not set db_file_multiblock_read_count(  http://www.dba-oracle.com/t_automatically_tuned_multiblock_reads.htm )
then I checked the following query :

select * from gv$parameter where name='db_file_multiblock_read_count' ;

INST_ID    NUM    NAME                                         TYPE    VALUE    DISPLAY_VALUE    ISDEFAULT    ISSES_MODIFIABLE    ISSYS_MODIFIABLE    ISINSTANCE_MODIFIABLE    ISMODIFIED    ISADJUSTED    ISDEPRECATED    DESCRIPTION    UPDATE_COMMENT    HASH