ORA-07445: exception encountered: core dump [%s] [%s]

현상 : ORA-07445: exception encountered: core dump [%s] [%s]
           Cause: An OS exception occurred which should result in the
                  creation of a core file.  This is an internal error.
          Action: Contact your customer support representative.
 

원인 : initSID.ora 화일의 db_file_multiblock_read_count parameter 값이 O/S에 의해 handle 될 수 있는 값보다 높기 때문에 발생.
 

조치 : db_file_multiblock_read_count 의 값을 default 값(8)으로 줄이는 것.
       Note: db_file_multiblock_read_count cannot be higher than
             (max_io_size/db_block_size).
             The kernel parameter max_io_size is os dependent paramter.