Which session is generating the redo ?

select username, sid, value, sql_id, prev_sql_id
from ( select username,s.sid, value, sql_id, prev_sql_id 
from v$session u, v$sesstat s, v$statname n
where n.name = 'redo size'
and s.statistic# = n.statistic#
and u.sid = s.sid order by value desc )
where rownum <= 10
order by value desc
/