Please execute following SQL lines as "sys";
select
1048576+a.value+b.value pga_size
from
v$parameter a,
v$parameter b
where
a.name = 'sort_area_size'
and
b.name = 'hash_area_size';
select
1048576+a.value+b.value pga_size
from
v$parameter a,
v$parameter b
where
a.name = 'sort_area_size'
and
b.name = 'hash_area_size';