select name 
from (select sql_id from v$sql where rownum=1) s
    , v$sql_optimizer_env e 
where s.sql_id=e.sql_id
  and (name like '%target%' or name like '%mem%');

NAME
----------------------------------------
pga_aggregate_target
optimizer_inmemory_aware
inmemory_force
inmemory_query
inmemory_size

SQL> ;
  1  select name
  2  from (select sql_id from v$sql where rownum=1) s
  3      , v$sql_optimizer_env e
  4  where s.sql_id=e.sql_id
  5*   and (name like '%target%' or name like '%mem%' or name like '%size%')
SQL> /

NAME
----------------------------------------
hash_area_size
bitmap_merge_area_size
sort_area_size
sort_area_retained_size
pga_aggregate_target
_pga_max_size
workarea_size_policy
parallel_execution_message_size
optimizer_inmemory_aware
inmemory_force
inmemory_query
inmemory_size