about some question about v$session_wait

 about some question about v$session_wait

i did two test, seem two test result are different  when i view v$session_wait.

first: open twn session , one session is  used for test , the other session is used  for monitor

######one

i do a select stament in the session twice

select * from sys.source$;

select * from sys.source$;

i view the v$session_wait show the sid ' wait event is   SQL*Net message from client

####two

then i did a select statment in the sesion

insert into t select * from sys.source$;

i view the v$session_wait show the sid ' wait event is