PL/SQL :: Scheduling Jobs - Without Commit Records Are Getting Inserted

Oracle DB Version - 11g XE I scheduled a job using dbms_scheduler which will insert a record into table T for each minute. I didnt mention COMMIT inside my procedure but records are being commited after each successful execution. How come it is possible. Here is my code.

SQL> create table t ( empno number, creation_date date);
Table created
SQL> create or replace procedure test_proc  2  is  3    4  begin  5    6    insert into t values (1,sysdate);  7    8  end;  9  /
Procedure created

[Code]....

PL/SQL procedure successfully completed

SQL> select * from t;
     EMPNO CREATION_DATE---------- -------------         1 11/12/2013 11         1 11/12/2013 11         1 11/12/2013 11         1 11/12/2013 11         1 11/12/2013 12         1 11/12/2013 12         1 11/12/2013 12         1 11/12/2013 12         1 11/12/2013 12

9 rows selected