Oracle User Locked(Timed)

Why Oracle user get locked(timed) ? I had change profile : PASSWORD_LIFE_TIME, PASSWORD_LOCK_TIME, PASSWORD_GRACE_TIME to UNLIMITED, but it doesn’t work.

Then I run audit trail :

  1. alter system set audit_trail=db scope=spfile; (then restart db)
  2. audit connect whenever not successful;
  3. monitoring via this query : 

    SELECT *
    FROM dba_audit_session
    WHERE action_name = ‘LOGON’ AND returncode > 0
    ORDER BY timestamp DESC;

  4. then login fail and then locked because the user password case-sensitive, so I run : alter system set sec_case_sensitive_logon=false;
  5. done ^_^