oracle apex charging debug

1DECLARE
2    l_value varchar2(100) := 'test value';
3    l_long_msg VARCHAR2(32767) := 'output anything up to varchar2 limit';
4BEGIN
5    APEX_DEBUG_MESSAGE.ENABLE_DEBUG_MESSAGES(p_level => 3);  -- 1 is most important
6    APEX_DEBUG_MESSAGE.LOG_MESSAGE(					-- Short message (4000 max)
7        p_message => 'l_value = ' || l_value, p_level => 1 ); 
8    APEX_DEBUG_MESSAGE.LOG_LONG_MESSAGE(
9        p_message => l_long_msg, p_level => 1 );   	-- Long message   
10    APEX_DEBUG.INFO('Information message');
11END;

1PROCEDURE my_proc (p_id IN NUMBER, p_emp IN emp%ROWTYPE) IS
2BEGIN
3    APEX_DEBUG.ENTER('my_proc', 'p_id', p_id, 'p_emp.id' , p_emp.id);
4    APEX_DEBUG.LOG_PAGE_SESSION_STATE;	-- saves all items
5    MY_PACKAGE.MY_FUNCTION;				
6    APEX_DEBUG.LOG_DBMS_OUTPUT(p_prefix=>'[Debug] ');
7    APEX_DEBUG.INFO('my_proc successfully finished.');
8EXCEPTION
9    WHEN OTHERS THEN APEX_DEBUG.ERROR('Critical error %s', sqlerrm);
10        RAISE;
11END;

1SELECT adb.APEX_USER,
2       adb.APPLICATION_ID, wal.APPLICATION_NAME, adb.PAGE_ID,
3       adb.MESSAGE, adb.MESSAGE_TIMESTAMP,
4       adb.PAGE_VIEW_ID, adb.SESSION_ID
5FROM APEX_WORKSPACE_ACTIVITY_LOG wal
6INNER JOIN APEX_DEBUG_MESSAGES adb
7ON wal.DEBUG_PAGE_VIEW_ID = adb.PAGE_VIEW_ID;

1SELECT * FROM APEX_WORKSPACE_ACTIVITY_LOG 
2    WHERE WORKSPACE = 'wks_name'
3    AND APEX_USER = 'user_name'
4    AND APPLICATION_ID = 'app_id';
5    
6SELECT * FROM APEX_DEBUG_MESSAGES;