Why is NULL read so high in my SQL trace?

Question

I inserted data from sql table into table and I have problem interpreting data in table.

In the attached image, the reading associated with my SP is very low, but on the next line for the NULL value in the Text Data column, the reading is very large.

How do I interpret this? Why do NULL strings have such high read values?

Edit: I updated the image file. Now it has all the column names for the initial 10 lines of my trace. I could not find the EventType column, but there is an EventClass column that has a value of: 15 for each row NULL.

Screenshot

Answer 1

SQL Server. EventType EventClass. EventClass NULL TextData.

, , EventClass :

SELECT   te.name
FROM     dbo.Trace t 
         JOIN sys.trace_events te ON t.EventClass = te.trace_event_id

dbo.Trace - , EventClass.