Why is NULL reads so high in my SQL trace?

Question

I have inserted data from a sql trace in a table and I have a problem interpreting the data in table.

In the attached image the reads related to my SP are very low but on the next line for a value of NULL in Text Data column the reads are very high.

How do i interpret this.? Why the NULL rows have so high read values?

Edit: I have updated the image file. Now it has all the column names for initial 10 rows of my trace I could not find any EventType column, but there is an EventClass column which has value : 15 for every NULL row.

Screenshot

Answer 1

Check out the SQL Server Event Class reference. You determine the EventType by EventClass value. Some EventClass types come with a NULL value for TextData.

Also, here's a query that might help you out mapping the EventClass ID to the actual event type:

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

where dbo.Trace is the table where you save the EventClass values.