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This Histogram panel contains a table that lists the values of the selected event attributes. For example, for the Event Thread attribute, the table will list the thread names; for the Bytes Read attribute, the table will list the sizes of read data.
Above the table, there are two dropdown lists. Select the event type in the Event Type list, and then the grouping attribute in the Group By list.
The table contains the following columns:
Group By: The value of the selected event attribute.
Total: The total duration of events with the corresponding value of the selected attribute.
Average: The average duration of events with the corresponding value of the selected attribute.
Count: The number of events with the corresponding value of the selected attribute.
For information about working with tables, see Working with Tables.
You can select the Show Only Operative Set check box above the table to display only the event types from the operative set. For more information about operative sets, see Using Operative Sets.
When you select an event attribute in the Histogram table, a stack trace for that attribute group is displayed in the Traces panel below. It also contains the sample count for each method on the stack.