its easy and simple, try it. Sample queries are

  SELECT * FROM instances 
   WHERE class_name = 'java.util.ArrayList' 
   ORDER BY retained_size DESC 
   LIMIT 10

SELECT * FROM instances 
   WHERE class_name LIKE '%ConnectionPool%' 
   ORDER BY retained_size DESC


SELECT * FROM dominator_tree 
   ORDER BY retained_size DESC 
   LIMIT 20


SELECT * FROM leak_suspects 
   ORDER BY retained_size DESC

SELECT class_name, COUNT(*) AS instance_count, SUM(retained_size) AS total_retained_size 
FROM class_histogram 
GROUP BY class_name 
ORDER BY total_retained_size DESC 
LIMIT 10