Take the 2-minute tour ×

I am using JProfiler to view all the JDBC calls in my application that's using Hibernate. It turns out that the top 2 hot spots are "unknown" and "select 1". Any ideas what they are?

enter image description here

share|improve this question
add comment

2 Answers

up vote 2 down vote accepted

The "select 1" is a check to see if the connection is still valid. Can also be "select 1 from dual" or "select 1+1" depending on database used.

share|improve this answer
add comment

Adding to Roger Lindsjö's answer, the "unknown" hot spot is a bug that has been fixed in JProfiler 7.0.1.

share|improve this answer
add comment

Your Answer


