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Poor performance of session.createSQLQuery() vs Session.doWo

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pagrus

Post subject: Poor performance of session.createSQLQuery() vs Session.doWo

Posted: Thu May 20, 2010 10:32 am

Newbie

Joined: Tue Apr 25, 2006 11:49 am
Posts: 2

Hi,

I'm facing weird difference in performance of SQL queries when I run it using session.createSQLQuery().

* query using Session.doWork() + jdbc API takes ~2 seconds.
* Same for sqlplus/Sql Developer
* very same SQL query ran using session.createSQLQuery() takes over 10 seconds.

I see that application spends time in AbstractBatcher.getResultSet(), the "ResultSet rs = ps.executeQuery();" line. Also I verified via "org.hibernate.SQL" category that SQL statement is indeed the same.

Any ideas what could cause such a difference?

hibernate 3.3.1
Spring 2.5.6, HibernateTemplate
Oracle RAC 11g

Thanks,
Pavel

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