Hibernate QueryPlanCache is occupying 3.5MB at EAR startup in Weblogic.

Env details:
Weblogic 10.3.3
2 data sources for Intersystems Cache Systems
Hibernate-core-3.6.7-Final
Spring 3.0.0.RELEASE
Strong and Soft references are set as 32MB.
<prop key="hibernate.query.plan_cache_max_strong_references">32</prop>
<prop key="hibernate.query.plan_cache_max_soft_references">32</prop>

Is there any attribute to ingnore QueryPlanCache on hibernate session?

Thanks in advance.