hibernate persistence configuration

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence">
    <persistence-unit name="xxx" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <mapping-file>META-INF/orm-oracle.xml</mapping-file>
       
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
            <property name="hibernate.show_sql" value="false" />
            <property name="hibernate.jdbc.batch_size" value="100" />
           
            <property name="hibernate.cache.use_query_cache" value="true" />
            <property name="hibernate.cache.use_second_level_cache" value="true" />
            <property name="hibernate.cache.provider_class" value="net.sf.ehcache.hibernate.EhCacheProvider"/>
            <property name="net.sf.ehcache.configurationResourceName" value="/ehcache.xml" />
        </properties>
    </persistence-unit>
</persistence>