Hibernate　キャッシュ - ２次キャッシュとクエリキャッシュの設定及び使い方

create table FATHER (
    ID integer not null,
    NAME varchar(100),
    primary key (ID)
);
create table SON (
    id integer not null,
    NAME varchar(100),
    FATHER_ID integer not null,
    primary key (id)
);
alter table SON 
    add index FK1417282DD016B (FATHER_ID), 
    add constraint FK1417282DD016B 
    foreign key (FATHER_ID) 
    references FATHER (ID);

<hibernate-configuration>
    <session-factory>
        <!-- 抜粋 -->

        <!-- SQL出力 -->
        <property name="show_sql">true</property>

        <!-- クエリキャッシュの設定 -->
        <property name="hibernate.cache.use_query_cache">true</property>
        <!-- キャッシュのプロバイダーの設定 -->
        <property name="hibernate.cache.provider_class">
            org.hibernate.cache.EhCacheProvider
        </property>

        <!-- Mapping files -->
        <mapping resource="Father.hbm.xml"/>
        <mapping resource="Son.hbm.xml"/>
        
        <!-- クラスレベルのキャッシュ -->
        <class-cache class="eg.Father" usage="nonstrict-read-write"/>
        <class-cache class="eg.Son" usage="nonstrict-read-write"/>

        <!-- コレクションレベルのキャッシュ -->
        <collection-cache collection="eg.Father.sonSet" usage="read-write"/>
    </session-factory>
</hibernate-configuration>

<hibernate-mapping>
    <class name="eg.Father" table="FATHER">
        <!-- クラスレベルのキャッシュ -->
        <cache usage="read-write"/>
        
        <id name="id" unsaved-value="0" column="ID">
             <generator class="increment"/>
        </id>

        <set name="sonSet" ...>
             <!-- コレクションレベルのキャッシュ -->
             <cache usage="read-write"/>
             
             <key column="FATHER_ID"/>
             <one-to-many class="eg.Son"/>
        </set>

        ...
    </class>
</hibernate-mapping>

<cache 
    usage="transactional|read-write|nonstrict-read-write|read-only"  (1)
    region="RegionName"                                              (2)
    include="all|non-lazy"                                           (3)
/>

<ehcache>
    <diskStore path="/usr/local/cache/hibernate/"/>

    <defaultCache
        maxElementsInMemory="10000"
        eternal="false"
        timeToIdleSeconds="1200"
        timeToLiveSeconds="1200"
        overflowToDisk="true"
        />
        
    <!-- cache hibernate entity -->
    <cache name="eg.Father"
        maxElementsInMemory="50"
        eternal="true"
        overflowToDisk="false"
        />
    <cache name="eg.Son"
        maxElementsInMemory="300"
        eternal="true"
        overflowToDisk="false"
        />
    <cache name="eg.Father.sonSet"
        maxElementsInMemory="100"
        eternal="true"
        overflowToDisk="false"
        />
</ehcache>