you should have eviction enabled and a cache loader with passivation.

    <eviction wakeUpInterval="500">

        <default algorithmClass="org.jboss.cache.eviction.LRUAlgorithm" eventQueueSize="200000">

            <property name="maxNodes" value="5000"/>

            <property name="timeToLive" value="1000"/>

        </default>

        <region name="/org/jboss/data1">

            <property name="timeToLive" value="2000"/>

        </region>

        <region name="/org/jboss/data2" algorithmClass="org.jboss.cache.eviction.FIFOAlgorithm" eventQueueSize="100000">

            <property name="maxNodes" value="3000"/>

            <property name="minTimeToLive" value="4000"/>

        </region>

    </eviction>

 

    <!--

       Cache loaders.

 

       If passivation is enabled, state is offloaded to the cache loaders ONLY when evicted.  Similarly, when the state

       is accessed again, it is removed from the cache loader and loaded into memory.

 

       Otherwise, state is always maintained in the cache loader as well as in memory.

 

       Set 'shared' to true if all instances in the cluster use the same cache loader instance, e.g., are talking to the

       same database.

    -->

    <loaders passivation="true" shared="false">

        <preload>

            <node fqn="/org/jboss"/>

            <node fqn="/org/tempdata"/>

        </preload>

 

        <!--

           we can have multiple cache loaders, which get chained

        -->

        <loader class="org.jboss.cache.loader.JDBCCacheLoader" async="true" fetchPersistentState="true"

                ignoreModifications="true" purgeOnStartup="true">

 

            <properties>

                cache.jdbc.table.name=jbosscache

                cache.jdbc.table.create=true

                cache.jdbc.table.drop=true

                cache.jdbc.table.primarykey=jbosscache_pk

                cache.jdbc.fqn.column=fqn

                cache.jdbc.fqn.type=VARCHAR(255)

                cache.jdbc.node.column=node

                cache.jdbc.node.type=BINARY

                cache.jdbc.parent.column=parent

                cache.jdbc.driver=org.hsqldb.jdbcDriver

                cache.jdbc.url=jdbc:hsqldb:mem:jbosscache

                cache.jdbc.user=sa

                cache.jdbc.password=

            </properties>

            <!-- alternatively use a connection from a datasorce, as per the code sample below-->

            <!--<properties>-->

            <!--cache.jdbc.datasource=AllSampleDS-->

            <!--cache.jdbc.table.name=jbosscache-->

            <!--cache.jdbc.table.create=true-->

            <!--cache.jdbc.table.drop=true-->

            <!--</properties>-->

            <singletonStore enabled="true" class="org.jboss.cache.loader.SingletonStoreCacheLoader">

                <properties>

                    pushStateWhenCoordinator=true

                    pushStateWhenCoordinatorTimeout=20000

                </properties>

            </singletonStore>

        </loader>

    </loaders>