java - tomcat hibernate 导致启动慢

Question

目前我的应用程序使用 Tomcat 6 和 hibernate 3，但我注意到启动非常慢，我只映射了大约 40 个实体。不确定这是否是由 hibernate 引起的，日志如下:

以下内容大约需要 5 分钟:

有什么想法吗？顺便说一句，我已经尝试过增加 tomcat 内存

2016-03-01 09:18:53,933  INFO [main] SessionFactoryObjectFactory.addInstance(105) | Not binding factory to JNDI, no JNDI name configured
2016-03-01 09:24:42,046 DEBUG [main] GnrlLookupView.<clinit>(37) | Registering view: GnrlLookupView
2016-03-01 09:24:46,881  INFO [main] QuartzScheduler.<init>(209) | Quartz Scheduler v.1.6.0 created.

hibernate 配置:

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource"> <ref bean="dataSource" /> </property>
    <property name="mappingJarLocations">
        <list>
            <value>WEB-INF/lib/*-hbm.jar</value>
        </list> 
    </property>
    <property name="lobHandler">
        <bean class="org.springframework.jdbc.support.lob.OracleLobHandler">
            <property name="nativeJdbcExtractor">
                <bean class="org.springframework.jdbc.support.nativejdbc.SimpleNativeJdbcExtractor" />
            </property>
        </bean>
    </property>     
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
            <prop key="hibernate.connection.SetBigStringTryClob">true</prop>
            <prop key="hibernate.cache.use_second_level_cache">true</prop>  <!-- Explicitly enabled 2nd level cache since upgrade to hibernate version 3.2.x -->
            <prop key="hibernate.cache.use_query_cache">true</prop>
            <prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>
        </props>
    </property>

    <property name="entityInterceptor">
        <ref bean="entityAuditInterceptor" />
    </property>
</bean>

<!-- Transaction manager for a single Hibernate SessionFactory (alternative to JTA) --> 
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name="sessionFactory">
        <ref local="sessionFactory" />
    </property>
</bean>ref bean="entityAuditInterceptor" />
    </property>
</bean>

<!-- Transaction manager for a single Hibernate SessionFactory (alternative to JTA) --> 
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name="sessionFactory">
        <ref local="sessionFactory" />
    </property>
</bean>

更新:我启用了更精细的日志记录并来到下面，它打印出下面的内容 5 分钟，知道吗？

SessionFactoryUtils.doGetSession(316) | Opening Hibernate Session
2016-03-01 10:46:45,468 DEBUG [main] OracleLobHandler.getClobAsString(229) | Returning Oracle CLOB as string
2016-03-01 10:46:45,468 DEBUG [main] OracleLobHandler.getClobAsString(229) | Returning Oracle CLOB as string
2016-03-01 10:46:45,468 DEBUG [main] OracleLobHandler.getClobAsString(229) | Returning Oracle CLOB as string
2016-03-01 10:46:45,483 DEBUG [main] OracleLobHandler.getClobAsString(229) | Returning Oracle CLOB as string
2016-03-01 10:46:45,483 DEBUG [main] OracleLobHandler.getClobAsString(229) | Returning Oracle CLOB as string
2016-03-01 10:46:45,483 DEBUG [main] OracleLobHandler.getClobAsString(229) | Returning Oracle CLOB as string

2016-03-01 10:44:43,487 DEBUG [main] HibernateTemplate.flushIfNecessary(389) | Eagerly flushing Hibernate session
2016-03-01 10:44:43,487 DEBUG [main] SessionFactoryUtils.closeSession(789) | Closing Hibernate Session
2016-03-01 10:44:43,487 DEBUG [main] SessionFactoryUtils.doGetSession(316) | Opening Hibernate Session

Answer 1

找到答案不是由于 hibernate 设置，似乎在启动期间应用程序正在加载大量表并试图保存在缓存中。