小编Flo*_*der的帖子

我正在使用hibernate和c3p0连接池插入,更新和删除许多分离的对象.问题是hibernate不会批处理语句,而是执行a

select @@session.tx_read_only

每个session.persist/insert/update/delete(object)之间.分析sql-connection它看起来像这样:

select @@session.tx_read_only
insert...
select @@session.tx_read_only
insert...
select @@session.tx_read_only
insert...
select @@session.tx_read_only
insert...
select @@session.tx_read_only
insert...
select @@session.tx_read_only

选择@@ session.tx_rad_only总是返回"0"(当然).无论我是使用无状态会话还是有状态会话都无关紧要.由此产生的性能是不可接受的,并且远非任何期望.

我的Hibernate Konfiguration:

 <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:4040/xy?zeroDateTimeBehavior=convertToNull</property>
    <property name="hibernate.connection.username">xy</property>
    <property name="hibernate.connection.password">xy</property>
    <property name="hibernate.connection.autocommit">false</property>
    <property name="hibernate.show_sql">false</property>
    <property name="hibernate.format_sql">false</property>
    <property name="hibernate.use_sql_comments">false</property>
    <property name="hibernate.query.factory_class">org.hibernate.hql.internal.classic.ClassicQueryTranslatorFactory</property>
    <property name="hibernate.connection.provider_class">org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider</property>
    <property name="hibernate.c3p0.min_size">5</property>
    <property name="hibernate.c3p0.max_size">20</property>
    <property name="hibernate.c3p0.timeout">300</property>
    <property name="hibernate.c3p0.max_statements">250</property>
    <property name="hibernate.c3p0.idle_test_period">3000</property>
    <property name="hibernate.jdbc.batch_size">250</property>
    <property name="hibernate.connection.release_mode">auto</property>
    <property name="hibernate.order_inserts">true</property>
    <property name="hibernate.order_updates">true</property>
    <property name="hibernate.cache.use_second_level_cache">false</property>
    <property name="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</property>
    <property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
    <property name="hibernate.cache.use_query_cache">true</property>
    <property name="net.sf.ehcache.configurationResourceName">hibernate_ehcache.xml</property>

我正在使用:

<dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-c3p0</artifactId>
        <version>4.3.5.Final</version> …