有一个Spring/Tomcat应用程序,我试图让ehcache作为Hibernate二级实体缓存工作。它是启用的和活动的。我可以在调试日志输出中看到有多少实体被缓存。问题是每隔几秒该高速缓存就会清空。我甚至固定了缓存(只是为了看看这是否会改变行为),现在我看到了这个:
05-08-2017 16:05:21.550 [taskExecutor-12] {env=''} WARN n.s.e.Cache: Data availability impacted:
****************************************************************************************
************************** removeAll called on a pinned cache **************************
05-08-2017 16:05:21.550 [taskExecutor-12] {env=''} WARN n.s.e.Cache: Data availability impacted:
****************************************************************************************
************************** removeAll called on a pinned cache **************************
所以我认为这就是问题所在。你知道是什么会导致removeAll被一遍又一遍地隐式调用吗?
ehcache.xml
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="ehcache.xsd"
updateCheck="true"
monitoring="autodetect"
maxBytesLocalHeap="24G"
dynamicConfig="true">
<defaultCache eternal="true" maxBytesLocalHeap="1" /> <!-- not used, but required per ehcache configuration rules -->
<!-- cache for foo -->
<cache name="foo"
maxBytesLocalHeap="8G"
eternal="false"
memoryStoreEvictionPolicy="LRU"
timeToLiveSeconds="12000"
transactionalMode="off">
<pinning store="inCache" />
<persistence strategy="none" />
</cache>
</ehcache>
persistence.xml
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
<property name="hibernate.connection.driver_class" value="org.postgresql.Driver" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.ImprovedNamingStrategy" />
<property name="hibernate.cache.provider_class" value="org.hibernate.cache.EhCacheProvider" />
<property name="hibernate.cache.use_second_level_cache" value="true" />
<property name="hibernate.cache.use_query_cache" value="false" />
<property name="hibernate.generate_statistics" value="true" />
<property name="hibernate.cache.use_structured_entries" value="true" />
<property name="hibernate.cache.region.factory_class" value="org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory" />
</properties>
这些注解位于实体模型类上:
@Cacheable
@Cache(region = "foo", usage = CacheConcurrencyStrategy.READ_WRITE)
1条答案
按热度按时间6qqygrtg1#
我弄明白了。原生SQL DELETE查询导致hibernate频繁地转储整个缓存(上面的removeAll调用)。我按照下面的建议做了,现在一切都正常了。
2nd level cache invalidation with native queries