I'm using a cache for the queries:
I see the cache filling and cache hits for the entities in the MBean. I see the StandardQueryCache just filled, hit count and miss count is always 0.
I'm wondering, why the logs show an "Obtaining JDBC connection" and a "select", when I use the cache:
(LogicalConnectionImpl.java:295) - Obtaining JDBC connection
....
(SqlStatementLogger.java:104) - select resource0_.
...
Opening the JDBC connection costs a lot of time...
Here is my configuration:
Thank you!
Kai
Code:
public interface ResourceQuery extends Repository<Resource,Integer>{
@Query("SELECT r from Resource r WHERE r.resourceIdentifier.resourceServerName = :resourceServerName")
@QueryHints({ @QueryHint(name = "org.hibernate.cacheable", value ="true") })
List<Resource> getResourcesByServerCached(@Param("resourceServerName") String resourceServerName);
...I'm wondering, why the logs show an "Obtaining JDBC connection" and a "select", when I use the cache:
(LogicalConnectionImpl.java:295) - Obtaining JDBC connection
....
(SqlStatementLogger.java:104) - select resource0_.
...
Opening the JDBC connection costs a lot of time...
Here is my configuration:
Code:
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
...
<property name="jpaPropertyMap">
<util:map>
<entry key="javax.persistence.sharedCache.mode" value="DISABLE_SELECTIVE"/>
<entry key="javax.persistence.cache.retrieveMode">
<util:constant static-field="javax.persistence.CacheRetrieveMode.USE"/>
</entry>
<entry key="javax.persistence.cache.storeMode">
<util:constant static-field="javax.persistence.CacheStoreMode.REFRESH"/>
</entry>
<entry key="hibernate.cache.use_second_level_cache" value="true" />
<entry key="hibernate.cache.use_query_cache" value="true" />
<entry key="hibernate.generate_statistics" value="true"/>
<entry key="hibernate.cache.region.factory_class" value="org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory"/>
<entry key="net.sf.ehcache.configurationResourceName" value="/ehcache.xml"/>
</util:map>
</property>
...Code:
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
updateCheck="false"
monitoring="autodetect"
dynamicConfig="true">
<defaultCache
maxElementsInMemory="10000"
timeToLiveSeconds="300"
timeToIdleSeconds="120"
eternal="false"
overflowToDisk="false"
statistics="true">
</defaultCache>
<!-- HBM query cache -->
<cache name="org.hibernate.cache.internal.StandardQueryCache"
maxElementsInMemory="100"
timeToLiveSeconds="3600"
timeToIdleSeconds="3600"
eternal="false"
overflowToDisk="false"
statistics="true" logging="true">
</cache>
<cache name="org.hibernate.cache.spi.UpdateTimestampsCache"
maxElementsInMemory="5000"
eternal="true"
overflowToDisk="false"
statistics="true">
</cache>
</ehcache>Kai