Minor Description
There are three methods to configure the prefetchSize of a consumer,per broker,per connection and per destination.I configured the policyEntry element in activemq.xml and set durableTopicPrefetch="5".Then a durable topic Consumer connected to the broker ,but the prefetchSize instance variable of ConsumerInfo object was 100, the default value for durable topic consumer.Some messages of the topic consumer were stored in the kahaDB.