[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3191) QueryPlanCache cache size

[Julien Kirch (JIRA)]

QueryPlanCache cache size
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                 Key: HHH-3191
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3191
             Project: Hibernate3
          Issue Type: Improvement
          Components: query-hql
    Affects Versions: 3.2.6
         Environment: Hibernate 3.2.6, all platform
            Reporter: Julien Kirch


On a large application with many (currently 696) named queries in hbm files we have a performance issue with the QueryPlanCache cache size: 

The SoftLimitMRUCache used in the QueryPlanCache use 128 hard references, the other being soft references, and this number is hardcoded.

As we have much more querries in the application, we spend much time in recompiling the same queries when they are evicted from the cache.

As the QueryPlanCache has a SessionFactoryImplementor as parameter, adding a new parameter to define the query cache plan size would be trivial; what's your opinion about this ?

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