performance - Persistence.createEntityManager() painfully slow with Hibernate -


i'm having huge performance issues eclipse rcp application, apparently caused hibernate. more specific, application takes extremely long start (up 2 minutes) - profiling , debugging showed creating hibernate/jpa entitymanagerfactory (which happens @ startup) takes extremely long.

i've played around lot settings, such using file database rather in-memory , not using hbm2ddl, without success. has ever experienced problems these?

i'm using jdk 1.6.20, hibernate 3.5 , hsqldb 1.8 (in-memory configuration).

below persistence.xml:

<?xml version="1.0" encoding="utf-8"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence"     xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"     xsi:schemalocation="http://java.sun.com/xml/ns/persistence         http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"     version="2.0">     <persistence-unit name="my_db" transaction-type="resource_local">         <provider>org.hibernate.ejb.hibernatepersistence</provider>             <!-- 20 classes; skipped brevity -->         <properties>             <property name="hibernate.dialect" value="org.hibernate.dialect.hsqldialect"/>             <property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcdriver"/>             <property name="hibernate.connection.url" value="jdbc:hsqldb:mem:my_db"/>             <property name="hibernate.hbm2ddl.auto" value="create-drop"/>         </properties>     </persistence-unit>     </persistence> 

        <property name="hibernate.hbm2ddl.auto" value="create-drop"/>

depending on how many entities have, may take time create tables, indexes , alikes. i'd change db (or non in-memory db), replace create-drop "create", run once, remove property entirely (so doesn't try create existing tables) , run again. this last step closer actual time spent hibernate current configuration.


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