Update hibernate

[ceefour]

No description provided.

[sakella1986]

I have an existing JBPM project and JPA persistence is enabled. I would like to disable the JBPM persitence functionality.
I tried removing all the tables from Persitence.xml file and it is not working.

org.jbpm.services.task.audit.impl.model.AuditTaskImpl
org.jbpm.services.task.audit.impl.model.BAMTaskSummaryImpl
org.jbpm.services.task.audit.impl.model.TaskEventImpl
org.drools.persistence.info.SessionInfo
org.jbpm.persistence.processinstance.ProcessInstanceInfo
org.drools.persistence.info.WorkItemInfo
org.jbpm.persistence.correlation.CorrelationKeyInfo
org.jbpm.persistence.correlation.CorrelationPropertyInfo
org.jbpm.runtime.manager.impl.jpa.ContextMappingInfo

org.jbpm.services.task.impl.model.AttachmentImpl
org.jbpm.services.task.impl.model.BooleanExpressionImpl
org.jbpm.services.task.impl.model.CommentImpl
org.jbpm.services.task.impl.model.CompletionBehaviorImpl
org.jbpm.services.task.impl.model.ContentDataImpl
org.jbpm.services.task.impl.model.ContentImpl

org.jbpm.services.task.impl.model.DeadlineImpl
org.jbpm.services.task.impl.model.DeadlinesImpl
org.jbpm.services.task.impl.model.DelegationImpl
org.jbpm.services.task.impl.model.EmailNotificationHeaderImpl
org.jbpm.services.task.impl.model.EmailNotificationImpl
org.jbpm.services.task.impl.model.EscalationImpl
org.jbpm.services.task.impl.model.FaultDataImpl
org.jbpm.services.task.impl.model.GroupImpl
org.jbpm.services.task.impl.model.I18NTextImpl
org.jbpm.services.task.impl.model.LanguageImpl
org.jbpm.services.task.impl.model.NotificationImpl
org.jbpm.services.task.impl.model.OrganizationalEntityImpl
org.jbpm.services.task.impl.model.PeopleAssignmentsImpl
org.jbpm.services.task.impl.model.PresentationElement
org.jbpm.services.task.impl.model.ReassignmentImpl
org.jbpm.services.task.impl.model.TaskDataImpl
org.jbpm.services.task.impl.model.TaskDefImpl
org.jbpm.services.task.impl.model.TaskImpl
org.jbpm.services.task.impl.model.UserImpl
Could someone provide steps to disable JPA persistence so that I dont need to use any of the tables and improve performance. Rightnow we are using HSQL in-memory database for JBPM with hibernate and JAVA EE CDI framework.

I would like to use PostgresSQL for this. What is the recommended database for JBPM?