Best practices to improve performance in EJB

• Overview of EJB
  
• Common tuning practices in EJBs
  
• Choosing between EJB and non-EJB
  
• Choosing between Local EJB and Remote EJB
  
• Optimize with Pass-by-Reference mechanism
  
• Wrap entity beans with session bean
  
• Reduce method calls with coarse granularity
  
• Control Serialization in Remote EJBs
  
• Cache EJBHome object references
  
• Control transaction
  
• Set optimal transaction age
  
• Use clustering for scalability
  
• Tune thread count
  
• Choosing between HttpSession and Stateful session beans
  
• Choose an EJB Server
  
• Tuning Stateless session beans
  
• Stateless session bean life cycle
  
• Tune Stateless session beans instance pool size
  
• Use setSessionContext() or ejbCreate() method as cache
  
• Release resources in ejbRemove() method
  
• Tuning Stateful session beans
  
• Stateful session bean life cycle
  
• Tune Stateful session beans instance cache size
  
• Set Optimal bean age for Stateful session beans
  
• Control serialization in Stateful session beans
  
• Remove Stateful session beans explicitly
  
• Tuning Entity Beans
  
• Entity bean life cycle
  
• Tune Entity beans instance pool size
  
• Tune Entity beans instance cache size
  
• Use setEntityContext() method as cache
  
• Release resources in unSetEntityContext() method
  
• Use lazy loading
  
• Choose optimal transaction isolation level
  
• Use proper locking strategy
  
• Make read-only Entity beans
  
• Use dirty flag to avoid unchanged buffer data updation
  
• Commit data after transaction
  
• Do bulk updates
  
• Use CMP instead of BMP
  
• Use ejbHome() methods for global operations
  
• Use connection pool
  
• Use JDBC tuning techniques
  
• Use direct JDBC when dealing with huge data
  
• Use business logic in Entity beans
  
• Tuning Message Driven Beans
  
• Message Driven Bean life cycle
  
• Tune Message Driven Beans instance pool size
  
• Use setMessageDrivenContext() or ejbCreate() method as cache
  
• Release resources in ejbRemove() method
  
• Use JMS tuning techniques
  
• Key Points