Manage valuable resources recycle and wisely them where possible, serialization cost and minimize network overheads, and optimize all your database functions.

1. Recycle and manage your valuable sources by either pooling or caching. You should make a limited number of sources and share them from a common pool. Caching is simply another kind of pooling where instead of pooling a connection or object instance; you are pooling remote data, and providing it in memory.

2. Use effective design patterns to minimize network load, use  of  fast-lane  reader  pattern  for  database  reacts . The  service  locator  design  pattern,  which  replace  expensive  JNDI  access  with  the  help  of  caching principles.

3. Minimize serialization prices by marking references, which do not need serialization by declaring them 'transient'. Use pass-by-reference where possible as opposed to pass by number.

4. Set appropriate timeouts: for the HttpSession objects, after which the session ends, define idle timeout for stateful session beans etc.

5. Enhance the performance of database operations with the following tips:

• Database connections should be opened when not needed anymore, otherwise there will be potential source leakage problems.
• Apply least restrictive but valid operation isolation level.
• Use JDBC created statements for overall database efficiency and for batching repetitive updates and inserts.
• Where appropriate eager overhead your data to avoid frequently accessing the database every time on the network.