Use the Least Expensive Transaction Attribute

Set the following transaction attributes in the EJB deployment descriptor file (ejb-jar.xml). Options are listed from best performance to worst. To improve performance, choose the least expensive attribute that will provide the functionality your application needs:

1. NEVER

2. TX_NOTSUPPORTED

3. TX_MANDATORY

4. TX_SUPPORTS

5. TX_REQUIRED

6. TX_REQUIRESNEW