Sun Java System Application Server Enterprise Edition 8.1 2005Q2 Performance Tuning Guide

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