Accessing the database using both JDBC and EJB2 CMP can cause data synchronization issues when update and query are performed together within one transaction.
When update activity is excessive, the ability of cluster replication to maintain database synchronization becomes limited if the server is not sized properly.
如果没有适当地安排服务器的大小，当更新活动比较频繁时，集群复制维护数据库同步的能力就会受到限制。
3
Use Disable Logical Model Synchronization when you want to individually update, commit or synchronize.emx and.efx file artifacts.
当您个人想要更新，指定或者同步化. emx和. efx工件时，使用Disable Logical Model Synchronization。