That impact is due to the overhead in creating and destroying those objects by the database resource manager process.
这种影响是由数据库资源管理器进程创建和摧毁那些对象而引起的。
The Local transaction model gets its name from the fact that transactions are managed by the underlying database resource manager, not the container or framework your application is running in.
在Local Transaction模型中，事务由底层数据库资源管理程序(而非应用程序所在的容器或框架)管理，这便是它得名的原因。
In that situation, a J2EE component can use connection objects without causing overheads on the database resource manager, since a pool manager creates the connection objects up front, at startup.
在那种情况下，因为池管理器预先在启动时创建连接对象，所以，J2EE组件可以使用连接对象，而不会导致数据库资源管理器上的系统开销。
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