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。
That impact is due to the overhead in creating and destroying those objects by the database resource manager process.
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。
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.
可以在数据库项目资源管理器窗口中看到新项目，如图5所示。
The new project can be seen in the database project explorer window, shown in Figure 5.
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