Understand operating system resource considerations
理解操作系统资源方面的考虑
Note that without resource considerations, the length of time through the critical path is nine days (longest time through the various sequential steps).
注意到如果不考虑资源，通过关键路径的时间是9天(通过各种各样顺序排列的步骤所需的最长时间)。
The fact that you have resource managers that manage your connection pools does not guarantee optimum performance from the EJB layer — there are some design considerations as well!
尽管有了管理连接池的资源管理器，但是还不能保证ejb层具有最优性能——还有一些设计考虑事项！
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