The overhead of a local session EJB is relatively low, so performance should not be an issue, even if they are stateful.
本地会话ejb的开销很低，所以即使他们是有状态的，性能不是问题。
2
Session data needs to be kept, so the system cannot discard any data when running low on memory.
由于需要保留会话数据，因此系统内存不足时，无法丢弃任何数据。
3
European shares reversed early losses and Wall Street gained in another low-volume session, helped by a successful Portuguese debt offering that eased risk aversion.