除非您不能避免在单个工作单元中处理收到的消息和数据库升级，否则因为性能的原因要考虑用局部事务处理。
Unless you cannot avoid processing the incoming messages and database update in a single unit of work, consider using local transaction for performance reasons.
因此，您数据库中的锁争用将明显降低，并且您的应用程序服务器具有更短且更分散的工作单元，这将降低CPU和JVM的内存开销。
Thus, the lock contention is significantly reduced in your database, and your application server has shorter and more discrete units of work, which reduces CPU and JVM memory overhead.
用软件实现了特征提取单元、语音训练单元和语音识别单元，并利用嵌入式数据库技术对训练时提取的数据进行有效地管理。
We usr software to realize the feature extraction unit, training unit and recognition unit . Database technology is used for managing data.
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