This paper presents the design and part of implementation of a database performance monitoring and analyzing system(DMI) based on J2EE with discussing the architecture and performance optimizing of Oracle.
在讨论Oracle体系结构和性能优化的基础上介绍了一个基于J2EE的数据库性能监控和分析系统（DMI）的总体设计思想及其部分实现。
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Performance optimizing of business database is a main problem encountered by system administrator, and it will impact the running of whole database system.
大型数据库性能调优是系统管理员面临的一个主要问题，它直接影响到整个数据库系统的有效运行。
It's important when performance optimizing the system that you start from a base of data that is adequately normalized; otherwise, when you update data, you'll have to update every instance of it.
在优化系统时，应首先从以充分规范化的数据为基础入手，这一点非常重要；否则，在更新数据时，就必须更新其所有实例。
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