如果要监视的数据库系统是用于决策支持(DSS)的，查询比较长而且比较复杂，那么不要让质量控制(QC)代理运行大型的查询。

If the database system you are monitoring is for decision support (DSS), and the queries are long and complicated, don't have the quality control (QC) agent run a large query.

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例如，如果您的数据库用于事务处理和繁重的决策支持(DSS)查询，则可以确定非预定的DSS查询将牺牲您的事务性能。

For example, if your database is used for transaction processing and heavy decision-support (DSS) queries, you can be sure that a non-scheduled DSS query will trash your transaction performance.

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数据库是计算机智能决策支持系统的核心。

Database is the core of intelligent decision support system.

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