Your first decision is what sort of databasesupport you want.
您的第一个决定就是希望提供哪种类型的数据库支持。
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If the database system you are monitoring is for decisionsupport (DSS), and the queries are long and complicated, don't have the quality control (QC) agent run a large query.
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.