By using these features, it can greatly reduce investigation time when dealing with a poor-performing query.
利用这些特性，即可显著缩短处理一个性能较差的查询时的分析时间。
2
Consider an example where a DBA knows the problem is a poor-performing query, but that query was generated by a framework, using an object-relational mapping technology.
A poor-performing Dynamic Web service can cause a domino effect, bringing the performance of other Web services, internally and externally, down to an unacceptable level.