Although different access paths for the same SQL statement produce the same result set, they most likely do not perform the task with the same level of performance.

虽然相同sql语句的不同访问路径会产生相同的结果集，但是它们很有可能不会通过同样的性能级别来执行任务。

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The experiment found that though there was no difference in performance - the tasks were very easy - the level of activity in the subjects' brains differed, suggesting different levels of effort.

这项实验发现，尽管表现没有区别——任务相当简单——被研究对象脑部的活动级别不同，显示了努力程度不同。

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Similarly, in DB2 z/OS, there are different types of traces that will run at sub-system level to collect information that you normally require for monitoring and performance tuning.

类似地，在 DB2 z/OS 中，会在子系统级运行不同类型的跟踪，以收集监控和性能调优通常所需的信息。

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