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  • 052-231(新增70题2018)

    You find today's performance of your production database to be the best ever. Therefore, you want to be notified in the future whenever the performance degrades by 10% of today's performance.

    What is the first step that you would take to ensure this?

    A. create baseline metrics for today's performance

    B. write the current database metrics to a database table and create a trigger to compare with future database statistics

    C. write the current database metrics to a flat file and create an operating script to compare with future database statistics

    D. write the current database metrics to a database table and create a procedure to compare with future database statistics

    E. write the current database metrics to a database table and submit a job using DBMS_JOB to compare with future database statistic

    Answer: A

    Baselines

    baseline contains performance data from a specific time period that is preserved for comparison with other similar workload periods when performance problems occur. The snapshots contained in a baseline are excluded from the automatic AWR purging process and are retained indefinitely.

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  • 原文地址:https://www.cnblogs.com/Babylon/p/8621846.html
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