原题

Choose the best answer. You are having performance issues with MySQL instances. Those servers are monitored with MySQL Enterprise Monitor. Using Query Analyzer, where do you begin to look for problem queries? A) Sort the "Exec" column and check for SQL queries with low Query Response Time index (QRTi) values. B) Look for queries with low total latency times in the Latency section in the times series graph. C) Sort the "Exec" column and check for SQL queries with high Query Response Time index (QRTi) values. D) Look for queries with big prolonged spikes in row activity/access graph in the times series graph.

解析

 

Answser：A https://dev.mysql.com/doc/mysql-monitor/8.0/en/mem-features-qrti.html