Presentation (PDF) - MySQL

Profiling General Instance Activity§ Computing Rates of Change§ Looking at the summary data gives a great idea of overall loads§ Looking at the rates of change for certain events can give you abetter idea of utilization in certain cases§ For example, thewait/synch/cond/sql/MYSQL_RELAY_LOG::update_cond eventtracks the time spent waiting in the replication SQL thread for newevents to be written to the relay log – inversely, this is the SQL threadidle time46Copyright © 2012, Oracle and/or its affiliates. All rights reserved.