Top 5 Timed Events and Wait Class Categories from 10g
Oracle 10g includes many enhancements to the wait event interfaces. Among them the introduction of wait classes has made the life of the DBA a lot easier in identifying the problem. The color coding given to these wait classes helps the DBA's to identify and correlate the problem to a particular category. And also the same wait class concept has been used in AWR reports as well as in many screens of the enterprise manager for example in monitoring the TOP Activity under Performance TAB Of Enterprise Manager.
In Oracle 10g wait events are classified into categories which can help the DBA to more easily determine the likely cause of the problem. The categories are:
Administrative, Idle, Application , Network , Cluster Scheduler , Commit , System I/O , Concurrency , User I/O , Configuration , Other
DBA can identify from a distance by looking at the color of the activity in the enterprise manager.
The first diagram is the TOP Activity of Enterprise Manager showing the activity in colors and right side you can see the color coding against each category.The second diagram shows the AWR report TOP 5 Times Events and Wait Class Statistics.
Happy tuning.
