January 2012
Intermediate to advanced
542 pages
11h 28m
English
Content preview from Oracle Database 11gR2 Performance Tuning CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Analyzing data using Automatic Workload Repository (AWR)
With Oracle Database 10g, Automatic Workload Repository (AWR) was introduced. It is a tool that extends the key concepts of Statspack.
In this recipe, we will create a manual snapshot, a baseline, and some reports.
Getting ready
To use AWR, the STATISTICS_LEVEL parameter of the init.ora file must be set to the value TYPICAL or ALL.
Note
With the default setting TYPICAL, all the statistics needed for self-management functionalities are collected, providing best overall performance. Using the parameter ALL the database will collect all the statistics included in the TYPICAL settings, as well as timed operating system statistics and row source execution statistics.
We can change the parameter online ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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