Databases Reference
In-Depth Information
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Starting with
Performance Tuning
Performance tuning is a complex process, which requires a deep knowledge of both
physical and logical database structures. In this chapter, we will introduce the process
and methodology to adopt in performance tuning an Oracle Database, covering the
following recipes:
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Reviewing the performance tuning process
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Exploring the example database
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Acquiring data using a data dictionary and dynamic performance views
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Analyzing data using Statspack report
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Diagnosing performance issues using the alert log
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Analyzing data using Automatic Workload Repository (AWR)
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Analyzing data using Automatic Database Diagnostic Monitor (ADDM)
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A working example
Introduction
There are a wide range of issues that could lead to poor performance. Performance of
our Oracle database problems could be related to different areas of the system:
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Application design
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Application code
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Memory
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I/O
