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Avoiding and Resolving Database Performance Related Issues After Upgrade (Doc ID 1528847.1)

Last updated on SEPTEMBER 25, 2018

Applies to:

Enterprise Manager for Oracle Database - Version 8.1.7.4 and later
Oracle Database - Personal Edition - Version 7.1.4.0 and later
Oracle Database - Standard Edition - Version 7.0.16.0 and later
Oracle Database - Enterprise Edition - Version 6.0.0.0 and later
Information in this document applies to any platform.

Purpose

In the vast majority of cases, an upgrade of the Oracle database will perform well 'out of the box' with little user intervention. In the unlikely event of problems, this Document provides information on how to troubleshoot issues relating to performance after an upgrade has occurred.

Pro-Active Problem Avoidance and Diagnostic Collection

Although some problems may be unforeseen, in many cases problems may be avoidable if signs are detected early enough.
For information on suggested preparations for upgrades in order to avoid issues and in case diagnostics are required, see the upgrade sections in:

<Document 1482811.1> Best Practices: Proactively Avoiding Database and Query Performance Issues
<Document 1477599.1> Best Practices Around Data Collection For Performance Issues

Troubleshooting Steps

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In this Document
Purpose
 Pro-Active Problem Avoidance and Diagnostic Collection
Troubleshooting Steps
 Upgrade Planning
 Plan Stability
 Real Application Testing (RAT)
 Patches
 Prepare to collect diagnostics
 Post-Upgrade Database Performance Troubleshooting
 Post-Upgrade SQL Performance Troubleshooting
 Communities: Database Tuning and SQL Performance
References

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