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Troubleshooting: Avoiding and Resolving Application Performance Related Issues After Upgrade (Doc ID 1962424.1)

Last updated on JUNE 21, 2021

Applies to:

Enterprise Manager for Oracle Database - Version and later
Oracle Database - Standard Edition - Version and later
Oracle Database - Enterprise Edition - Version and later
Oracle Database - Personal Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Information in this document applies to any platform.


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 application 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
 Pro-Active Problem Avoidance and Diagnostic Collection
Troubleshooting Steps
 Application Issues
 Problem Diagnosis

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