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Things to Consider to Avoid Poor Performance or Wrong Results on 12.1.0.2 (Doc ID 2034610.1)

Last updated on JUNE 22, 2021

Applies to:

Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database - Personal Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Oracle Database - Standard Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Information in this document applies to any platform.

Purpose

The purpose of this Document is to publish some recommended fixes in hopes of avoiding problems associated with performance and wrong results in 12.1.0.2.


For issues on other versions, see following notes:

<Document 1320966.1> Things to Consider to Avoid Poor Performance or Wrong Results on 11.2.0.2
<Document 1392633.1> Things to Consider to Avoid Poor Performance or Wrong Results on 11.2.0.3
<Document 1645862.1> Things to Consider to Avoid Poor Performance or Wrong Results on 11.2.0.4

Best Practices

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. Additionally, if an issue does occur, it is no use collecting information about that issue after the event. For information on proactive preparations and diagnostics (such as testing and collecting baselines for comparison purposes), see the following notes:

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

<Document 1462240.1> Oracle 12cR1 Upgrade Companion

Scope

This Document concerns itself with highly desirable patches and related fixes in 12.1.0.2 that are not included in PSU updates, either because they contain optimizer layer fixes or because the PSU that will contain them has not yet been released.

 

TIP: If a patch is not available for your specific version and OS, please open a Service Request with details on the patch needed. Please include a list of patches already applied (opatch lsinventory -detail) as well as any other patches you intend to apply.

 

Details

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In this Document
Purpose
 Best Practices
 Pro-Active Problem Avoidance and Diagnostic Collection
Scope
Details
 Patches relevant for all platforms
 For no PSU and PSUs up through 161018
 For PSUs 170117 and above
 Changelog
References

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