Things to Consider to Avoid Poor Performance or Wrong Results on 11.2.0.2 (Doc ID 1320966.1)

Last updated on MARCH 03, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 to 11.2.0.2 [Release 11.2]
Oracle Database - Personal Edition - Version 11.2.0.2 to 11.2.0.2 [Release 11.2]
Oracle Database - Standard Edition - Version 11.2.0.2 to 11.2.0.2 [Release 11.2]
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 11.2.0.2.x.

For issues on other versions, See:

<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
<Document 2034610.1> Things to Consider to Avoid Poor Performance or Wrong Results on 12.1.0.2

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 suggested uses, other proactive preparations and diagnostics, see:

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

<Document 601807.1> Oracle 11gR1 Upgrade Companion
<Document 785351.1> Oracle 11gR2 Upgrade Companion

Scope

This Document concerns itself with highly desirable patches in 11.2.0.2 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. Most of these issues are fixed in 11.2.0.3. Please see <Document:1392633.1> for exceptions.