FAQ: Database Upgrade Using Real Application Testing
(Doc ID 1600574.1)
Last updated on JULY 22, 2024
Applies to:
Oracle Database - Enterprise Edition - Version 10.1.0.2 and laterOracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
Purpose
This document addresses a number of Frequently Asked Questions related to Database Upgrades using Real Application Testing.
These Questions and Answers were generated from the Q&A Session for the "Foolproof Your Database Upgrade using Real Application Testing" Webcast. The recording for this webcast can be accessed in the following document:
<Document 740966.1> Oracle Support Advisor Webcasts: Current Schedule and Archived Recordings
You can discuss this article as well as addressing any further questions in the Database Performance Community in this thread.
Questions and Answers
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In this Document
| Purpose |
| Questions and Answers |
| General Questions about SQL Performance Analyzer (SPA) and Database Replay (DB Replay) |
| What is the difference between SPA and DB replay? |
| When using both SPA and DB Replay together, what is the recommended order in which to use them ? |
| Can SPA/DB Replay be used when migrating from non-RAC to RAC or vice versa? |
| Should a Test Database be an exact replica of the Production? |
| SQL Performance Analyzer (SPA) |
| How can I use SPA to deal with SQL that is already slow? |
| Does SPA make any changes to the database? For example, my STS may contain inserts and updates. Do these change the data? |
| Can you suggest a good article for SPA implementation? |
| Database Workload Capture and Replay |
| Does the database need to be restarted before a workload capture tables place? |
| How can I estimate the likely disk space requirements for capture? |
| What overhead is likely from using workload capture? |
| Can I capture workload from 2 different databases and replay it together? |
| When Replay is taking place, are client connections replicated the same as they were applied in real time? |
| How many clients are required for the replay? |
| Can I use fewer clients than what the Workload Replay Calibrate function suggests? |
| Can I use Database Replay with a Data Guard ? |
| Can Database Replay test impact of middle tier changes? |
| Can I Replay on an application server rather than a database server ? |
| Can I Replay on a different platform to the capture platform ? |
| Do the database initialisation parameters of the source and target database need to be the same for Database Replay? |
| How do I make a second replay consistent with the first if the database has moved forward in time? |
| If my test system is not as powerful as my production system, how can I compare executions? |
| Can I generate a SQL profile based upon the replay on the Test Database? |
| Can you test character set changes with DB replay? |
| How can I perform load testing using Database Replay? |
| Real Application Testing (RAT) Licensing |
| Is SPA/DB Replay/RAT part of the Enterprise Edition License? |
| Enterprise Manager Support for RAT |
| Are RAT features available in OEM 11g and 12c Cloud Control? |
| The RAT Run AWR Compare Period Report button is not currently available in EM 12c, however this is available in 11g. Will this functionality be available in 12c? |
| Performance |
| Does capturing a workload affect the Performance of the database as a whole? Is it ok to do this at peak times on a production database. ? |
| References |