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Month: July 2023

Oracle performance

How to trace SQL sessions to identify Oracle Database bottlenecks

Bulent Soylu July 21, 2023 oracleperformancetrace file

Want your database to run faster? While common tuning techniques can prove quite helpful in resolving many performance issues, they don’t show the details of all the…

View More How to trace SQL sessions to identify Oracle Database bottlenecks
Oracle

How to get access to download older Oracle versions?

Bulent Soylu July 15, 2023 oracleversion

In the Software Delivery Cloud (formerly known as eDelivery) you will find the following base releases of the Oracle database: And the other source for downloads is oracle.com.…

View More How to get access to download older Oracle versions?
Oracle performance

Oracle COMPATIBLE VS OPTIMIZER_FEATURES_ENABLE

Bulent Soylu July 13, 2023 compatibleoptimizeroptimizer_feature_enableoracle

COMPATIBLE PARAMETER Understanding the COMPATIBLE Initialization ParameterIn Oracle Database 19c, when the COMPATIBLE initialization parameter is not set in your parameter file, the COMPATIBLE parameter…

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Oracle

Why you shouldn’t set OPTIMIZER_FEATURES_ENABLE

Bulent Soylu July 13, 2023 optimizeroracle

Roy today answered an interesting question on one of our internal mailing lists. And this reminds me to pick up that piece of information as…

View More Why you shouldn’t set OPTIMIZER_FEATURES_ENABLE
Oracle performance

MEMORY_TARGET, SGA_TARGET and PGA_AGGREGATE_TARGET

Bulent Soylu July 11, 2023 memory_targetpga_aggregate_targetsga_target

The memory structures that must be managed are the system global area (SGA) and the instance program global area (instance PGA). Oracle Database supports various…

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Oracle performance

Oracle SQL profile and baselines

Bulent Soylu July 6, 2023 oraclesql baselinessql profiles

This post highlights the differences between SQL profile and baselines in Oracle® and explains how it works when tuning a query. Optimizer, profile, and baseline…

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Oracle

How to upgrade ORACLE 11G to 19C

Bulent Soylu July 2, 2023 oracleupgrade

My Environment for this practice Prerequisites: Before starting the upgrade make sure you have done the below checklist: Stop the Listener Take full database backup…

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Oracle

Upgrade Database From 11g To 12c Manually

Bulent Soylu July 2, 2023 oracleupgrade

A database can be upgraded either using DBUA or manual method. But for major production databases, it is better to do it manually, so that…

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Oracle

Step by Step Oracle Database Upgrade from 11g (11.2.0.4) to 12c (12.2.0.1) using DBUA

Bulent Soylu July 2, 2023 oracleupgrade

Here we are going to demonstrate step-by-step Oracle database upgrades from 11g (11.2.0.4) to 12c (12.2.0.1), same steps can be followed to upgrade to 12.1.0.2 as well.…

View More Step by Step Oracle Database Upgrade from 11g (11.2.0.4) to 12c (12.2.0.1) using DBUA
Oracle

How to Upgrade from 11.1.0.7 to 11.2.0.3 on Linux

Bulent Soylu July 2, 2023 oracleupgrade

Part I – Installing and patching the software Occasionally during our regular DBA tasks, we get a client request or simply notice the need and…

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