Jul 20

OCM 11g Preparation – Implement instance caging

I’ve never heard about this expression “instance caging” until I came across this topic. So, I made a quickly search in the official documentation and it was a single page to explain everything. Fast to learn. “Instance caging is a method that uses an initialization parameter to limit the number of CPUs that an instance can …

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Jul 20

OCM 11g Preparation – Use SQL Plan Management feature

SQL Plan Management is a new feature introduced with Oracle DB 11g that enables the system to automatically control SQL plan evolution by maintaining SQL plan baselines. With this enabled, a newly generated SQL plan can integrate a SQL plan baseline only if it has been proven that doing so will not result in performance regression. During …

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Jul 18

OCM 11g Preparation – Configure baseline templates

There are three types of baselines: Fixed, Moving Windows and Templates. In this chapter, we will focus in the third one, where our target is to create baselines for a contiguous time period in the future. There are two types of baseline templates: single and repeating. They are very easy to create through “DBMS_WORKLOAD_REPOSITORY.CREATE_BASELINE_TEMPLATE” procedure. In …

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Jul 16

OCM 11g Preparation – Use SQL Performance Analyzer

Performance Analyser is specially good when we are doing an Upgrade in our Oracle Version, so you can check the times of the queries before/after the change. But for OCM, only 11gR2 is required to study. So probably, we will face another type of changement, like: Parameter Change Optimizer Statistics Practice here creating a SQL Tuning …

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Jul 16

OCM 11g Preparation – Use SQL Access Advisor

As I said to the previous chapter, SQL Access Advisor is also related with the previous topic (“Use SQL tuning tools and features“), but was defined separately. This indicates that this it is also a very important and will probably be in the certification exam. Study it! SQL Advisor is another performance tool and can suggest improvements like: Indexes. …

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