How to understand the implementation of the plan in oracle I mean if I see two implementation plans for a single sql_id plans 2 How to determine the best execution plan? Links and answers are much appreciated. Thank you

How to understand the implementation of the plan in oracle I mean if I see two implementation plans for a single sql_id plans 2 How to determine the best execution plan? Links and answers are much appreciated. Thank you

How to understand the implementation of the plan in oracle I mean if I see two implementation plans for a single sql_id plans 2 How to determine the best execution plan? Links and answers are much appreciated. Thank you

After two execution plans that have the same sql_id, so we can see what you're talking about.

See "Oracle Explain Explain Plan optimizer" by Maria Colgan of the Oracle optimizer group

http://www.Oracle.com/technetwork/database/bi-Datawarehousing/TWP-explain-the-explain-plan-052011-393674.PDF

Examine the various aspects of a selectivity to parallel execution plan

performance and understand what information you should be brilliant

the plan can be overwhelming even for the most experienced DBA. This document

offers a detailed explanation on each of the aspects of the execution plan and a

Overview of what caused the CBO to make the decision, he did.

Tags: Database

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