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Oracle10g Grid Computing with RAC
Chapter 17 -
Oracle’s Grid Integration Technologies

Oracle Resource Manager

  • Resource Consumer Group – These are the named entities, which are groups of users or sessions combined together, based on their processing and resource needs.

  • Resource Plan - Contains the directives that specify how the resources are allocated to the resource consumer groups.

  • Resource Plan Directive – These are used to associate resource consumer groups with particular resource plans and allocate resources among the resource consumer groups.

The Oracle package dbms_resource_manager is used to create and maintain the resource plans and manage the resource consumer groups.

Resource and Plan Directives

The resource plan can be a ‘single-level resource plan’ or it can be a ‘multi-level resource plan’. In a single-level resource plan, the resources are allocated among the associated resource groups. For example, the policy_rec plan allocates CPU resources among the three consumer groups viz., claims, sales, and legal. The resource group claims gets 55% of CPU time, sales gets 25%, and legal receives 20% of CPU time.

In a multi-level resource plan, sub-plans represent a hierarchy of plans and their associated resource groups. The policy_rec provides for two sub-plans, sales and claims, and one resource group named ‘legal’. The claims sub-plan allocates 60% of CPU time to the resource group called ‘LIFE’ and 40% to the group called ‘AUTO’. The sales sub-plan allocates 70% of CPU time to the resource group called ‘NEWSALES’ and 30% to the group called ‘MARKET’.

For more information, see the book Oracle 11g Grid and Real Application Clusters 30% off if you buy it directly from Rampant TechPress . 

Written by top Oracle experts, this RAC book has a complete online code depot with ready to use RAC scripts.

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