'Table access full' presentation slideshows

1.22k views • 86 slides

Database Performance and Tuning for developers (RAC issues and examples)

Database Performance and Tuning for developers (RAC issues and examples). WLCG Service Reliability Workshop 26 November 2007 Miguel Anjo , CERN-Physics Databases team. Outline. Motivation Basics (what you should knew before start developing an application with Oracle backend)

654 views • 49 slides

Oracle Optimizer

Oracle Optimizer. Types of Optimizers. There are different modes for the optimizer RULE: Rule-based optimizer (RBO) Deprecated; not updated since 1994 CHOOSE: Default option. Chooses cost-based optimizer (CBO) if statistics available, rule-based optimizer otherwise.

775 views • 47 slides

Execution plans and tools

Execution plans and tools. Dawid Wojcik. Execution plans. Execution plan Text or graphical representation of steps Oracle server takes to execute specific SQL Execution plan is a tree in which every node is a DB server operation

256 views • 13 slides