Offloading is the secret sauce of Exadata. It’s what makes Exadata different from every other platform that Oracle runs on. Offloading refers to the concept of moving processing from the database servers to the storage layer. It is also the key paradigm shift provided by the Exadata platform. But it’ more than just moving work in terms of CPU usage. The primary benefit of Offloading is the reduction in the volume of data that must be returned to the database server. This is one of the major bottlenecks of most large databases.
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