The purpose of RMAN performance tuning is to identify the bottlenecks for a given backup or restore job and use RMAN commands, initialization parameters, or adjustments to physical media to improve overall performance.
As database sizes continue to grow unabated, with tens to hundreds of terabytes prevalent in customer’s environments, server and storage systems have also dramatically increased in resource, network, and I/O capacity to support required database backup and restore windows. Against this backdrop, RMAN performance tuning becomes more important than ever.