This document provides an overview of Oracle GoldenGate and discusses performance tuning considerations. It begins with an introduction to GoldenGate's architecture and use cases. It then discusses the importance of baselining a GoldenGate implementation to understand existing performance. The document outlines how to gather baseline metrics on GoldenGate lag times, checkpoint information, and operating system CPU, memory, and disk I/O. It also provides GoldenGate tuning recommendations, such as using multiple process groups and parallel replication groups. The goal of performance tuning is to reduce lag times and optimize resource utilization.