This document summarizes the results of tuning a PostgreSQL database using the tool pgtune. It shows the performance improvements achieved by configuring various PostgreSQL configuration options like shared_buffers and work_mem as recommended by pgtune. It also discusses the effects of changing the effective_cache_size parameter and physical disk layout optimizations on an older system with multiple disk arrays. Overall, pgtune helped improve performance by 7% and separating data files from logs saw further gains.