PostgreSQL and NUMA, part 1 of 4 This series covers the specifics of running PostgreSQL on large systems with many processors. My experience is that people spend months often learning the basics when confronted with the problem. This series tries to dispel these difficulties by providing a clear background into the topics in question. The hope is that future generations of database engineers and administrators don’t have to spend months figuring things out through trial and error. This entry in the series focuses on the low-level hows and whys of Non-Uniform Memory Access so that it is possible to understand the solutions and recommendations later with a focus on conceptual details. Unfortunately in many details this requires focusing on technical details as often the concepts without the details are confusing at best. Further entries will build upon the information in this post. We recommend reading it first, and then referring back as needed.