I used that post as a source yes, and it’s stated explicitly but it’s not the only one. One section in particular is similar since we both present the different preemption modes. However, both audiences are different. thebuild.com has an audience composed of PostgreSQL enthusiasts (if not experts) and I don’t. So a significant part of my post was about explaining things from first principles (what’s a page, a TLB, a spinlock, etc.). I explain way more “basic” things and he goes beyond me in terms of how to cope with the problem. I don’t think the posts are closed.