Neues vom PostgreSQL Planet
Andrew Farries: Introducing multi-version schema migrations
David Wheeler: RFC: PGXN Meta Spec v2
Two bits of news on the “PGXN v2” project.
Daniel Vérité: Implementing UUIDs v7 in pure SQL
Tomas Vondra: Autovacuum Tuning Basics
A few weeks ago I covered the basics of tuning checkpoints, and in that post I also mentioned autovacuum as the second common source of performance issues (based on what we see on the mailing list and at our customers). Let me follow-up on that with this post about how to tune autovacuum, to minimize the risk of performance issues. In this post I'll briefly explain why we even need autovacuum (dead rows, bloat and how autovacuum deals with it), and then move to the main focus of this blog post - tuning.
Andreas 'ads' Scherbaum: Ozgun Erdogan
Andrei Lepikhov: How expensive is it to maintain extended statistics?
In the previous post, I passionately advocated for integrating extended statistics and, moreover, creating them automatically. But what if it is too computationally demanding to keep statistics fresh?
This time, I will roll up my sleeves, get into the nitty-gritty and shed light on the burden extended statistics put on the digital shoulders of the database instance. Let's set aside the cost of using this type of statistics during planning and focus on one aspect - how much time we will spend in an ANALYZE command execution.
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