The cost of a long-running update transaction that eventually failed in Postgres (or any other database for that matter.
In Postgres, any DML transaction touching a row creates a new version of that row. if the row is referenced in indexes, those need to be updated with the new tuple id as well. There are exceptions with optimization such as heap only tuples ... Show More
Nov 2025
CPU and Kernel Page Faults
<p>Page faults occurs when the process tries to access a memory that isn’t backed by a physical page kernel raises a fault which loads a page. It happens on first access, stack expansion, COW, swap and much more. However it comes with a cost. </p><p><br /></p><p>In this episode o ... Show More
48m 37s
Feb 2024
Episode 507: Stephen Margheim on SQLite in Ruby on Rails Applications
If you start a new Rails project today, you’re probably going to pick Postgres for your database. And if you have a ten year old Rails app, you might be using MySQL. But Rails ships with support for SQLite, a lightweight SQL database. Can that lightweight database be used to make ... Show More
31m 21s
Sep 2023
Episode 486: High Performance PostgreSQL for Rails with Andrew Atkinson
If you love taking about databases, this is the episode for you. Ahead of the launch of his new book, High Performance PostgreSQL for Rails, Andrew Atkinson joined the show with special guest co-host, Pat Bair, to talk about why he wrote a book, why he focused on PostgreSQL and h ... Show More
31m 29s
Feb 2022
Column by your name: The analytics database that skips the rows
<p>These days, every company looking at analyzing their data for insights has a data pipeline setup. Many companies have a fast production database, often a NoSQL or key-value store, that goes through a data pipeline.The pipeline process performs some sort of extract-transform-lo ... Show More
24m 33s
Jun 2021
Accelerating ML Training And Delivery With In-Database Machine Learning
<div class="wp-block-jetpack-markdown"><h2>Summary</h2>
<p>When you build a machine learning model, the first step is always to load your data. Typically this means downloading files from object storage, or querying a database. To speed up the process, why not build the model in ... Show More
1h 5m
