Klaus Aschenbrenner

PostgreSQL MVCC is often criticized for storing old versions in place. But the question is: does it have to traverse a chain of versions to find the correct row? A new blog post to answer that: dev.to/franckpachot...

I've burned down a huge amount of my weekly available tokens across multiple LLMs, but I have now for my own x64 OS a working Rust-based Intel NIC driver - for the Intel 82577LM (8086:10ea) and Intel I219-V (8086:15b8) #osdev #rust #rustlang

Why do Java developer wear glasses? Because they don't C# ;-)

My x84 OS implements now a fully working RTL8139 network driver. It can ping IP addresses on the internet, and also answers ping requests. #osdev #rust #rustlang

Some big news: @ducklabs.com is joining AWS, with the move expected to complete by early September. Our team will stay together in Amsterdam, with more resources to take DuckDB, DuckLake and Quack further - while the open-source Duck Stack remains free under MIT license ducklabs.com/news/2026/08...

Some weekend thoughts on how LLMs change the way we start new projects. lucumr.pocoo.org/2026/8/22/fa...

Fighted against a SPID of -3. Won with 1:0 :-)

Working with multiple sub-agents across multiple GitHub issues in parallel - works like a charm :-)

I tried to adapt the transcript of my video "Being Linus Torvalds" into an english language blog post here: antirez.com/news/171

What actually happens inside an LLM after you press enter? Our blog post maps out the mechanical journey of a prompt through the forward pass. 👉 www.exoscale.com/blog/llm-fro... . . . #AI #LLM #inference

Linus Torvalds, my man! *finger gun emoji*

Can PostgreSQL perform multi-block reads to reduce system calls? Yes, it's coming in PG19 with IO combine prefetching. What about TOASTed documents? Here's a new blog post: dev.to/franckpachot...

I have now a full-blown working UEFI boot path in my OS - incl. a simple AHCI driver to access the SATA based SSD drive with its FAT32 ESP partition. 100% pure Rust code (not a single asm file!), without any dependencies to other crates! #rust #rustlang #x64 #computerscience

How to escape the heat wave? Starting a 100K “red eye” bike ride at 05:00am in the morning… 😴😴😴

Running my own OS in Proxmox - booted via UEFI :-)

I can boot now my x64 kernel on native UEFI hardware - like my AMD Ryzen system with 128 GB RAM. It uses the provided GOP framebuffer to draw a pseudo console to the screen. The legacy BIOS boot path (on older hardware) supports now also the VBE-based graphics mode for the console. #osdev #rust

My prediction: when you don't incorporate AI into your daily workflow, you will not be needed anymore in the software industry within the next 12 - 24 month.

It's the 1st time in my life that I've implemented my own UEFI loader - entirely in Rust - without any external dependencies. #Rust #rustlang #computerscience

Finished the first bicycle race of my life: the „Dolomitenradrundfahrt“ in East-Tyrol. 110km with 1700m ascent! 🥵 4:19h, and the 96th place (out of 153 participants) within my age group! 💪

What could go wrong, if you have to safeguard a new LLM (Claude Fable 5) for cybersecurity, biology and chemistry related prompts... www.anthropic.com/news/claude-...

What a day: finished my 1st Aqua Bike competition. 53th out-of-water (the last one!), and finished after the bike split at the 26th place - in 3:48h! 💪

What a day! mMy longest bike ride of my life! 😎 #mallorca

This is one of the most balanced critiques of AI I've read so far. "Reviewing AI output all day without the dopamine of creation is not a sustainable job description." tomwojcik.com/posts/2026-0...

Max Schrems ist ein Jurist, der mit seinem Einsatz für Datenschutz- und Grundrechte international höchst erfolgreich war. Peter Steinberger reitet eine Bubble, die uns derzeit alle mit einem ganzen Bündel gefährlicher Probleme konfrontiert. Österreichische Medienpolitik so:

We released DuckDB v1.5! This release comes with a “friendly CLI” client, a new (opt-in) PEG parser, support for VARIANT types and many lakehouse features. It also ships a new network stack, a reworked geospatial extension, Azure writes and an ODBC scanner. Read more at duckdb.org/2026/03/09/a...

[VLDB '25] MD-MVCC: Multi-version Concurrency Control for Schema Changes in Azure SQL Database www.vldb.org/pvldb/v... A great discussion of the end-to-end impact of allowing multiple versions of schema metadata information to be live concurrently, in a real, production system.

New blog post: "GNU and the AI reimplementations" antirez.com/news/162

It's so "funny" when #ChatGPT hallucinates about SQL Server 2025 feature internals, which are not documented anywhere. And then it says "sorry", because it delivered garbage to you... #StrangeNewWorld

CoPilot in SSMS reads from my database/sql server instance, but doesn't show me any executed queries. This is *so* dangerous for your production data - CoPilot could just pass some of your sensitive data to the LLM provider... #ai #llm #datasecurity #gdpr

[Blog] Don’t Miss Out – SQL Server 2025 Unleashed Training Starts Next Monday! www.sqlpassion.at/archive/2026... #sqlserver #performance #ai #vector #hadr

The new Ballmer Curve: tomwojcik.com/posts/2026-0...

When my MacBook Air M3 24 GB outperforms my AMD Ryzen system (128 GB RAM) with a RTX 3080Ti GPU for local LLM inference. The Unified Memory architecture rocks! 💪

Anthropic has style and responsibility! 👍

Most programmers are taught that L1 is the “top level” cache on x86.
 It’s not quite true anymore! 
Intel calls it the Decoded Stream Buffer (DSB), AMD the OpCache. Only enough room for ~4,000 micro-ops, but there are interesting ways to take advantage of it.

I have never thought that software engineers will be substituted by endless loops... #AgenticAI

"new consulting pipeline almost shut off starting in December" -> same here! 😪

AI destroys now almost every company on earth: IBM stock Drops 13.5% After Anthropic COBOL Warning: www.filmogaz.com/165789

WTF! 🫣

[Blog] PostgreSQL Quickie #2: Installation in Virtual Machines: www.sqlpassion.at/archive/2026... #PostgreSQL #postgres #quickie #youtube

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