2701
How PostgreSQL stores rows
poking inside postgres pages
New
The latest blog posts to take off on Hacker News. 6,947 posts.
2702
Landing a new syscall, part 1: What is futex?
A deep dive into the futex system call and how it is used to process synchronization functions.
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Raid-Z Expansion Feature for ZFS Goes Live
The Foundation sponsored feature reflows existing data to rewrite it onto a new arrangement of disks thereby freeing space at the end of the logical RAID-Z group The FreeBSD Foundation funded the project to ensure the completion and release of an easy-to-use and practical application. The project came in under budget…
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When an M1 Mac mini is faster than an M1 Pro: contention and core allocation
When running some tasks confined to E cores, the original M1 chip from 2020 completes them significantly quicker than an on an M1 Pro. Here’s the detail.
2707
On building 30k Debian packages
As part of my ongoing attempts to create some nice datasets for training large code models for C/C++ , I've recently been attempting to buil...
2708
Java BitSet performance-flicker mystery
Why does the performance of this prime sieve, using a Java BitSet, flicker between either decent performance and half of that?
2709
Jepsen: Radix DLT 1.0-Beta.35.1
Radix DLT (Distributed Ledger Technology) is a distributed ledger: a serializable log of transactions over a state machine, along with mechanisms for querying that state. Throughout this report, “Radix” refers to the Radix DLT software .
2710
Serenity OS: Interview
How would you build an operating system? My answer is I wouldn't. First off, I don't know how. And the second thing is it seems like to large of a task. It took thousands of developers to build Windows XP. But actually, it is possible to build an operating system from scratch. My guest is doing it. Andreas Kling…
2711
Go performance from version 1.2 to 1.18
Shows how much the performance of Go has improved from version 1.2 through to 1.18 -- in its compiler, runtime, and libraries.
2712
Why Not ZFS (2021)
ZFS is a hybrid filesystem and volume manager system that is quite popular recently but has some important and unexpected problems.
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How to stop running out of ephemeral ports and love long-lived connections
Often programmers have assumptions that turn out, to their surprise, to be invalid. From my experience this happens a lot. Every API, technology or system can be abused beyond its limits and break in a miserable way
2715
Failing to reach DDR4 bandwidth
Unum builds the Search, Storage, and Networking engines powering the modern data stack. Deployed on 100M+ devices, our technology serves DBMS unicorns and frontier AI labs.
2716
WebVM: Server-less x86 virtual machines in the browser
We made a server-less virtual Linux environment that runs unmodified Debian binaries in the browser. This is powered by CheerpX, a WebAssembly virtualization platform. Feel free to play with it and report bugs: https://webvm.io
2717
Installing Every Arch Package
Using algorithms and Julia to install as many packages as possible from the Arch Linux official repositories
2718
The case of the mysterious --help directory (2020)
For quite some time—as my research will show, March 2016—, I have been annoyed by a directory named --help showing up in my home directory (and sometimes in others).
2719
PostgreSQL used fsync incorrectly for 20 years (2019) [video]
About a year ago the PostgreSQL community discovered that fsync (on Linux and some BSD systems) may not work the way we always thought it is, with possibly disastrous consequences for data durability/consistency (which is something the PostgreSQL community really values).
2720
How to avoid layout shifts caused by web fonts
One of the biggest causes of layout shifts for my clients is late-loading web fonts, let's look at how to optimise them!
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Reclaiming the lost art of Linux server administration
One of the skills I wish I’d learned earlier in my career is basic Linux server administration. Specifically in relation to hosting something on the web, either a web app or API that I wrote myself, or something from the thriving self-hosted community , such as WordPress. Managing servers is increasingly seen as the…
2724
Things we finally know about network queues (2017)
How big should your queue be, and what should you do when it fills up? Many times, we implement or even deploy a networking system before w...
2725
Magic-trace: Diagnose tricky performance issues with Intel Processor Trace
Intel Processor Trace is a hardware technology that can record all program execution flow along with timing information accurate to around 30ns. As far as I ...
2726
Prime Video Uses WebAssembly
The switch to WebAssembly increases stability, speed.
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LTO Tape data storage for Linux nerds
Tape storage is surprisingly not dead! If you are here then you may be considering using LTO tape as part of your backup or your long term archiving strategy. I’m here to mostly talk you out of it, or at best make sure that you are aware of what you are walking into.
2729
Reasons Kubernetes is so complex
Preface Hello friends! It’s been a while. I’ve been finding it very hard to write while holding up a full-time job, and I’ve also been dealing with some very...
2730
A Minimum Viable Computer, or Linux for $15
Building a fully functional Linux handheld computer for under $15, featuring a custom PCB design, minimal BOM cost, and practical usability