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Zero downtime Postgres upgrades
How we upgraded from Postgres 11.9 to 15.3 with zero downtime
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 555 posts.
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Go, Containers, and the Linux Scheduler
How to make the Go runtime play nicely with the Linux Scheduler
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Jepsen: MySQL 8.0.34
MySQL needs little introduction. Over the last 28 years it has become one of the most widely deployed SQL databases. MySQL is primarily used for online transaction processing (OLTP) workloads, but is also deployed as a part of OLAP and queuing systems.
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Introduction to Immutable Linux Systems
In this article, you will learn what stands behind the label immutable when it comes to Linux systems
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Using io_uring for network I/O
Discover io_uring, an async I/O API for Linux that can potentially benefit networking, and learn how to integrate it into your applications and I/O libraries.
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FreeBSD on Firecracker
A large amount of fantastic open source software originates from “scratching an itch”. Such was the case with Firecracker . In 2014, Amazon launched AWS Lambda as a “serverless” compute platform: Users can provide a function — say, ten lines of Python code — and Lambda provides all of the infrastructure between an…
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ECC RAM on AMD Ryzen 7000 Desktop CPUs
Getting ECC memory working on desktop CPUs.
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Android and RISC-V: What you need to know to be ready
You can build, test, and run the Android support for RISC-V on your own machine.
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How does database sharding work?
Learn what database sharding is, how sharding works, and some common sharding frameworks and tools.
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Maybe people do care about performance and reliability
But they are victims of complex societal factors that are beyond their control
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Gentoo goes Binary
News and information from Gentoo Linux
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XCurl
It is often said that Imitation is the Sincerest Form of Flattery. Also, remember libcrurl? That was the name of the thing Google once planned to do: reimplement the libcurl API on top of their Chrome networking library. Flattery or not, it never went anywhere. The other day I received an email asking me about ……
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Install Windows the Arch Linux Way
Installing Windows strictly through the Command Line is an important tool to have. If windows changes the installer or out of box experience, you can bypass any changes with this guide!
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Unpacking Elixir: Concurrency
Elixir is the thing I do most of my public writing and speaking about. It is my default programming language for the last 5-6 years. It suits my brain. Performs well for the kind of work I typically do. And using it I have experienced very few drawbacks. Rather than writing yet another post trying to widely summarize…
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50 years later, is two-phase locking the best we can do?
Two phase locking (2PL) was the first of the general-purpose Concurrency Controls to be invented which provided Serializability. In fact, 2P...
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How does Linux NAT a ping?
A few months ago, I found myself wondering how a command like ping 1.1.1.1 works from within a private network. In most private networks, multiple hosts connect to the Internet through a router. For IPv4, the router performs network address translation (NAT) by rewriting the original host’s source address to the…
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The end of a myth: Distributed transactions can scale
This paper appeared in VLDB'17. The paper presents NAM-DB, a scalable distributed database system that uses RDMA (mostly 1-way RDMA) and a ...
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Raspberry Pi 5 has no hardware video encoding and only HEVC decoding
Announcing Raspberry Pi 5, coming in late October: over 2x faster than Raspberry Pi 4, featuring silicon designed in-house at Raspberry Pi.
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Writing a debugger from scratch: Breakpoints
(New to this series? Consider starting from part 1) At the end of the last post, we started to get some interesting functionality with the ability to resolve addresses to names in a module. This was the last functionality missing before we could implement breakpoints! This part adds the ability for DbgRs to set…
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Patching GCC to build Actually Portable Executables
Gautham's Blog
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Follow up to “I booted Linux 293k times”
Well that blew up. It was supposed to be just a silly off-the-cuff comment about how some bugs are very tedious to bisect. To answer a few questions people had, here’s what actually happened.…
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Nanosecond timestamp collisions are common
I was wondering: how often do nanosecond timestamps collide on modern systems? The answer is: very often, like 5% of all samples, when reading the clock on all 4 physical cores at the same time. As a result, I think it is unsafe to assume that a raw nanosecond timestamp is a unique identifier.
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Do not taunt happy fun branch predictor
I recently came up with a "clever" idea to eliminate one jump from an inner loop, and was surprised to find that it slowed things down. Allow me to explain my terrible error, so that you don't fall victim in the future.