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The most popular blog posts about systems & performance on Hacker News. 178 posts.
In this blog post, we will explain how strict memory overcommit protects your database from catastrophic OOM (out of memory) kills. We will also share how a one character kernel bug forced us to temporarily disable this setting. Finally, we will explain our heuristic for determining the right memory overcommit limit…
Cloudflare suffered a service outage on February 20, 2026. A subset of customers who use Cloudflare’s Bring Your Own IP (BYOIP) service saw their routes to the Internet withdrawn via Border Gateway Protocol (BGP).
For Claude to learn from experience, it has to decide what’s worth remembering before it knows what’s next. Here’s how “dreaming” helps it organize memory and correct mistakes.
Forking pg_query.rs to replace Protobuf with bindgen-generated direct C-to-Rust struct mappings, yielding 5x faster query parsing and 10x faster deparsing in PgDog.
Almost every traditional database keeps its write-ahead log and data files on one machine's disk, which is the root cause of data loss risk, expensive read replicas and high-availability clones, and analytics queries that drag down transactions.
A recap of Sai Srirampur's POSETTE 2026 talk on storage performance in Postgres, with a local NVMe vs. EBS benchmark and the production setup behind it.
Since Fil-C 0.685, memory-safe inline assembly is supported on both X86_64 and ARM64.
The new processor is being developed to allow organizations to run Arm-native Linux environments simultaneously with z/OS and Linux on IBM Z, while benefiting from IBM’s established security, reliability, and scale.
At Photon, we are developing the world’s most complete iMessage API (with RCS and SMS fallback) for agents: infrastructure that lets Agents reliably communicate through one of the most native messaging interfaces people already use. While building it, we run Mac-backed systems continuously and care a lot about making…
A description of some of the recent changes to do allocations on the stack instead of the heap.
A very primitive version of recovery.
Wherein we make progress towards solving one of the most vexing problems of Computer Science — naming things.
Terrace runs sensors attackers cannot tell from real targets. We see new attack sources first, record what they do, and ship the block rules while the attack is still running.
Adventures with dry ice and RP2350 - how fast can it go?
This blog post shows how to fix a buffer overflow in the su progam of UNIX v4
We investigated a bug where CUBIC's congestion window became pinned at its minimum floor, causing a performance to plummet. The fix involved correctly measuring idle periods to distinguish RTT wait times from actual application idleness.
How bbtree, a drop-in replacement for std's BTreeMap, cuts cache misses, instructions and cache coherence traffic, and how it is kept correct.
I did this from a lawn chair on the Sunshine Coast.
The Qualys Threat Research Unit has identified a Local Privilege Escalation (LPE) vulnerability affecting default installations of Ubuntu Desktop version 24.04 and later. This flaw (CVE-2026-3888)…
Fil-C achieves memory safety even for programs that behave adversarially. That includes casting function pointers to the wrong signature and then calling them, exporting a function with one signature in one module and then importing it with a different signature in another, or even exporting a symbol as a function in…
Elasticsearch is a search engine, not a database. Here's why it falls short as a system of record.
Embark on a journey about why you should sometimes trust your OS more than yourself.
How to make 768 distinct Postgres servers look like 1 to your applications.
ReactOS is a free, opensource reimplementation of windows
The Wasm GC and exceptions proposals are both enabled by default in today’sWasmtime 47 release! We are excited to help bring more languages to WebAssemblyand everywhere that Wasmtime runs. Getting to this point involved large Wasmtimecha...
Postgres 19 brings native temporal table support. Shaun Thomas covers WITHOUT OVERLAPS, FOR PORTION OF, and temporal foreign keys - and what's still missing.
The FreeBSD Release Engineering Team is pleased to announce the availability of FreeBSD 14.4-RELEASE. This is the fifth release of the stable/14 branch.
CedarDB is a database system that delivers unmatched performance for transactions and analytics, from small writes to handling billions of rows. Built on cutting-edge research to power today’s tools and tomorrow’s challenges.
The NetBSD Project is pleased to announce NetBSD 9.5, the fifth (and final) release from the NetBSD 9 stable branch.
