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SpaceX catches the Starship to end Flight 15

https://www.spacex.com/launches/starship-flight-15
934•ls612•7h ago•638 comments

Lovable apps expose passport details and more than 200K private messages

https://www.crissyfield.de/research/lovable-en/
719•armcat•11h ago•292 comments

Show HN: Gawain – Require type hints on all Python variables

https://github.com/matheuzgomes/gawain
9•MarinhoD•31m ago•0 comments

Kiri – The Modern Container Runtime

https://runkiri.com/
9•nikolay•30m ago•2 comments

How did Woz write the Apple 1 BASIC before building the computer?

https://retrocomputing.stackexchange.com/questions/17957
152•Skyfall106•6h ago•57 comments

Osint Case Studies

https://osintsearch.org/blog/osint-case-studies
9•maiama•1h ago•0 comments

We're Asking an Appeals Court to Require a Warrant for ALPR Searches

https://www.eff.org/deeplinks/2026/11/were-asking-appeals-court-require-warrant-alpr-searches
134•nobody9999•3h ago•27 comments

A family tree of software job titles

https://zwischenzugs.com/2026/11/03/a-family-tree-of-software-job-titles/
252•umerf•11h ago•123 comments

The Evolving Story of How Chemistry Became Biology

https://www.quantamagazine.org/the-evolving-story-of-how-chemistry-became-biology-20261112/
14•pseudolus•1d ago•0 comments

Show HN: Turbo-Browser-MCP – Batch forms, DOM deltas and submit guards for MCP

https://github.com/Tthanh2k6/turbo-browser-mcp
5•tthanh2k6•1h ago•0 comments

Nvidia deliberately kept GPU prices high through circular financing deals

https://www.techspot.com/news/114558-nvidia-deliberately-kept-gpu-prices-high-through-circular.html
355•madihaa•6h ago•182 comments

KDE: The documentary [video]

https://tube.kockatoo.org/w/fFinNHfanLT7aBEb2B8y4c
420•mrkn1•15h ago•91 comments

500 Lines or Less A 3D Modeller

https://aosabook.org/en/500L/a-3d-modeller.html
30•myth_drannon•1d ago•3 comments

One Man's Quest to Create the Perfect Whiskey Glass

https://www.nytimes.com/2026/11/13/dining/drinks/kurt-josef-zalto-whiskey-glass.html
9•Kaibeezy•1d ago•1 comments

PyPI's redesigned project pages with clearer security signals are now live

https://blog.pypi.org/posts/2026-11-06-ui-updates-complete/
222•rbanffy•13h ago•97 comments

Why get an expensive Pi when I have an old phone?

https://so.long.thanks.fish/why-pi-when-i-have-an-old-phone/
529•casi•4d ago•290 comments

US loses measles-free status: Pan American Health Organization (2025)

https://www.paho.org/en/news/10-11-2025-paho-calls-regional-action-americas-lose-measles-eliminat...
54•TeaVMFan•4h ago•1 comments

Astro Spiral: Greatest Car Stunt Was Also First Computer-Modeled Stunt

https://boldentrance.com/astro-spiral-the-greatest-car-stunt/
19•CharlesW•2d ago•0 comments

Show HN: DeepSeek V3 in ~200 lines of pure Jax

https://github.com/Vaibhaav-Tiwari/deepseek-v3-jax
208•VaibhaavTiwari•14h ago•11 comments

Oxford Molecular Motors

https://www.physics.ox.ac.uk/research/group/oxford-molecular-motors/research/bacterial-flagellar-...
30•handfuloflight•3d ago•4 comments

Advancing science and engineering with Antigravity's /teamwork

https://research.google/blog/advancing-science-engineering-with-antigravitys-teamwork-feature/
183•acossta•15h ago•39 comments

The Single Router in Southern Arkansas That Ground Air Travel to a Halt

https://www.wsj.com/business/airlines/the-single-router-in-southern-arkansas-that-ground-air-trav...
38•lxm•2h ago•18 comments

'Grey Rocking': The Life-Improving Power of Being Really, Really Boring (2021)

https://www.esquire.com/uk/life/a38473153/grey-rock-technique-being-boring/
124•NaOH•2d ago•72 comments

Seagate's new hybrid drive raises some old questions

https://arstechnica.com/gadgets/2026/11/seagate-resurrects-the-ssd-hdd-hybrid-drive/
89•PaulHoule•3d ago•41 comments

Show HN: A custom font based on the Jamaican flag alphabet

https://bobbiec.github.io/jamaican-font.html
17•bobbiechen•4h ago•5 comments

Generative AI uses more energy on non-English text

https://news.umich.edu/generative-ai-uses-more-energy-on-non-english-text/
191•DeepLogin•4d ago•102 comments

Project Zero will disclose vulnerabilities 90 days after reporting

https://projectzero.google/2026/11/disclosure-policy.html
209•hacb•17h ago•65 comments

My favourite modern NES games

https://jordi.inversethought.com/blog/25-of-my-favourite-modern-nes-games/
5•jordigh•2h ago•0 comments

The Sicilian Citrus Family Tree

https://www.notesfromtheroad.com/europa/citrus-family-tree.html
49•wmchen•4d ago•18 comments

Testing a trash can Faraday cage

https://www.jefftk.com/p/testing-a-trash-can-faraday-cage
71•torutofu•2d ago•57 comments
Open in hackernews

Pglocks.org

https://pglocks.org/
80•hnasr•1y ago

Comments

whilenot-dev•1y ago
I'm a bit lost here.

Locking is a challenging problem in complex systems. Is this list to be interpreted as a "TODO: get rid of locking conflicts in future releases" or more a "NOTE: be aware there are known conflicts that will not change - find ways to work around them"?

EDIT: Also, is the creation of this list an automated or a manual effort?

tux3•1y ago
I think this is intended as educational material, not a list of things to fix.

The locks are here by necessity, it is not so easy at all to get rid of them. And even in special cases where it is possible, the complexity you have to introduce is not to be taken lightly...

If even a tenth of these disapppeared, it would be incredible, in a very surprising way.

atombender•1y ago
The creator looks like a developer and teacher, not a Postgres core team member. So I assume this is for documentation purposes.

I actually like this a lot, as there isn't a single place in the Postgres documentation that lists all the possible locks; it's spread out all over. Having a quick reference for what kinds of commands you'd be blocking with your transaction is valuable.

It's pretty evident that the pages have been programmatically generated, but I'd love know what it's generated from. I think you can derive this information from the documentation, but not sure if you can do it in an automated way without an LLM.

braiamp•1y ago
> there isn't a single place in the Postgres documentation that lists all the possible locks

Did you read this page? https://www.postgresql.org/docs/current/explicit-locking.htm...

atombender•1y ago
That's a great page, but it has several issues.

First, it isn't complete; as I said, the locking behaviour is spread out all over the Postgres documentation. For example, that page doesn't list what locks DROP INDEX takes. To find that out, you have to go to the documentation page for that command and read it carefully. In fact, really carefully — the locking behaviour is only documented under the section about CONCURRENTLY.

The page also doesn't list what possible commands are then blocked. Locks interact in subtle (and incorrectly named!) ways that are explained in the tables on that page ("Conflicting lock modes"), so to understand if something will block something else you have to look at the two commands you are curious about and then look at how their locks interact.

gulcin_xata•1y ago
I agree, it is not so straightforward to find out.
braiamp•1y ago
These are database locks, which means that depending which arrives first, the later transaction has to wait till the first one finishes to complete. These locks are about SQL commands and which commands can run concurrently with the others. There's a graph here of how that looks like https://pankrat.github.io/2015/django-migrations-without-dow...

Usually for maximum performance (minimum latency, maximum throughput) you want to have operations not lock each other, unless absolutely necessary, in which case you want them to be short.

whilenot-dev•1y ago
You make it sound like the conflict is just affecting performance and won't result in a deadlock. So it's for performance aware postgres clients/users, and not for postgres developers?
andyferris•1y ago
It is a guide for developers using postgres as a client, who need to write systems that don't deadlock, are performant and are correct. These are the (rather sharp) tools that postgres provides for doing so (or else you can use e.g. serializable isolation and optimistic concurrency, but in my experience that has too many false positives and bail out rather eagerly, whereas these tools let you be very precise and granular).
mebcitto•1y ago
Other relevant talks/blogs that I found really useful for understanding Postgres locks are:

* Unlocking the Postgres Lock Manager by Bruce Momjian: https://momjian.us/main/writings/pgsql/locking.pdf

* Anatomy of table-level locks by Gulcin Yildirim Jelinek: https://xata.io/blog/anatomy-of-locks

pasxizeis•1y ago
Shameless plug: I wrote a tool[1] that executes a given migration against a test database (e.g. in your CI) and reports back what locks it acquired.

The rationale being to have a "lock diagnostics report" commented in your PR's migration file.

It's a prototype and has a few rough edges and missing functionality, but feedback is more than welcome.

[1] https://github.com/agis/pglockanalyze

jononor•1y ago
Very practical! Locking is one of the things that can really bite when doing migrations.