Antonio Monteiro (@_anmonteiro)

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Antonio Monteiro@_anmonteiro · Oct 31, 2019

I am now on Github Sponsors. If you appreciate my work and want to support the projects that I work on publicly, you can now show your generosity by supporting me directly! github.com/sponsors/anmon…

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David Gu@davidruigu · Jul 25

We hit the linux file descriptor limit in AWS RDS Postgres, turns out there’s a hard cap of 6815744. We had to get an AWS SDE to SSH into the actual VM running the RDS instance and execute some bash commands to raise the kernel-level FD limit. This is a totally undocumented…

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David Sancho@davesnx · Jul 22

New reason-react version released today (0.16.0) Support for @reactjs 19.1 (use, useActionState, useOptimistic), stable useTransition, integration with RSC, documentation updates, Melange 5.x, and more! Work by me (@davesnx) @_tatchi @_anmonteiro and @__r17x

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Antonio Monteiro@_anmonteiro · Jul 10

now at the top of the orange site 🫠

AAntonio Monteiro@_anmonteiro · Jul 9

you really only learn about stuff like this when you run it at scale

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Antonio Monteiro@_anmonteiro · Jul 9

you really only learn about stuff like this when you run it at scale

DDavid Gu@davidruigu · Jul 9

At scale, Postgres' `LISTEN/NOTIFY` adds a global mutex on `COMMIT`. We hit this at @recallai while handling tens of thousands of concurrent writers. It effectively serialized every `COMMIT`, brought the DB to a halt, and is barely documented. We only found it by digging…

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David Gu@davidruigu · Jul 9

full writeup: recall.ai/blog/postgres-…

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David Gu@davidruigu · Jul 9

At scale, Postgres' `LISTEN/NOTIFY` adds a global mutex on `COMMIT`. We hit this at @recallai while handling tens of thousands of concurrent writers. It effectively serialized every `COMMIT`, brought the DB to a halt, and is barely documented. We only found it by digging…

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FUN OCaml@FunOCaml · May 13

Great news everyone! FUN OCaml 2025 is happening in Warsaw, September 15 + 16, 2025! The CFP and registration are open 🧡🐫👇

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Antonio Monteiro@_anmonteiro · Jun 26

have you heard of curl | bash? how about LLM | ansible?

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Antonio Monteiro@_anmonteiro · Jun 17

it's only vibe coding when it doesn't work

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Antonio Monteiro@_anmonteiro · Jun 11

we're hiring strong engineers in SF to work on really impactful infra / product. we're building the infrastructure to access conversation data in real time, operating at a huge scale with a tiny engineering team. does this sound interesting? DMs open

AAntonio Monteiro@_anmonteiro · May 11

We ran 7 million EC2 instances last month. If this level of scale sounds interesting, please reach out 🙏

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David Sancho@davesnx · Jun 3

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Antonio Monteiro@_anmonteiro · May 12

I havent snooped around but this sounds very exciting. I wonder what theyre using to orchestrate this, what kind of auto scaling theyre doing, the observability on this scale must be insane. I bet the healthchecks are super tight, and the persistence layer at this scale. sheesh!!

AAntonio Monteiro@_anmonteiro · May 11

We ran 7 million EC2 instances last month. If this level of scale sounds interesting, please reach out 🙏

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Antonio Monteiro@_anmonteiro · May 11

We ran 7 million EC2 instances last month. If this level of scale sounds interesting, please reach out 🙏

AAntonio Monteiro@_anmonteiro · Apr 14

.@recallai has been growing really fast and we’re looking for engineers to help build the cloud for conversation data. We run something like ~40k CPUs at peak load and record millions of meetings every month. Check link below 👇

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Antonio Monteiro@_anmonteiro · Apr 14

.@recallai has been growing really fast and we’re looking for engineers to help build the cloud for conversation data. We run something like ~40k CPUs at peak load and record millions of meetings every month. Check link below 👇

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Krystel@krysteleal · Apr 11

My conversations lately with @_anmonteiro Me lately: 😭💃🥳😔😩🤡💃🤦‍♀️🥳

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David Sancho@davesnx · Apr 8

ahrefs frontend stack: - Melange - Reason - reason-react - react.js (react dates, recharts, etc...) - styled-ppx - server-reason-react - atd (migrating to melange-json) part-of-frontend-that's-actually-backend: - OCaml - Lwt - Routes - sqlgg - devkit (stdlib and webserver)

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