RLS-Performance
walex
| RLS-Performance | walex | |
|---|---|---|
| 1 | 17 | |
| 32 | 256 | |
| - | - | |
| 8.2 | 9.1 | |
| 11 months ago | 13 days ago | |
| PLpgSQL | Elixir | |
| - | MIT License |
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RLS-Performance
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Fly Postgres, Managed by Supabase
About the "as complex as you need": RLS can get slow very quickly for aggregate queries, and is hard to debug (since query planner doesn't work smoothly with the RLS policy calling times).
We have a dashboard that displays aggregated stats for our admin users, and we hit serious performance issues with ~600 users with our first implementation. This repo helped us: https://github.com/GaryAustin1/RLS-Performance
walex
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The Guide to PostgreSQL Data Change Tracking
The WAL CDC approach: https://github.com/cpursley/walex?tab=readme-ov-file#publica...
CREATE PUBLICATION news_item FOR TABLE news WHERE (topic IS "AAPL");
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Elixir Nitpicks
What do you mean testing with processes?
I won't suggest these are the best written tests, but I test various processes, supervisors, etc like this:
https://github.com/cpursley/walex/blob/master/test/walex/sup...
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PostgreSQL Is Enough
You don’t send the entire WAL, just what you subscribe to - and you can even filter via SQL: https://github.com/cpursley/walex?tab=readme-ov-file#publica...
- A Technical Dive into PostgreSQL's replication mechanisms
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Fly Postgres, Managed by Supabase
What we do is much if the business logic in Postgres. But then there’s all the other stuff like external integrations, etc.
We handled that by having an Even system built on the Postgres WAL that we use like a callback system.
I put together a little library in Elixir (that originally started out as forked Supabase realtime) for this:
https://github.com/cpursley/walex
Recently added the ability to configure WalEx to forward events to webhooks or EventRelay (so you don’t need to know Elixir).
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All the ways to capture changes in Postgres
If you're using Elixir, check out https://github.com/cpursley/walex
I've actually been thinking about turning this idea into a product where you can just point it at your postgres database and select the tables you want to listen to (with filters, like you describe). And have that forwarded to a webhook (with possibility of other protocols).
I'd love to hear folks thoughts on that (and if it would be something people would pay for).
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Show HN: ElectricSQL, Postgres to SQLite active-active sync for local-first apps
Neat, this is the pattern I've been thinking about for a while now. Also glad to see this is Elixir based.
I've been using https://github.com/cpursley/walex (basically a fork of cainophile via a fork for subabase) to listen to Postgres changes in Elixir.
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How to Listen to Database Changes Using Postgres Triggers in Elixir
https://github.com/cpursley/walex
Which is based on WAL logs and doesnt have the same limitations.
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PostgreSQL Logical Replication Gotchas
Great writeup, just added this to the WalEx readme:
https://github.com/cpursley/walex
(WalEx is an Elixir lib for listening to the WAL and perform callback-like actions with the data)
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We used Elixir's Observer to hunt down bottlenecks
Very cool.
I'm using Elixir to listen to change events via https://github.com/cpursley/walex (which I basically ripped off from Supabase).
What are some alternatives?
PolarDB-for-PostgreSQL - A cloud-native database based on PostgreSQL developed by Alibaba Cloud.
neon - Neon: Serverless Postgres. We separated storage and compute to offer autoscaling, branching, and bottomless storage.
realtime - Broadcast, Presence, and Postgres Changes via WebSockets
libcluster - Automatic cluster formation/healing for Elixir applications
worker - High performance Node.js/PostgreSQL job queue (also suitable for getting jobs generated by PostgreSQL triggers/functions out into a different work queue)
helm-charts - neondatabase helm charts
supavisor - A cloud-native, multi-tenant Postgres connection pooler.
sql-task-queue
sorg - A Go-based static site generator that compiles brandur.org.
zenith - The serverless open source alternative to AWS Aurora Postgres. [Moved to: https://github.com/neondatabase/neon]
Que - A Ruby job queue that uses PostgreSQL's advisory locks for speed and reliability.
connectors - Connectors for capturing data from external data sources