NNoah Bennett6h ago · 2 min readDebugging a Slow Postgres Migration: What the Query Plan Told UsWe had a migration that should have taken four minutes. It took forty. The first mistake was looking at CPU. The database was idle. The second mistake was looking at locks - plenty of them, but short.63ONPreliability-notes.hashnode.dev
Jjaberadam20014h ago · 10 min readCron Job Running Twice (or Not at All)? Fix the Job, Not the ScheduleAnswer three questions about the most important scheduled job you run: If it doesn't run tonight, who notices? If it runs twice, what happens twice? If it starts three hours late, which data moves? simplyexplained.hashnode.dev
Mmuthuselvi4h ago · 6 min readManaged Database Pricing Explained: What You Actually Pay ForPicking a managed database usually starts with a pricing page and ends with a surprise invoice. Egress fees, backup charges, SSL add-ons, and per-query billing can turn a "$20 database" into somethingantryk.hashnode.dev
DDoogal Simpson1d ago · 5 min readSQL NOT IN vs NOT EXISTS: Handling NULL Values SafelyQuick Answer: In SQL, using WHERE column NOT IN (SELECT ...) returns zero rows if the subquery contains a single NULL. This occurs because NOT IN expands to chained != operators joined by AND, and any42TYdoogal.dev
MMuhammad Ahmad23h ago · 3 min readChatGPT Serves 800 Million Users From One Postgres Primary. Here's How.800 million people use ChatGPT, and every write still lands on one PostgreSQL primary. No sharding. When I read OpenAI's post Scaling PostgreSQL to power 800 million ChatGPT users by Bohan Zhang, I co1mahmad.hashnode.dev
VVictor Horlenko18h ago · 7 min readWhen AI Agents Execute SQL: A Framework for Controlled AutonomyFor the last few years, AI help with databases has followed a comfortable routine. You describe a requirement, the model writes the SQL, you read it, fix what looks off and decide whether to run it. T1ainsights.hashnode.dev
PPipeline Whiteboard19h ago · 9 min readThe Silent CDC Bug: Data Loss With No ErrorsEvery dashboard is green. The connector says RUNNING, capture lag is under a second, and the warehouse is missing 4,812 orders. Nobody gets paged, because nothing failed. This is Part 3 of CDC in Prodpipelinewhiteboard.hashnode.dev
PPipeline Whiteboard19h ago · 10 min readDebezium Postgres to Kafka: Every Setting ExplainedAbout fifteen lines of JSON. That's all it takes to stream every insert, update and delete from Postgres into Kafka with Debezium. And two of the defaults hiding in those lines will hurt you in producpipelinewhiteboard.hashnode.dev
WWaqas Shahid22h ago · 2 min readPrisma Explained: Databases Without Writing Raw SQLIntroduction Working with a database from code usually means one of two pains: writing raw SQL strings (powerful, but no autocomplete and easy to mistype) or learning a heavy ORM with its own query lapracticaldevblog.hashnode.dev
WWaqas Shahid1d ago · 2 min readRedis Explained: The In-Memory Store That Makes Everything FasterIntroduction Redis is an in-memory data store: it keeps data in RAM instead of on disk, which makes it roughly a hundred times faster than a disk database for simple operations — but also means it is practicaldevblog.hashnode.dev
