Showing 6 articles in Databases
A practical breakdown of optimistic versioning and SELECT FOR UPDATE in NestJS and PostgreSQL, with real code and a clear recommendation for wallets, inventory, and reservations.
Safely execute PostgreSQL schema migrations in NestJS without locking production tables. Master concurrent index builds and expand-and-contract renames.
Most MongoDB aggregation slowdowns in NestJS come from stage order, not missing indexes. Here's how to fix $lookup memory spikes and force IXSCAN.
A practical breakdown of why serverless Next.js apps exhaust PostgreSQL connections, and the three fixes that actually work — singleton clients, transaction-mode pooling, and HTTP drivers.
Change Streams look production-ready in a demo and fall apart on deploy day. Here's how to persist resume tokens, batch under load, and survive replica set elections in NestJS.
How to configure HNSW indexes, tune maintenance_work_mem and shared_buffers, and add hybrid search so pgvector holds up under real RAG traffic.