How to Fix PostgreSQL "FATAL: Sorry, Too Many Clients Already" With Serverless Next.js
Your Next.js app deployed on a serverless platform (Vercel, AWS Lambda, Netlify Functions) works fine at first, then starts throwing connection errors under...
Category
PostgreSQL
Fixing PostgreSQL errors, performance issues and configuration quirks.
How to Fix Postgres Query Slow After Migration to AWS RDS / Aurora
A query that ran fast on your old PostgreSQL setup is noticeably slower after migrating to RDS or Aurora, even though the hardware specs look comparable or...
How to Fix Postgres pg_dump Error: Server Version Mismatch Between Local and Remote
Running pg_dump against a remote database fails with a version mismatch error, even though the connection itself succeeds. PostgreSQL's dump tools are strict...
How to Fix PostgreSQL "SSL Error: Certificate Verify Failed" on Heroku / Supabase
Connecting to a managed PostgreSQL database on Heroku or Supabase fails with a certificate verification error, even though the database is genuinely reachable...
How to Fix Postgres pgvector Index Build Timing Out on Large Embeddings Dataset
Creating a vector index on a large table of embeddings takes far longer than expected, or times out entirely before completing. Building an index over millions...
How to Fix "FATAL: password authentication failed for user" in PostgreSQL
PostgreSQL rejects your connection attempt with a password authentication error, even when you're confident the password is correct. This error means...
How to Resolve "FATAL: Remaining Connection Slots Are Reserved for Non-Replication Superuser Connections"
PostgreSQL has hit its maximum connection limit and is now refusing new connections from regular application users, reserving whatever's left specifically for...
How to Fix "PostgreSQL Column Does Not Exist" Casing/Quote Issue
A query references a column you can clearly see in your table definition, but PostgreSQL insists it doesn't exist. This is almost always a case-sensitivity...
How to Resolve "pkill / pg_terminate_backend Not Killing Database Query"
You call pg_terminate_backend() on a runaway query expecting it to stop immediately, but the process lingers, still consuming resources, sometimes for a...