Database on Ricky

I Replaced Redis with PostgreSQL (And It's Faster)

Mon, 19 Jan 2026 15:45:23 +0800

I Replaced Redis with PostgreSQL (And It’s Faster)

Before the change, Redis handled three things:

Caching (70% of usage)
Pub/Sub (20% of usage)
Background Job Queue (10% of usage)

The pain points:

Two databases to backup
Redis uses RAM (expensive at scale)
Redis persistence is… complicated
Network hop between Postgres and Redis

PostgreSQL Feature

1: Caching with UNLOGGED Tables

Redis

await redis.set("session:abc123", JSON.stringify(sessionData), "EX", 3600);

PostgreSQL

CREATE UNLOGGED TABLE cache (
 key TEXT PRIMARY KEY,
 value JSONB NOT NULL,
 expires_at TIMESTAMPTZ NOT NULL
);

CREATE INDEX idx_cache_expires ON cache(expires_at);

Insert

Database Fundamentals

Mon, 01 Jan 2024 18:46:17 +0800

Database Fundamentals

Back up databases with mydumper

Wed, 01 Sep 2021 17:58:48 +0800