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

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PostgreSQL can replace Redis for caching, pub/sub, job queues, and sessions using UNLOGGED tables, LISTEN/NOTIFY, SKIP LOCKED, and JSONB. While PostgreSQL is 50-158% slower per operation (0.1-1ms difference), it eliminates network hops between databases, reduces infrastructure costs by ~$100/month, simplifies operations, and

#performance

#database

#postgresql

#redis

Jan 12•12m read time•From dev.to

Table of contents

The Setup: What I Was Using Redis For Why I Considered Replacing Redis PostgreSQL Feature #1: Caching with UNLOGGED Tables PostgreSQL Feature #2: Pub/Sub with LISTEN/NOTIFY PostgreSQL Feature #3: Job Queues with SKIP LOCKED PostgreSQL Feature #4: Rate Limiting PostgreSQL Feature #5: Sessions with JSONB Real-World Benchmarks When to Keep Redis Migration Strategy Code Examples: Complete Implementation Performance Tuning Tips The Results: 3 Months Later Decision Matrix Resources TL;DR