Redis
Backing async job queues (e.g., BullMQ, Celery), Caching for speed-critical operations and session management
It's a specialized, high-performance tool best added when your core database can't handle specific needs like queues or fast caches.
Caching when a single database (like PostgreSQL) is preferred to reduce complexity and operational overhead
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FIRST-HAND READS
What people reported, in their own words. Every line links to where it was said.
“Redis is crazy low hanging fruit.. even job queues that run over Redis make a bit more sense than with Postgres more often than not.”
POSITIVE · performance · Hacker News · 2026-07-06
“crazy performance degradation with redis when its memory usage exceeded a single NUMA block”
NEGATIVE · performance · Hacker News · 2026-06-29
“Redis (valkey now for me mostly) is where I go for that extra oomph if the patterns make sense”
POSITIVE · performance · Hacker News · 2026-06-25
“the more advanced data types & operations of redis are usefull, is for job queues, since you can atomically move a job from the 'queue' to the 'processing' list”
MIXED · features · Hacker News · 2026-06-23
“redis is more a arbitrary shared Python heap kinda thing with all the data structures and single thread and whatnot”
NEGATIVE · performance · Hacker News · 2026-06-23
“Redis is great for small global state that needs to be super fast.”
POSITIVE · performance · Hacker News · 2026-06-05
“I still had to spend a lot of effort maintaining PostgreSQL and Redis”
NEGATIVE · ease of use · Hacker News · 2026-05-10
“A huge thank you to the Redis community and especially antirez (Savatore Sanfilippo). I don't know if you'll see this, but you've been such an inspiration. Redis changed how the industry thinks about caching, and its elegance and simplicity have been a source of inspiration”
POSITIVE · Hacker News · 2026-02-27
“every managed Redis provider stores your data in the US, and the "EU region" options are usually afterthoughts with worse performance or limited availability”
NEGATIVE · Hacker News · 2026-02-25
“Redis caching is critical - first request is 2000ms, cached is 50ms”
POSITIVE · performance · Hacker News · 2026-02-16
“once I moved to Redis Labs a lot of good things happened, and made Redis maturing much faster: we had a core team all working at the core, I was no longer alone when there were serious bugs, improvements to make, and so forth. During those years many good things happened, including Streams, ACLs, memory reduction stuff, modules, and in general things that made Redis more solid.”
MIXED · features · Hacker News · 2026-02-13
“a __del__ in the redis client code caused almost random deadlocks at my job for several years”
NEGATIVE · reliability · Hacker News · 2025-11-12
“massively scaled Celery + RabbitMQ + Redis deployment with excellent off-the-shelf reporting”
POSITIVE · performance · Hacker News · 2025-11-03
“The Redis backend just launched and is stable for production use.”
POSITIVE · reliability · Hacker News · 2025-04-04
“I did manage to crash Redis' graph plugin pretty quickly when I was testing that”
NEGATIVE · reliability · Hacker News · 2025-02-27
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