---
title: "Rails 8 Solid Cache: Database-Backed Cache Store"
url: https://daily.dev/posts/rails-8-solid-cache-database-backed-cache-store-6lgeokcjo
source_url: https://blog.saeloun.com/2026/05/26/rails-8-solid-cache-database-backed-caching
type: article
source: "Saeloun"
published: 2026-05-26T15:17:57.980Z
updated: 2026-05-26T15:18:22.135Z
tags: ["backend", "ruby", "rails"]
reading_time: 5
upvotes: 0
comments: 0
language: en
---

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# Rails 8 Solid Cache: Database-Backed Cache Store

**[Saeloun](https://daily.dev/sources/saeloun)** · 5 min read · 0 upvotes · 0 comments

## Summary

Rails 8 introduces Solid Cache as the default production cache store, replacing Redis/Memcached with a database-backed solution that leverages modern SSD performance. The post covers installation for new and existing apps, configuration options (max_age, max_size, compression, sharding), real-world usage patterns (fragment caching, Russian doll caching, API response caching), and key tradeoffs including FIFO vs LRU eviction, 1–5ms latency vs Redis's 0.1–0.5ms, write amplification, lack of pub/sub support, and cold-start thundering herd issues. Guidance is provided on when to use Solid Cache versus sticking with Redis, plus performance tuning tips for compression, connection pooling, and migration steps.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://blog.saeloun.com/2026/05/26/rails-8-solid-cache-database-backed-caching>

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---

Tags: [#backend](https://daily.dev/tags/backend), [#ruby](https://daily.dev/tags/ruby), [#rails](https://daily.dev/tags/rails)

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