Bolt
database
Redis Cache Returning Stale Data - Cache Not Invalidating
Users see old data from Redis cache even after updates. Cache doesn't invalidate when data changes.
Data appears correct in database but cached version is stale.
Error Messages You Might See
Cache showing old data
Update doesn't reflect in UI
Data mismatch between cache and database
Stale cache persisting
Common Causes
- Cache TTL too long - data expires slowly
- No cache invalidation on update/delete operations
- Cache key structure doesn't match query conditions
- Updating database but forgetting to delete cache
- Multiple cache keys for same data causing duplicates
How to Fix It
Invalidate cache on writes: after update, delete cache key: redis.del('user:123')
Use pattern deletion: redis.del('user:*') to clear all user cache
Set reasonable TTL: 5-60 minutes depending on data freshness needs
Implement cache versioning: 'user:v1:123' changes if schema changes
Use Redis pub/sub to invalidate cache across multiple servers
Real developers can help you.
Stanislav Prigodich
15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it.
Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
Expertise:
💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web.
🖋️ Sharing insights through technical writing, blogging, and open-source contributions.
🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences.
Notable Achievements:
🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development.
🌟 Open source contributions on Github & StackOverflow for Flutter & Dart
🎖️ Worked on improving app performance and user experience with smart solutions.
Milan is always happy to connect, work on new ideas, and explore the latest in technology.
Jared Hasson
Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever
Rudra Bhikadiya
I build and fix web apps across Next.js, Node.js, and DBs.
Comfortable jumping into messy code, broken APIs, and mysterious bugs.
If your project works in theory but not in reality, I help close that gap.
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
legrab
I'll fill this later
prajwalfullstack
Hi Im a full stack developer, a vibe coded MVP to Market ready product, I'm here to help
Bastien Labelle
Full stack dev w/ 20+ years of experience
Taufan
I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms.
Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact.
Omar Faruk
As a Product Engineer at Klasio, I contributed to end-to-end product development, focusing on scalability, performance, and user experience.
My work spanned building and refining core features, developing dynamic website templates, integrating secure and reliable payment gateways, and optimizing the overall system architecture.
I played a key role in creating a scalable and maintainable platform to support educators and learners globally.
I'm enthusiastic about embracing new challenges and making meaningful contributions.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
What's a good cache TTL?
User data: 1 hour. Product data: 24 hours. Real-time data: 5 minutes. Balance freshness and performance
Should I invalidate on every update?
Yes, delete cache key on write. Otherwise users see outdated data
How do I handle cache across multiple servers?
Use Redis pub/sub: publish invalidation message. All servers receive and delete cache