Bolt database

Database Query Timeout - Complex Queries Too Slow

Database queries timeout or take too long (>5 seconds). Complex queries with joins or aggregations are slow.

API endpoints that query database time out or users see loading spinners for too long.

Error Messages You Might See

Query execution timeout after 30 seconds Database connection timeout Slow query warning: exceeded 1 second Database lock timeout
Query execution timeout after 30 secondsDatabase connection timeoutSlow query warning: exceeded 1 secondDatabase lock timeout

Common Causes

  1. Missing database indexes on frequently queried columns
  2. N+1 queries - fetching parent then all children separately
  3. Fetching more data than needed (select * instead of specific columns)
  4. Complex joins without proper indexes
  5. Large result sets without pagination

How to Fix It

Add indexes: CREATE INDEX idx_user_email ON users(email)

Use eager loading: Prisma.findUnique({ include: { posts: true } }) instead of separate queries

Select specific fields: select { id: true, email: true } instead of full objects

Paginate large results: limit 100, offset (page-1)*100

Profile queries: explain analyze SELECT... in database

Cache frequently accessed data: use Redis for hot data

Real developers can help you.

Milan Surelia 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. ISHANTDEEP SINGH ISHANTDEEP SINGH Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems. BurnHavoc BurnHavoc Been around fixing other peoples code for 20 years. Rudra Bhikadiya 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. Krishna Sai Kuncha Krishna Sai Kuncha Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : ) Sage Fulcher Sage Fulcher Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them) Mehdi Ben Haddou Mehdi Ben Haddou - Founder of Chessigma (1M+ users) & many small projects - ex Founding Engineer @Uplane (YC F25) - ex Software Engineer @Amazon and @Booking.com Taufan 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. Meïr Ankri Meïr Ankri Full-stack developer specializing in React / Next.js / Node.js with 6+ years of experience. I've worked across various sectors including automotive (Reezocar/Société Générale), healthcare (Medical Link SaaS), and e-commerce (Glasman). I build web apps end-to-end, from architecture to production, with a focus on scalability, performance, and code quality. I also mentor junior developers and contribute to technical decisions and code reviews. Yovel Cohen Yovel Cohen I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well.

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Frequently Asked Questions

How do I know if a query is slow?

Run EXPLAIN ANALYZE in database. Look for sequential scans (bad) vs index scans (good)

What's N+1 query problem?

Fetch 1 user (1 query), then fetch posts for each user (N queries). Use eager loading to do 2 queries total

Should I cache everything?

No, cache hot data. Use Redis for frequently accessed, slow-to-compute results. Set reasonable TTL

Related Bolt Issues

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