How do I enable WAL in Expo SQLite for React Native?

Startup: db.execSync('PRAGMA journal_mode = WAL;'); Add busy_timeout=2000 and synchronous=NORMAL. One-time init.

What is SQLite WAL and why for offline apps?

Write-ahead logging decouples reads from writes. No blocking in concurrent mobile chaos. Essential for UI + background work.

Does batching writes fix all SQLite locks in React Native?

Pairs with WAL for 95% wins. One transaction per UI burst. Timings drop, retries vanish.

🗄️ Databases & Backend

SQLite WAL: The Dirty Secret Fixing React Native's Offline Lockups

React Native devs chase snappy offline apps, only to slam into SQLite's 'database is locked' wall. WAL mode — plus smart batching — obliterates it. Here's the no-BS fix.

theAIcatchup Apr 08, 2026 4 min read

React Native Expo app code enabling SQLite WAL mode for offline concurrency

⚡ Key Takeaways

Enable WAL mode on SQLite startup in Expo to crush 'database locked' errors. 𝕏
Batch writes in transactions — fewer fsyncs, snappier UI. 𝕏
Add busy_timeout and measure: real timings prove it works. 𝕏

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theAIcatchup

Ship faster. Build smarter.

#React Native #SQLite WAL #database locks #expo-sqlite #offline-first

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