Production-Grade SQLite: WAL Mode, Concurrency & High Availability

Running SQLite in Production with WAL Mode

SQLite is often mischaracterized as a lightweight "testing database". In reality, SQLite handles tens of millions of queries per day on modern hardware when configured properly.

The Secret Sauce: Write-Ahead Logging (WAL)

By default, SQLite uses a rollback journal. Switching to WAL mode enables concurrent readers while a write transaction is active!

PRAGMA journal_mode = WAL;
PRAGMA busy_timeout = 5000;
PRAGMA synchronous = NORMAL;

Benefits of Embedded SQLite

• Zero Network Latency: Database runs directly inside your Go binary's process memory space.
• Simplified Backups: Backup is as easy as copying a single .db file or using VACUUM INTO.
• Minimal Infra Cost: No separate database cluster required for small to mid-scale applications.