Using SQLite in Production: Optimizing WAL Mode and Concurrency

SQLite has traditionally been viewed as an embedded database for mobile and IoT applications. However, with modern hardware architecture, running SQLite directly within the application process eliminates network latency, enabling sub-millisecond query execution. This necessitates a new approach to database concurrency, particularly through Write-Ahead Logging (WAL) mode, which allows concurrent reads and writes without blocking. Implementing these optimizations in production environments is crucial for enhancing database performance.