Migrating from PostgreSQL/MySQL to SQLite: When and How to Make the Switch

SQLite has become a more viable production alternative to PostgreSQL and MySQL as modern SSDs, write-ahead logging, improved tuning practices, and platforms such as Turso reduce historical performance and operational limitations. It can be especially advantageous for read-heavy or moderate-write applications, local or multi-region read access, lightweight per-tenant databases, and teams seeking lower costs and less infrastructure complexity. Migration involves exporting schemas and data, converting incompatible SQL features and types, importing a WAL-configured SQLite file into Turso, and thoroughly testing query plans, load behavior, and concurrent write patterns. In exchange for simpler operations, lower hosting costs, file-based backups, and local synchronization capabilities, organizations may give up PostgreSQL’s stronger complex-join optimization, stored procedures, richer triggers, specialized types, extensions such as PostGIS, and built-in replication. The recommended approach is to begin with a non-critical workload and evaluate whether the application’s feature requirements, write concurrency, data size, and team expertise make SQLite an appropriate fit.

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