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Architecture Matrix
SQLite vs PostgreSQL: Embedded vs Client-Server Database
Compare SQLite (zero-config, single-file, in-process embedded database) against PostgreSQL (heavyweight, extensible, enterprise client-server relational DBMS).
Feature & Performance Breakdown
| Feature / Metric | SQLite | PostgreSQL | Advantage |
|---|---|---|---|
| Architecture | Embedded single file, zero network latency | Client-server process model with network sockets | Tie |
| Operational Overhead | Zero configuration, serverless, instant setup | Requires dedicated service, connection pools, user auth | SQLite |
| Concurrent Write Throughput | Single-writer database lock (WAL mode) | Full MVCC with high concurrent write scaling | PostgreSQL |
| Advanced Data Types & Extensions | Minimal (TEXT, NUMERIC, INTEGER, REAL, BLOB) | Rich: JSONB, PostGIS, pgvector, full-text search | PostgreSQL |
| Resource Footprint | Under 1MB memory footprint | Requires tens to hundreds of megabytes of RAM | SQLite |
When to Choose SQLite:
- •Edge functions, mobile apps (iOS/Android), and desktop applications
- •Embedded local caching and read-heavy microservices
- •Local unit testing, development sandboxes, and staging databases
When to Choose PostgreSQL:
- •High-concurrency web applications with heavy simultaneous writes
- •Applications requiring vector embeddings (pgvector) or GIS queries (PostGIS)
- •Enterprise data warehouses and microservices requiring strict RBAC