True Database Agnostic
Native, production-ready support for MongoDB, PostgreSQL, MariaDB, and SQLite via Drizzle ORM.
All four database adapters are production-ready with verified benchmark suites. Switch databases by changing one config variable — zero application code changes required.
Four Databases. One Config Variable.
Start with SQLite for edge/local dev, scale to MongoDB or PostgreSQL for production — no code changes.
MongoDB
✅ ProductionWire-level zstd/snappy compression, optimised connection pooling, flexible schemas.
PostgreSQL
✅ ProductionNative JSONB + GIN indexing. Geographic read-replica routing via x-svelty-region header.
MariaDB
✅ ProductionRelational integrity, TTL-based self-cleanup. Active driver validation eliminates false positives.
SQLite
✅ Production7 PRAGMAs (WAL, mmap=256MB, cache=64MB), cross-adapter prepared statements (0.007ms reads), LRU statement cache. Ideal for edge and local dev.
Verified Performance (Cross-Adapter Prepared Statements)
Verified by the SveltyCMS Audit 2.0 engine — Intel Ultra 9 275HX, 24 cores, Bun 1.3.11.
Cross-adapter prepared statements achieve 0.007ms raw reads, 14,000+ REST RPS. Run bun test tests/benchmarks/database-performance.test.ts to reproduce.
| Operation | Avg Latency | p95 | RPS |
|---|---|---|---|
| INSERT | 0.086 ms | 0.100 ms | 11,660 |
| FIND ONE | 0.055 ms | 0.064 ms | 18,218 |
| FIND MANY (50) | 0.104 ms | 0.116 ms | 9,617 |
| UPDATE | 0.104 ms | 0.125 ms | 9,619 |
| TX Commit | 0.040 ms | 0.060 ms | 25,312 |
Unified ACID Transaction Engine
Same API surface across all 4 adapters
Single-trip mutations eliminate redundant SELECT queries, reducing mutation latency by ~40%. Based on publicly available documentation and community reports, competitor CMS platforms may require separate round-trips for mutations or offer limited cross-DB transaction support compared to SveltyCMS's unified adapter layer.
0.040ms
TX Commit avg
0.035ms
TX Rollback avg
25,312
TX Commits / sec
Database Support: A Comparison
Multiple DB support via ORM. Based on publicly available GitHub issue discussions and community reports (as of early 2026), complex nested queries can experience response times above 1 second in certain configurations.
MongoDB + PostgreSQL only — no SQLite or MariaDB support as of June 2026. Community forum reports (as of early 2026) note load times of ~45 seconds for installations with approximately 400,000 files on certain hardware configurations.
SQL-only database support (no MongoDB). No unified transaction API across adapters.
All 4 adapters production-verified with the same benchmark suite. Start on SQLite for edge, scale to MongoDB — zero code changes, same ACID transaction API throughout.