Should You Replace MySQL with SQLite? Pros, Cons, and When to Use It

Introduction

When packaging a project that includes MySQL into a container, the image size can be huge and slow to pull, especially on low‑performance servers.

Considering SQLite as an alternative because of its small footprint raises the question of what compromises it makes.

First Impressions of SQLite

It behaves like a plain .txt file embedded directly in the application, unlike MySQL which runs as a separate service.

Cross‑platform support (Windows, macOS, Linux).

Lightweight – the whole library is only a few hundred kilobytes.

Backup – copying the file is enough to back up the database.

When to Use SQLite?

SQLite is suitable for rapid prototyping or MVP development where a full‑blown server is unnecessary, especially on machines with limited resources.

Typical workflow: use SQLite with a simple Express server for quick API testing, then replace it with a more robust database (e.g., MySQL or PostgreSQL) and a production‑grade framework such as NestJS.

The Cost of Light‑Weight

Not suitable for high‑concurrency write scenarios; multiple simultaneous writes can cause conflicts.

Frequent read/write operations on the file can lead to latency because there is no server layer to buffer I/O.

Only local access is possible; you cannot connect remotely the way you do with MySQL.

Conclusion

Use SQLite for prototype development or when server resources are extremely limited and high concurrency is not required. If the application needs to handle high traffic, skip SQLite and choose a dedicated database server.