PostgreSQL vs MySQL/MariaDB for a small application: a practical decision guide

For most small applications, both PostgreSQL and MySQL (or its fork MariaDB) are reliable, well-documented relational databases, and either will handle the load of a typical business app for a long time. The choice is rarely about raw speed. It is about what your software expects, a handful of feature differences that affect day-to-day work, how long each version is supported, and what your hosting offers. This guide walks through those points with references to each project's own documentation.

Start with what your software expects

If an application tells you which database to use, follow it. WordPress recommends MariaDB 10.11 or later, or MySQL 8.0 or later, and does not run on PostgreSQL out of the box. Frameworks are more flexible: Django officially supports PostgreSQL, MariaDB, MySQL, Oracle and SQLite, and Laravel's documentation lists MariaDB, MySQL, PostgreSQL, SQLite and SQL Server. With those frameworks the decision is yours, and the points below matter more.

Team experience counts too. A database your team already knows how to back up, restore and upgrade is safer than a slightly better fit nobody has operated.

Differences that show up in daily work

The first row is the one small teams feel most. With PostgreSQL, a migration that adds a column, creates an index and backfills data can be wrapped in one transaction; if any step fails, the database is left exactly as it was. With MySQL and MariaDB, each DDL statement commits on its own, so a migration that fails halfway can leave some schema changes applied and others not. Frameworks handle this, but it shapes how carefully you write and test migrations.

The JSON row matters if you store semi-structured data such as settings, form submissions or API payloads and want to query inside it efficiently. PostgreSQL's jsonb with a GIN index is a common reason teams choose it. If you only store JSON and read it back whole, any of the three is fine.

Two PostgreSQL-specific points are worth knowing as well. CREATE EXTENSION loads add-ons into a database, which is how many projects add specialised data types, indexes and functions. And PostgreSQL uses a "process per user" model in which each client connection gets its own backend process. That is a planning note rather than a weakness: because every connection is a separate process, applications that hold many idle connections, or serverless functions that open lots of short ones, usually put a connection pooler in front of PostgreSQL.

Support lifecycles and upgrades

• PostgreSQL supports each major version for five years. Major versions change the on-disk format, so moving between them needs a dump and reload or the pg_upgrade tool. PostgreSQL 16, for example, is supported until November 2028.
• MySQL now has LTS releases (8.4 is the current LTS line) and faster-moving Innovation releases. Under Oracle's Lifetime Support policy an LTS series gets five years of premier and three years of extended support.
• MariaDB announces a long-term release every year. Community LTS binaries are released for three years after general availability (five years for releases up to 11.4), with critical and security fixes in source form for two more years.

For a small app on Debian, the distribution's packaged version is often the simplest choice: Debian 13 (trixie) ships PostgreSQL 17 and MariaDB 11.8; Debian 12 (bookworm) ships PostgreSQL 15 and MariaDB 10.11. Whatever you pick, put the support end date in your calendar.

A short decision guide

• Choose MySQL or MariaDB when your application requires it (WordPress and many PHP applications), when your team already runs it well, or when you want the widest choice of shared hosting.
• Choose PostgreSQL when you want migrations that roll back cleanly, rich querying of JSON data, or extensions for specialised data, and your framework supports it.
• Either is fine for a typical CRUD application on Django, Laravel or Node.js. Pick one, learn its backup and upgrade routine, and move on.

If you host with Skyline

Skyline's web hosting plans offer PostgreSQL 16 next to MySQL/MariaDB, managed from S Panel with Adminer, with up to five PostgreSQL databases per hosting account. Hosting databases accept connections only from the same hosting server (127.0.0.1:5432), so they suit applications that run on that hosting account; for a database you need to reach from elsewhere, a self-managed VPS is the right tool.

What you should do

1. Check what your application or CMS requires before anything else.
2. If you have a free choice, decide whether transactional schema changes, JSON querying or extensions matter to you; if not, pick the database your team knows.
3. Use a supported version and note its end-of-support date.
4. Before going live, practise a backup and a restore of the chosen database, and a minor version update.

Sources

• wordpress.org/about/requirements
• docs.djangoproject.com/en/stable/ref/databases
• laravel.com/docs/12.x/database
• wiki.postgresql.org/wiki/Transactional_DDL_in_PostgreSQL:_A_Competitive_Analysis
• postgresql.org/docs/current/sql-createdatabase.html
• dev.mysql.com/doc/refman/8.4/en/implicit-commit.html
• dev.mysql.com/doc/refman/8.4/en/atomic-ddl.html
• mariadb.com/docs/server/reference/sql-statements/transactions/sql-statements-that-cause...
• postgresql.org/docs/current/datatype-json.html
• dev.mysql.com/doc/refman/8.4/en/json.html
• mariadb.com/docs/server/reference/data-types/string-data-types/json
• postgresql.org/docs/current/sql-createextension.html
• postgresql.org/docs/current/connect-estab.html
• postgresql.org/support/versioning
• dev.mysql.com/doc/refman/8.4/en/mysql-releases.html
• mariadb.org/about/#maintenance-policy
• qa.debian.org/madison.php?package=postgresql-17
• qa.debian.org/madison.php?package=mariadb
• cloud.alskyline.com/postgresql-hosting-saudi-arabia
• cloud.alskyline.com/hosting