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Bases auto-hébergées vs gérées

Quand le calcul brut bat la commodité managée - et ce qu'exige la propriété.

Résumé Exécutif et Réponse Rapide

Les bases managées revendent la commodité à un multiple du coût de calcul brut. Auto-héberger PostgreSQL ou MySQL sur un serveur bien dimensionné récupère l'essentiel de cette marge, contre une responsabilité opérationnelle.

Révisé

2026-08-22

The managed markup

A managed instance with the same vCPU and RAM as a commodity VM routinely costs 2-4x more once storage, backups, and high availability are itemized. The premium purchases automation, not hardware.

What self-hosting really requires

You own provisioning, monitoring, backup verification, failover drills, and security patching. Automated WAL archiving to object storage plus tested restores cover most small-team risk profiles.

RAM is the database spec that matters

Database performance tracks the working set held in memory. Size RAM generously before adding vCPUs; memory-optimized instances are usually the better spend.

A middle path

Many teams self-host primary databases on NVMe-backed VPS providers and keep managed services for exotic needs (global replication, serverless scaling). Compare both options against actual requirements rather than defaults.

À retenir

  • Managed databases commonly cost 2-4x equivalent raw compute.
  • Self-hosting trades money for operational responsibility.
  • Prioritize RAM and NVMe when sizing database servers.

Comparez les régions alternatives, fournisseurs, niveaux de configuration et architectures de charge de travail.