自托管 vs 托管数据库
裸算力何时胜过托管便利，拥有权究竟意味着什么成本。
摘要与快速解答
托管数据库服务以数倍于裸算力的价格出售便利。在规格合适的云服务器上自托管 PostgreSQL 或 MySQL 可以收回大部分差价，代价是承担运维责任。
审阅于
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.
核心结论
- Managed databases commonly cost 2-4x equivalent raw compute.
- Self-hosting trades money for operational responsibility.
- Prioritize RAM and NVMe when sizing database servers.
浏览相关云定价指南
对比不同地域、云厂商、硬件规格及工作负载架构。