Baseline recommendation
For small Docker projects, a 2 vCPU / 4GB VPS is the practical default. It gives you enough room to run a reverse proxy, one or two application containers, and routine operational tasks without immediately fighting the box.
| VPS size | Best fit | Verdict |
|---|---|---|
| 1 vCPU / 2GB | Tests, toy projects | Cheap, but easy to outgrow |
| 2 vCPU / 4GB | Most single-host Docker deployments | Best default |
| 4 vCPU / 8GB | Multiple services, heavier stacks | Upgrade when you know why |
What containers change
Containers are not free. You still need memory for the host OS, logging, networking, and the tendency for every useful project to become two or three services over time.
Direct rule
If your stack already includes a database, a reverse proxy, and one application service, do not pretend 2GB is a comfortable long-term answer.
When to move up a plan
- You are watching swap under normal use
- Deploys are noticeably slowing the server
- You want room for backups, observability, or a queue worker
Deployment checklist
- Use Docker Compose only after you understand the container list
- Put everything behind a reverse proxy
- Persist volumes deliberately, not by accident
- Watch RAM first, CPU second
Frequently asked questions
Is 2GB RAM enough for Docker?
It can be enough for testing, but 4GB is the safer baseline for a practical small Docker deployment.
What matters most for Docker on a VPS?
Memory headroom matters most early. CPU matters too, but RAM is usually the first practical limit.
Should I choose VPS or managed hosting for Docker?
If you need Docker at all, you already need VPS-level control rather than managed WordPress hosting.
Next practical step.
Use this page as a decision shortcut, then move into the related implementation guide or checklist instead of stopping at theory.