Nextcloud VPS requirements for 1, 5 and 20 users

Sizing guide

Our recommendations, derived from the sourced figures below. Not measurements.

Official requirements

What people report in practice

Individual reports, not controlled tests. Versions, hardware and settings differ, so treat these as data points, not guarantees.

• AIO on a 2 GB instance ran with RAM and swap near 100% and froze for minutes every ~30 min; better after moving to 4 GB. Maintainer's accepted answer: use at least 4 GB for AIO

  Personal use, Linode 2 GB (2022)

  Nextcloud forum Nextcloud forum: Very high memory usage on Nextcloud AIO · checked Oct 21, 2026

• Snap install idles around 1 GB on a 2 GB VM with 512 MB swap, but needed far more at peak with many concurrent users

  Same thread, reply from another admin (2022)

  Nextcloud forum Nextcloud forum: Very high memory usage on Nextcloud AIO (reply #6) · checked Oct 21, 2026

• Collabora or Elasticsearch make 2 GB too little; imaginary with lots of photos needs another 1–2 GB; 8 GB used for a home AIO with >100 GB of photos

  Same thread, reply from a forum moderator (2023)

  Nextcloud forum Nextcloud forum: Very high memory usage on Nextcloud AIO (reply #11) · checked Oct 21, 2026

• 1 GB RAM for up to 15 simultaneous users "could be tricky"; thumbnail generation is the expensive part

  Small-business photo galleries on a 1 GB VPS (2017)

  Nextcloud forum Nextcloud forum: Nextcloud and resources on a small VPS · checked Oct 21, 2026

What drives Nextcloud's RAM use

Concurrent requests, i.e. PHP-FPM workers

Each simultaneous request is served by a PHP worker using roughly 50–100 MB. Desktop and phone clients poll every 30 seconds, so several connected devices keep workers busy even when nobody is clicking. Total PHP RAM is about workers × per-worker RSS, which is why the docs give a per-process figure instead of a per-server one.

Preview (thumbnail) generation

Generating image and video previews is the most expensive routine job. A photo-heavy instance needs more RAM and CPU while the backlog is processed; the AIO maintainers recommend the Preview Generator app to pre-generate them on a schedule.

Optional containers and apps

ClamAV, Collabora/OnlyOffice, full-text search (Elasticsearch/OpenSearch), Talk Recording and imaginary each add their own memory floor. They are the difference between a 2 GB and an 8 GB Nextcloud.

The database and cache

MariaDB/Postgres plus Redis for file locking and caching. Small on a personal instance, but they grow with file count and need RAM to stay fast.

Gotchas on a VPS

• Don't leave PHP-FPM at its defaults. The stock pm.max_children = 5 caps you at five simultaneous PHP requests and causes 502/504 errors under real use. The server tuning docs give the formula: pm.max_children = available RAM for PHP ÷ average worker RSS. Setting it higher than RAM allows causes swapping, which is worse than queueing.
• SQLite is for testing. The server tuning docs recommend MariaDB/MySQL or Postgres for real use; SQLite struggles with concurrent access.
• Network storage for everything is slow. The AIO maintainers recommend SSD for everything and advise against NFS/SMB for the main data (fine for backups). A cheap VPS with a big attached volume is common; keep the database and app on the local disk.
• Cloudflare proxy/tunnel. The AIO maintainers specifically advise against Cloudflare's proxy or tunnel, saying it "potentially slows down things by a lot and introduces a lot of problems". Plan to expose it another way.
• Docker Desktop is not a server. If you test at home on Windows or macOS first, Docker Desktop's VM adds 4 GB+ of overhead (per the AIO maintainers) that a Linux VPS doesn't have. Don't size your VPS from that test.

Cheapest plans that fit

Nextcloud AIO (no heavy add-ons): 4 GB RAM or more

Threshold: AIO minimum 2 GB + recommended 1 GB headroom, plus 1 GB and 1 vCore per active user (source) plus one active user. Add 1 GB per extra active user; try the stack calculator. Also check vCPU: at least 2.

Nextcloud AIO + ClamAV / full-text search: 5 GB RAM or more

Threshold: AIO minimum 3 GB with ClamAV/Fulltextsearch + recommended 1 GB, plus 1 GB and 1 vCore per active user (source) plus one active user. Add 1 GB per extra active user; try the stack calculator. Also check vCPU: at least 2.

Prices checked Oct 21, 2026 on each provider's official pricing page. EUR prices converted at the ECB rate of Oct 20, 2026 (1 € = $1.1215) only for ranking. See all plans on the cheapest 4 GB VPS page.