ClickHouse OOM on small VPS with high traffic

resolved Plausible performance Reported 2026-02-05 Verified 2026-02-20

Plausible's ClickHouse instance runs out of memory on servers with less than 2GB RAM when processing more than 100k pageviews/month.

Error Messages

Memory limit exceededOOM killed

Resolutions (1)

medium confidence 12 verified

Limit ClickHouse memory usage in your docker-compose:

clickhouse:
  environment:
    - CLICKHOUSE_MAX_MEMORY_USAGE=1073741824
  deploy:
    resources:
      limits:
        memory: 1.5G

Minimum recommended: 2GB RAM VPS for up to 500k pageviews/month.

Verified by 12 users, resource-dependent Added 2026-02-08

Applies to: 2.1 on docker