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limit

Using docker run:

docker run -m 512m --memory-reservation=256m nginx

Using docker compose file:

    deploy:
        resources:
            limits:
              cpus: 0.50 # WARN: this should be float!
              memory: 512M
            reservations:
              cpus: 0.25 # WARN: this should be float!
              memory: 128M

watch

docker stats