Docker start rhasspy then memory binge

Physical environment: 4 core 8G, ubuntu 22.04 lts. I installed rhasspy with docker.
Before executing docker start rhasspy:

total used free shared buff/cache available
7.7Gi 2.6Gi 4.5Gi 7.0Mi 547Mi 4.8Gi

After docker start rhasspy does nothing for 10 minutes:

total used free shared buff/cache available
7.7Gi 7.3Gi 133Mi 7.0Mi 262Mi 172Mi