Resource limits for Docker


currently we are trying to run our acceptance tests in CircleCI. We have several docker images and a docker compose file to easily start our test environment and test against it. Locally everything works fine, but in CircleCI most of our containers are restarting continously. Looking at the logs we simply see “Killed” at the end of each log.
Are there any resource constraints we could be running in? I already limited the amount of mememory used by each container to 128MB and also limited the Java heap memory accordingly to 128MB. But nothing has changed.
Or is there anyway to see why a container has been killed in the CI environment?

Thanks in advance