$ ps -ax -o %mem,cmd | grep router
0.7 /usr/bin/docker run --rm -p 123:456 --name=the_router ...
5.3 java -jar the-router-fat.jar -conf /usr/verticles/conf/config.json

$ docker stats --format "table {{.Container}}t{{.CPUPerc}}t{{.MemPerc}}"
CONTAINER           CPU %               MEM %
1218ee798de6        0.15%               4.85%