# ps aux --sort -rss  | head -10
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root     25561 10.0 72.2 2192512 1239308 ?     Ssl  Sep23 575:31 /usr/lib/juju/mongo3.2/bin/mongod --dbpath /var/lib/juju/db --sslOnNormalPorts --sslPEMKeyFile /var/lib/juju/server.pem --sslPEMKeyPassword=xxxxxxx --port 37017 --syslog --journal --replSet juju --quiet --oplogSize 1024 --ipv6 --auth --keyFile /var/lib/juju/shared-secret --storageEngine wiredTiger
root      3880 53.9  8.6 1183848 147652 ?      Sl   Sep22 3895:50 /var/lib/juju/tools/machine-0/jujud machine --data-dir /var/lib/juju --machine-id 0 --debug
root      1283  0.1  1.2 222680 21908 ?        Ssl  Sep22   7:57 /usr/bin/python3 /usr/sbin/waagent -daemon
root       482  0.0  0.5  38196  8724 ?        Rs   Sep22   0:38 /lib/systemd/systemd-journald
root      4033  0.0  0.2 499196  4896 ?        Ssl  Sep22   0:19 /usr/bin/lxd --group lxd --logfile=/var/log/lxd/lxd.log
root       871  0.0  0.2 334092  4296 ?        Ssl  Sep22   0:14 /usr/lib/snapd/snapd
root      1443  0.0  0.2   5724  3516 ?        S<Ls Sep22   0:36 /sbin/iscsid
ubuntu   22756  0.0  0.1  12928  3356 pts/0    Ss   14:45   0:00 -bash
root     22860  0.0  0.1  12840  3056 pts/0    S    14:55   0:00 -su