systemctl status — if you want to know memory, cpu usage.

• nano /etc/systemd/system.conf
• edit two config
  memory — DefaultMemoryAccounting = yes
  cpu — DefaultCPUAccounting = yes
• systemctl daemon-reexec
• systemctl status [service-name]

https://askubuntu.com/questions/901075/systemctl-status-not-showing-cpu-memory-usage