Issue

• Want to limit maximum memory of a user on the RHEL7 system.
• Below command does not set MemoryLimit persistently.

# systemctl set-property user-USERID.slice MemoryLimit=1G 

• Could we limit memory system-wide for all users ?
• Could we limit memory group based ?
• Below does not work:-

1- useradd test
2- Open two terminals
3- In first terminal - ssh test@
4- In second terminal - run commands
   4.1- # systemctl set-property user-USERID.slice MemoryLimit=1G
   4.2- # systemctl show user-USERID.slice|grep MemoryLimit   --- This shows expected results i.e. MemoryLimit equal to 1G.
5- After system reboot MemoryLimit reset.