Cgroups - kernel control group: ssh task

 How to use set-property or cgroups. 

Cgroups - kernel control group:

we can set memory High on sshd: 

 

How to use:

systemctl set-property sshd.service MemoryHigh=2G

server:~ # systemctl restart sshd
server:~ # systemctl status sshd
● sshd.service - OpenSSH Daemon
     Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: disabled)
    Drop-In: /etc/systemd/system.control/sshd.service.d
             └─50-MemoryHigh.conf
     Active: active (running) since Mon 2023-10-02 07:39:29 CEST; 2s ago
    Process: 1995 ExecStartPre=/usr/sbin/sshd-gen-keys-start (code=exited, status=0/SUCCESS)
    Process: 1997 ExecStartPre=/usr/sbin/sshd -t $SSHD_OPTS (code=exited, status=0/SUCCESS)
   Main PID: 1998 (sshd)
      Tasks: 1
     CGroup: /system.slice/sshd.service
             └─ 1998 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups"


please check this file:

server~ # cat /etc/systemd/system.control/sshd.service.d/50-MemoryHigh.conf
# This is a drop-in unit file extension, created via "systemctl set-property"
# or an equivalent operation. Do not edit.
[Service]
MemoryHigh=2147483648