hi,

I tried this config:

vyos@vyos:~$ show configuration commands
set interfaces ethernet eth0 address 'dhcp'
set interfaces ethernet eth0 address 'dhcpv6'
set interfaces ethernet eth0 hw-id '08:00:27:bc:40:19'
set interfaces ethernet eth0 ipv6 address autoconf
set interfaces ethernet eth1 hw-id '08:00:27:0b:d1:40'
set interfaces ethernet eth2 hw-id '08:00:27:40:63:64'
set interfaces ethernet eth3 hw-id '08:00:27:6e:10:21'
set interfaces loopback lo
set service ssh
set system config-management commit-revisions '100'
set system console device ttyS0 speed '115200'
set system host-name 'vyos'
set system login user vyos authentication encrypted-password '$6$FxKIHB4Vqj2U5u/4$xAsKwr8j1HX1fot66n1r1GuAEkyhf853tXiNPBMxns/zxGRunU//W932.KtdaxADn6NJwMLl6UIgPYVXNyx7d/'
set system login user vyos authentication plaintext-password ''
set system ntp server 0.pool.ntp.org
set system ntp server 1.pool.ntp.org
set system ntp server 2.pool.ntp.org
set system syslog global facility all level 'info'
set system syslog global facility protocols level 'debug'
set vpn sstp authentication local-users username foo password 'bar'
set vpn sstp authentication mode 'local'
set vpn sstp network-settings client-ip-settings gateway-address '192.0.2.254'
set vpn sstp network-settings client-ip-settings subnet '192.0.2.0/25'
set vpn sstp network-settings client-ipv6-pool prefix 2001:db8::/64 mask '128'
set vpn sstp network-settings name-server '10.0.0.1'
set vpn sstp network-settings name-server '10.0.0.2'
set vpn sstp ssl ca-cert-file '/config/user-data/sstp/ca.crt'
set vpn sstp ssl cert-file '/config/user-data/sstp/server.crt'
set vpn sstp ssl key-file '/config/user-data/sstp/server.key'
vyos@vyos:~$

After commit:

Jun 08 11:54:14 vyos kernel: Out of memory: Kill process 5693 (accel-pppd) score 900 or sacrifice child
Jun 08 11:54:14 vyos kernel: Killed process 5693 (accel-pppd) total-vm:1907184kB, anon-rss:1833484kB, file-rss:1656kB, shmem-rss:0kB
Jun 08 11:54:14 vyos kernel: oom_reaper: reaped process 5693 (accel-pppd), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
Jun 08 11:54:14 vyos systemd[1]: [email protected]: Main process exited, code=killed, status=9/KILL
Jun 08 11:54:14 vyos systemd[1]: [email protected]: Failed with result 'signal'.
Jun 08 11:54:15 vyos systemd[1]: [email protected]: Service RestartSec=100ms expired, scheduling restart.
Jun 08 11:54:15 vyos systemd[1]: [email protected]: Scheduled restart job, restart counter is at 30.
Jun 08 11:54:15 vyos systemd[1]: Stopped Accel-PPP - High performance VPN server application for Linux.
Jun 08 11:54:15 vyos systemd[1]: Starting Accel-PPP - High performance VPN server application for Linux...
Jun 08 11:54:15 vyos systemd[1]: [email protected]: Can't open PID file /run/accel-pppd/sstp.pid (yet?) after start: No such file or directory
Jun 08 11:54:15 vyos systemd[1]: Started Accel-PPP - High performance VPN server application for Linux.

every second. Box has 2GB RAM.