Our log is
Apr 06 05:16:15 vps kernel: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=qemu.slice,mems_allowed=0-1,global_oom,task_memcg=/qemu.slice/108.scope,task=kvm,pid=2082695,uid=0
Apr 06 05:16:15 vps kernel: Out of memory: Killed process 2082695 (kvm) total-vm:69706600kB, anon-rss:60364772kB, file-rss:0kB, shmem-rss:4kB, UID:0 pgtables:123548kB oom_score_adj:0
Apr 06 05:16:15 vps systemd[1]: 108.scope: A process of this unit has been killed by the OOM killer.
Apr 06 05:16:18 vps kernel: oom_reaper: reaped process 2082695 (kvm), now anon-rss:0kB, file-rss:172kB, shmem-rss:4kB
Apr 06 05:16:18 vps kernel: vmbr0: port 6(tap108i0) entered disabled state
Apr 06 05:16:18 vps kernel: vmbr0: port 6(tap108i0) entered disabled state
Apr 06 05:16:18 vps pve-firewall[1369]: firewall update time (8.387 seconds)
Apr 06 05:16:18 vps systemd[1]: 108.scope: Succeeded.
Apr 06 05:16:18 vps systemd[1]: 108.scope: Consumed 5d 20h 17min 12.429s CPU time.
Apr 06 05:16:18 vps pvestatd[1368]: status update time (10.766 seconds)
Apr 06 05:16:19 vps qmeventd[4030877]: Starting cleanup for 108
Apr 06 05:16:19 vps qmeventd[4030877]: Finished cleanup for 108
Apr 06 05:17:01 vps CRON[4031303]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Apr 06 05:17:01 vps CRON[4031304]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Apr 06 05:16:15 vps kernel: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=qemu.slice,mems_allowed=0-1,global_oom,task_memcg=/qemu.slice/108.scope,task=kvm,pid=2082695,uid=0
Apr 06 05:16:15 vps kernel: Out of memory: Killed process 2082695 (kvm) total-vm:69706600kB, anon-rss:60364772kB, file-rss:0kB, shmem-rss:4kB, UID:0 pgtables:123548kB oom_score_adj:0
Apr 06 05:16:15 vps systemd[1]: 108.scope: A process of this unit has been killed by the OOM killer.
Apr 06 05:16:18 vps kernel: oom_reaper: reaped process 2082695 (kvm), now anon-rss:0kB, file-rss:172kB, shmem-rss:4kB
Apr 06 05:16:18 vps kernel: vmbr0: port 6(tap108i0) entered disabled state
Apr 06 05:16:18 vps kernel: vmbr0: port 6(tap108i0) entered disabled state
Apr 06 05:16:18 vps pve-firewall[1369]: firewall update time (8.387 seconds)
Apr 06 05:16:18 vps systemd[1]: 108.scope: Succeeded.
Apr 06 05:16:18 vps systemd[1]: 108.scope: Consumed 5d 20h 17min 12.429s CPU time.
Apr 06 05:16:18 vps pvestatd[1368]: status update time (10.766 seconds)
Apr 06 05:16:19 vps qmeventd[4030877]: Starting cleanup for 108
Apr 06 05:16:19 vps qmeventd[4030877]: Finished cleanup for 108
Apr 06 05:17:01 vps CRON[4031303]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Apr 06 05:17:01 vps CRON[4031304]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)