OOM Killer kills Scylla / Scylla-JMX - validate whats running / memory setup

[slivne]

Please make sure that this is Advisor related.

Describe the issue logically
OOM Killer - kills Scylla / Scylla-JMX - this happens under memory pressure and is extreme case - need to validate there are no process taking a lot of memory on the system

Its also an indication that swap may not be defined as Scylla-JMX can be moved to swap

Describe the condition when the issue happens
oom-killer logs

Jan 15 03:08:35 ip-xxxxxx kernel: [  pid  ]   uid  tgid total_vm      rss pgtables_bytes swapents oom_score_adj name
Jan 15 03:08:35 ip-xxxxxx kernel: [    631]     0   631    12171      527   126976        0         -1000 systemd-udevd
Jan 15 03:08:35 ip-xxxxxx kernel: [    685]     0   685    13887      111   135168        0         -1000 auditd
Jan 15 03:08:35 ip-xxxxxx kernel: [    789]    81   789    16582      148   147456        0          -900 dbus-daemon
Jan 15 03:08:35 ip-xxxxxx kernel: [   2666]     0  2666    28236      258   262144        0         -1000 sshd
Jan 15 03:08:35 ip-xxxxxx kernel: [   2977]   996  2977 4295083049 22677315 182317056        0          -950 scylla
Jan 15 03:08:35 ip-xxxxxx kernel: [  14856]     0 14856     2173        0    61440        0             0 systemd-cgroups
Jan 15 03:08:35 ip-xxxxxx kernel: [  14857]     0 14857     2140        0    57344        0             0 systemd-cgroups
Jan 15 03:08:35 ip-xxxxxx kernel: [  14865]     0 14865       79        0    32768        0             0 systemd-cgroups
Jan 15 03:08:35 ip-xxxxxx kernel: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/,task=scylla,pid=2977,uid=996
Jan 15 03:08:35 ip-xxxxxx kernel: Out of memory: Killed process 2977 (scylla) total-vm:17180332196kB, anon-rss:90709260kB, file-rss:0kB, shmem-rss:0kB, UID:996 pgtables:178044kB oom_score_…

What the user should do when this happens
validate swap is define and there are no rogue process taking a lot of memory

Any Other info or Links.