How to Adjust Linux Out-Of-Memory Killer Settings for PostgreSQL
Logging of processes killed by OOM Killer is not consistent as to where logged on different Linux operating systems.
The following grep command will assist in finding logged entries:
# run on Debian 10.7 - illustrates logging on Debian 10 is to /var/log/kern.log sudo grep -arRnFi 'Killed process' /var/log/ /var/log/kern.log.1:51188:Dec 30 20:37:21 omk-vm8-debian10 kernel: [ 451.435966] Killed process 2586 (VBoxHeadless) total-vm:3389340kB, anon-rss:0kB, file-rss:2229280kB, shmem-rss:0kB /var/log/kern.log.1:52870:Dec 30 23:35:33 omk-vm8-debian10 kernel: [ 8935.819561] Killed process 10156 (VBoxHeadless) total-vm:3813276kB, anon-rss:0kB, file-rss:2653120kB, shmem-rss:0kB /var/log/kern.log.1:54340:Dec 31 22:30:15 omk-vm8-debian10 kernel: [81770.629634] Killed process 23906 (VBoxHeadless) total-vm:3772300kB, anon-rss:0kB, file-rss:2610232kB, shmem-rss:0kB /var/log/kern.log.1:57045:Jan 1 09:51:35 omk-vm8-debian10 kernel: [ 7685.370394] Killed process 12314 (VBoxHeadless) total-vm:4207164kB, anon-rss:0kB, file-rss:3042256kB, shmem-rss:0kB /var/log/kern.log.1:59728:Jan 1 11:36:45 omk-vm8-debian10 kernel: [ 4532.997571] Killed process 18016 (VBoxHeadless) total-vm:4563512kB, anon-rss:0kB, file-rss:3074508kB, shmem-rss:0kB # and ... sudo dmesg -T|grep -i 'Killed process' [Wed Mar 30 04:34:14 2022] Killed process 581 (mongod) total-vm:7119792kB, anon-rss:5997108kB, file-rss:0kB, shmem-rss:0kB [Mon Apr 18 21:03:58 2022] Killed process 8285 (mongod) total-vm:7890392kB, anon-rss:6233284kB, file-rss:0kB, shmem-rss:0kB [Mon Apr 18 22:42:33 2022] Killed process 1670 (mongod) total-vm:4315484kB, anon-rss:3155376kB, file-rss:0kB, shmem-rss:0kB