I am working on webserver on a linux embedded board without swap memory. Sometimes my webserver crashed when there was avaliable memory.
I set those configurations to prevent this but it didn't work.
overcommit_memory=2 overcommit_ratio=400 min_free_kbytes=1000
Logs:
kworker/u2:1 invoked oom-killer: gfp_mask=0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), order=0, oom_score_adj=0
[ pid ] uid tgid total_vm rs pgtables_bytes swapents oom_score_adj name
[256776.750536] [ 141] 0 141 2973 39 14336 0 0 rngd
[256776.759213] [ 143] 0 143 9620 938 24576 0 -250 systemd-journal
[256776.768543] [ 163] 0 163 2858 128 14336 0 -1000 systemd-udevd
[256776.777677] [ 179] 992 179 6008 77 18432 0 0 systemd-timesyn
[256776.787171] [ 435] 0 435 366 18 8192 0 0 atd
[256776.795496] [ 436] 0 436 596 64 8192 0 0 crond
[256776.804098] [ 437] 999 437 841 95 10240 0 -900 dbus-daemon
[256776.813047] [ 444] 0 444 1455 112 12288 0 0 ofonod
[256776.821765] [ 454] 0 454 376 30 10240 0 0 syslogd
[256776.830476] [ 461] 998 461 684 44 12288 0 0 rpcbind
[256776.839183] [ 468] 0 468 1256 932 12288 0 0 klogd
[256776.847852] [ 469] 0 469 1299 81 12288 0 0 systemd-logind
[256776.857158] [ 470] 993 470 1342 79 14336 0 0 systemd-resolve
[256776.866536] [ 471] 996 471 947 81 12288 0 0 avahi-daemon
[256776.875745] [ 472] 997 472 613 123 12288 0 0 rpc.statd
[256776.884678] [ 477] 996 477 916 51 10240 0 0 avahi-daemon
[256776.893703] [ 478] 0 478 3231 106 16384 0 0 tcf-agent
[256776.902526] [ 482] 0 482 886 19 10240 0 0 agetty
[256776.911093] [ 488] 0 488 4208 1681 26624 0 0 mydaemon
[256776.919901] [ 490] 0 490 4834 2334 26624 0 0 python3
[256776.928492] [ 597] 0 597 14636 5348 49152 0 0 python3
[256776.937084] [ 12534] 0 12534 655 77 8192 0 0 sh
[256776.945600] [ 19169] 0 19169 16437 309 30720 0 0 core
[256776.954004] [ 19177] 0 19177 2154 142 14336 0 0 wpa_supplicant
[256776.963406] [ 19179] 994 19179 1454 102 14336 0 0 systemd-network
[256776.972869] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),task=python3,pid=597,uid=0
[256776.981576] Out of memory: Killed process 597 (python3) total-vm:58544kB, anon-rss:21392kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:49152kB oom_score_adj:0
[256777.041482] oom_reaper: reaped process 597 (python3), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
