Dear Ceph Community, I hope this message finds you well. I am encountering an out-of-memory (OOM) issue with one of my Ceph OSDs, which is repeatedly getting killed by the OOM killer on my system. Below are the relevant details from the log: *OOM Log*: [Wed Oct 30 13:14:48 2024] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/system.slice/system-ceph\x2dosd.slice,task=ceph-osd,pid=6213,uid=64045 [Wed Oct 30 13:14:48 2024] Out of memory: Killed process 6213 (ceph-osd) total-vm:216486528kB, anon-rss:211821164kB, file-rss:0kB, shmem-rss:0kB, UID:64045 pgtables:418836kB oom_score_adj:0 [Wed Oct 30 13:14:58 2024] oom_reaper: reaped process 6213 (ceph-osd), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB *Ceph OSD Log*: 2024-10-30T13:15:30.207+0600 7f906c74dd80 0 _get_class not permitted to load lua 2024-10-30T13:15:30.211+0600 7f906c74dd80 0 <cls> /build/ceph-15.2.17/src/cls/hello/cls_hello.cc:312: loading cls_hello 2024-10-30T13:15:30.215+0600 7f906c74dd80 0 _get_class not permitted to load kvs 2024-10-30T13:15:30.219+0600 7f906c74dd80 0 _get_class not permitted to load queue 2024-10-30T13:15:30.223+0600 7f906c74dd80 0 <cls> /build/ceph-15.2.17/src/cls/cephfs/cls_cephfs.cc:198: loading cephfs 2024-10-30T13:15:30.223+0600 7f906c74dd80 0 osd.13 299547 crush map has features 432629239337189376, adjusting msgr requires for clients 2024-10-30T13:15:30.223+0600 7f906c74dd80 0 osd.13 299547 crush map has features 432629239337189376 was 8705, adjusting msgr requires for mons 2024-10-30T13:15:30.223+0600 7f906c74dd80 0 osd.13 299547 crush map has features 3314933000854323200, adjusting msgr requires for osds 2024-10-30T13:15:30.223+0600 7f906c74dd80 1 osd.13 299547 check_osdmap_features require_osd_release unknown -> octopus 2024-10-30T13:15:31.023+0600 7f906c74dd80 0 osd.13 299547 load_pgs *Environment Details*: - Ceph Version: 15.2.17 (Octopus) - OSD: osd.13 - Kernel: Linux kernel version It seems that the OSD process is consuming a substantial amount of memory (total-vm: 216486528kB, anon-rss: 211821164kB), leading to OOM kills on the node. The OSD service restarts but continues to showing consumption excessive memory and OSD get down. Could you please provide guidance or suggestions on how to mitigate this issue? Are there any known memory management settings, configuration adjustments, or OSD-specific tuning parameters that could help prevent this from recurring? Any help would be greatly appreciated. Thank you for your time and assistance! Regards Mosharaf Hossain Manager, Product Development Bangladesh Online (BOL) Level 8, SAM Tower, Plot 4, Road 22, Gulshan 1, Dhaka 1212, Bangladesh Tel: +880 9609 000 999, +880 2 58815559, Ext: 14191, Fax: +880 2 2222 95757 Cell: +880 1787 680828, Web: www.bol-online.com