[PVE-User] A less aggressive OOM?
Victor Rodriguez
vrodriguez at soltecsis.com
Thu Jul 10 10:56:43 CEST 2025
Hi,
Checked the OOM log and for me the conclusion is clear (disclaimer,
numbers might not be exact):
- You had around 26.7G used mem by processes + 2.3G for shared memory:
active_anon:17033436kB
inactive_anon:10633368kB
shmem:2325708kB
mapped:2285988kB
unevictable:158204kB
- Seems like you are also using ZFS (some zd* disks appear in the log)
and given that you were doing backups at the time of the OOM, I will
suppose that that your ARC size is set to 50% of the hosts memory (check
with arc_summary), so another 32G of used memory. ARC is reclaimable by
the host, but usually ZFS does not return that memory fast enough,
specially during heavy use of the ARC (i.e. reading for a backup), so
can't really count on that memory.
- Memory was quite framented and only small pages were available:
Node 0 Normal:
16080*4kB
36886*8kB
22890*16kB
4687*32kB
159*64kB
10*128kB
0*256kB
0*512kB
0*1024kB
0*2048kB
0*4096kB
Conclusions:
You had 32+26.7+2.3 ≃ 61G of used memory, with the ~3G available being
small blocks that can't be used for the typically large allocations that
VMs do. You host had no choice but to trigger OOM.
What I would do:
- Lower ARC size [1]
- Add some swap (never place it in a ZFS disk!). Even some ZRAM could help.
- Lower your VMs memory, either the total, either the minimum memory
(balloon) or both. Check that VirtIO drivers + balloon driver is
installed and working so the host can reclaim memory from the guests.
- Get more ram :)
Regards
[1]
https://pve.proxmox.com/wiki/ZFS_on_Linux#sysadmin_zfs_limit_memory_usage
On 7/8/25 18:31, Marco Gaiarin wrote:
> Mandi! Victor Rodriguez
> In chel di` si favelave...
>
>> I would start by analyzing the memory status at the time of the OOM. There
>> should be a some lines in journal/syslog were the kernel writes what the
>> memory looked like and you can figure out why it had to kill a process.
> This is the full OOM log:
>
> Jul 4 20:00:12 pppve1 kernel: [3375931.660119] kvm invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=0
> Jul 4 20:00:12 pppve1 kernel: [3375931.669158] CPU: 1 PID: 4088 Comm: kvm Tainted: P O 6.8.12-10-pve #1
> Jul 4 20:00:12 pppve1 kernel: [3375931.677778] Hardware name: Dell Inc. PowerEdge T440/021KCD, BIOS 2.24.0 04/02/2025
> Jul 4 20:00:12 pppve1 kernel: [3375931.686211] Call Trace:
> Jul 4 20:00:12 pppve1 kernel: [3375931.689504] <TASK>
> Jul 4 20:00:12 pppve1 kernel: [3375931.692428] dump_stack_lvl+0x76/0xa0
> Jul 4 20:00:12 pppve1 kernel: [3375931.696915] dump_stack+0x10/0x20
> Jul 4 20:00:12 pppve1 kernel: [3375931.701057] dump_header+0x47/0x1f0
> Jul 4 20:00:12 pppve1 kernel: [3375931.705358] oom_kill_process+0x110/0x240
> Jul 4 20:00:12 pppve1 kernel: [3375931.710169] out_of_memory+0x26e/0x560
> Jul 4 20:00:12 pppve1 kernel: [3375931.714707] __alloc_pages+0x10ce/0x1320
> Jul 4 20:00:12 pppve1 kernel: [3375931.719422] alloc_pages_mpol+0x91/0x1f0
> Jul 4 20:00:12 pppve1 kernel: [3375931.724136] alloc_pages+0x54/0xb0
> Jul 4 20:00:12 pppve1 kernel: [3375931.728320] __get_free_pages+0x11/0x50
> Jul 4 20:00:12 pppve1 kernel: [3375931.732938] __pollwait+0x9e/0xe0
> Jul 4 20:00:12 pppve1 kernel: [3375931.737015] eventfd_poll+0x2c/0x70
> Jul 4 20:00:12 pppve1 kernel: [3375931.741261] do_sys_poll+0x2f4/0x610
> Jul 4 20:00:12 pppve1 kernel: [3375931.745587] ? __pfx___pollwait+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.750332] ? __pfx_pollwake+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.754900] ? __pfx_pollwake+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.759463] ? __pfx_pollwake+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.764011] ? __pfx_pollwake+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.768617] ? __pfx_pollwake+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.773165] ? __pfx_pollwake+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.777688] ? __pfx_pollwake+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.782156] ? __pfx_pollwake+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.786622] ? __pfx_pollwake+0x10/0x10
> Jul 4 20:00:12 pppve1 kernel: [3375931.791111] __x64_sys_ppoll+0xde/0x170
> Jul 4 20:00:12 pppve1 kernel: [3375931.795656] x64_sys_call+0x1818/0x2480
> Jul 4 20:00:12 pppve1 kernel: [3375931.800193] do_syscall_64+0x81/0x170
> Jul 4 20:00:12 pppve1 kernel: [3375931.804485] ? __x64_sys_ppoll+0xf2/0x170
> Jul 4 20:00:12 pppve1 kernel: [3375931.809100] ? syscall_exit_to_user_mode+0x86/0x260
> Jul 4 20:00:12 pppve1 kernel: [3375931.814566] ? do_syscall_64+0x8d/0x170
> Jul 4 20:00:12 pppve1 kernel: [3375931.818979] ? syscall_exit_to_user_mode+0x86/0x260
> Jul 4 20:00:12 pppve1 kernel: [3375931.824425] ? do_syscall_64+0x8d/0x170
> Jul 4 20:00:12 pppve1 kernel: [3375931.828825] ? clear_bhb_loop+0x15/0x70
> Jul 4 20:00:12 pppve1 kernel: [3375931.833211] ? clear_bhb_loop+0x15/0x70
> Jul 4 20:00:12 pppve1 kernel: [3375931.837579] ? clear_bhb_loop+0x15/0x70
> Jul 4 20:00:12 pppve1 kernel: [3375931.841928] entry_SYSCALL_64_after_hwframe+0x78/0x80
> Jul 4 20:00:12 pppve1 kernel: [3375931.847482] RIP: 0033:0x765bb1ce8316
> Jul 4 20:00:12 pppve1 kernel: [3375931.851577] Code: 7c 24 08 e8 2c 95 f8 ff 4c 8b 54 24 18 48 8b 74 24 10 41 b8 08 00 00 00 41 89 c1 48 8b 7c 24 08 4c 89 e2 b8 0f 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 32 44 89 cf 89 44 24 08 e8 76 95 f8 ff 8b 44
> Jul 4 20:00:12 pppve1 kernel: [3375931.871194] RSP: 002b:00007fff2d39ea20 EFLAGS: 00000293 ORIG_RAX: 000000000000010f
> Jul 4 20:00:12 pppve1 kernel: [3375931.879298] RAX: ffffffffffffffda RBX: 00006045d3e68470 RCX: 0000765bb1ce8316
> Jul 4 20:00:12 pppve1 kernel: [3375931.886963] RDX: 00007fff2d39ea40 RSI: 0000000000000010 RDI: 00006045d4de5f20
> Jul 4 20:00:12 pppve1 kernel: [3375931.894630] RBP: 00007fff2d39eaac R08: 0000000000000008 R09: 0000000000000000
> Jul 4 20:00:12 pppve1 kernel: [3375931.902299] R10: 0000000000000000 R11: 0000000000000293 R12: 00007fff2d39ea40
> Jul 4 20:00:12 pppve1 kernel: [3375931.909951] R13: 00006045d3e68470 R14: 00006045b014d570 R15: 00007fff2d39eab0
> Jul 4 20:00:12 pppve1 kernel: [3375931.917656] </TASK>
> Jul 4 20:00:12 pppve1 kernel: [3375931.920515] Mem-Info:
> Jul 4 20:00:12 pppve1 kernel: [3375931.923465] active_anon:4467063 inactive_anon:2449638 isolated_anon:0
> Jul 4 20:00:12 pppve1 kernel: [3375931.923465] active_file:611 inactive_file:303 isolated_file:0
> Jul 4 20:00:12 pppve1 kernel: [3375931.923465] unevictable:39551 dirty:83 writeback:237
> Jul 4 20:00:12 pppve1 kernel: [3375931.923465] slab_reclaimable:434580 slab_unreclaimable:1792355
> Jul 4 20:00:12 pppve1 kernel: [3375931.923465] mapped:571491 shmem:581427 pagetables:26365
> Jul 4 20:00:12 pppve1 kernel: [3375931.923465] sec_pagetables:11751 bounce:0
> Jul 4 20:00:12 pppve1 kernel: [3375931.923465] kernel_misc_reclaimable:0
> Jul 4 20:00:12 pppve1 kernel: [3375931.923465] free:234516 free_pcp:5874 free_cma:0
> Jul 4 20:00:12 pppve1 kernel: [3375931.969518] Node 0 active_anon:17033436kB inactive_anon:10633368kB active_file:64kB inactive_file:3196kB unevictable:158204kB isolated(anon):0kB isolated(file):0kB mapped:2285988kB dirty:356kB writeback:948kB shmem:2325708kB shmem_thp:0kB shmem_pmdmapped:0kB anon_thp:866304kB writeback_tmp:0kB kernel_stack:11520kB pagetables:105460kB sec_pagetables:47004kB all_unreclaimable? no
> Jul 4 20:00:12 pppve1 kernel: [3375932.004977] Node 0 DMA free:11264kB boost:0kB min:12kB low:24kB high:36kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15996kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.032646] lowmem_reserve[]: 0 1527 63844 63844 63844
> Jul 4 20:00:12 pppve1 kernel: [3375932.038675] Node 0 DMA32 free:252428kB boost:0kB min:1616kB low:3176kB high:4736kB reserved_highatomic:2048KB active_anon:310080kB inactive_anon:986436kB active_file:216kB inactive_file:0kB unevictable:0kB writepending:0kB present:1690624kB managed:1623508kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.069110] lowmem_reserve[]: 0 0 62317 62317 62317
> Jul 4 20:00:12 pppve1 kernel: [3375932.074979] Node 0 Normal free:814396kB boost:290356kB min:356304kB low:420116kB high:483928kB reserved_highatomic:346112KB active_anon:11258684kB inactive_anon:15111580kB active_file:0kB inactive_file:2316kB unevictable:158204kB writepending:1304kB present:65011712kB managed:63820796kB mlocked:155132kB bounce:0kB free_pcp:12728kB local_pcp:0kB free_cma:0kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.109188] lowmem_reserve[]: 0 0 0 0 0
> Jul 4 20:00:12 pppve1 kernel: [3375932.114119] Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB (U) 1*2048kB (M) 2*4096kB (M) = 11264kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.127796] Node 0 DMA32: 5689*4kB (UMH) 1658*8kB (UMH) 381*16kB (UM) 114*32kB (UME) 97*64kB (UME) 123*128kB (UMEH) 87*256kB (MEH) 96*512kB (UMEH) 58*1024kB (UME) 5*2048kB (UME) 11*4096kB (ME) = 253828kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.148050] Node 0 Normal: 16080*4kB (UMEH) 36886*8kB (UMEH) 22890*16kB (UMEH) 4687*32kB (MEH) 159*64kB (UMEH) 10*128kB (UE) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 887088kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.165899] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.175876] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.185569] 586677 total pagecache pages
> Jul 4 20:00:12 pppve1 kernel: [3375932.190737] 0 pages in swap cache
> Jul 4 20:00:12 pppve1 kernel: [3375932.195285] Free swap = 0kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.199404] Total swap = 0kB
> Jul 4 20:00:12 pppve1 kernel: [3375932.203513] 16679583 pages RAM
> Jul 4 20:00:12 pppve1 kernel: [3375932.207787] 0 pages HighMem/MovableOnly
> Jul 4 20:00:12 pppve1 kernel: [3375932.212819] 314667 pages reserved
> Jul 4 20:00:12 pppve1 kernel: [3375932.217321] 0 pages hwpoisoned
> Jul 4 20:00:12 pppve1 kernel: [3375932.221525] Tasks state (memory values in pages):
> Jul 4 20:00:12 pppve1 kernel: [3375932.227400] [ pid ] uid tgid total_vm rss rss_anon rss_file rss_shmem pgtables_bytes swapents oom_score_adj name
> Jul 4 20:00:12 pppve1 kernel: [3375932.239680] [ 1959] 106 1959 1971 544 96 448 0 61440 0 0 rpcbind
> Jul 4 20:00:12 pppve1 kernel: [3375932.251672] [ 1982] 104 1982 2350 672 160 512 0 57344 0 -900 dbus-daemon
> Jul 4 20:00:12 pppve1 kernel: [3375932.264020] [ 1991] 0 1991 1767 275 83 192 0 57344 0 0 ksmtuned
> Jul 4 20:00:12 pppve1 kernel: [3375932.276094] [ 1995] 0 1995 69541 480 64 416 0 86016 0 0 pve-lxc-syscall
> Jul 4 20:00:12 pppve1 kernel: [3375932.289686] [ 2002] 0 2002 1330 384 32 352 0 53248 0 0 qmeventd
> Jul 4 20:00:12 pppve1 kernel: [3375932.301811] [ 2003] 0 2003 55449 727 247 480 0 86016 0 0 rsyslogd
> Jul 4 20:00:12 pppve1 kernel: [3375932.313919] [ 2004] 0 2004 3008 928 448 480 0 69632 0 0 smartd
> Jul 4 20:00:12 pppve1 kernel: [3375932.325834] [ 2009] 0 2009 6386 992 224 768 0 77824 0 0 systemd-logind
> Jul 4 20:00:12 pppve1 kernel: [3375932.339438] [ 2010] 0 2010 584 256 0 256 0 40960 0 -1000 watchdog-mux
> Jul 4 20:00:12 pppve1 kernel: [3375932.352936] [ 2021] 0 2021 60174 928 256 672 0 90112 0 0 zed
> Jul 4 20:00:12 pppve1 kernel: [3375932.364626] [ 2136] 0 2136 75573 256 64 192 0 86016 0 -1000 lxcfs
> Jul 4 20:00:12 pppve1 kernel: [3375932.376485] [ 2397] 0 2397 2208 480 64 416 0 61440 0 0 lxc-monitord
> Jul 4 20:00:12 pppve1 kernel: [3375932.389169] [ 2421] 0 2421 40673 454 70 384 0 73728 0 0 apcupsd
> Jul 4 20:00:12 pppve1 kernel: [3375932.400685] [ 2426] 0 2426 3338 428 172 256 0 69632 0 0 iscsid
> Jul 4 20:00:12 pppve1 kernel: [3375932.412121] [ 2427] 0 2427 3464 3343 431 2912 0 77824 0 -17 iscsid
> Jul 4 20:00:12 pppve1 kernel: [3375932.423754] [ 2433] 0 2433 3860 1792 320 1472 0 77824 0 -1000 sshd
> Jul 4 20:00:12 pppve1 kernel: [3375932.435208] [ 2461] 0 2461 189627 2688 1344 1344 0 155648 0 0 dsm_ism_srvmgrd
> Jul 4 20:00:12 pppve1 kernel: [3375932.448290] [ 2490] 113 2490 4721 750 142 608 0 61440 0 0 chronyd
> Jul 4 20:00:12 pppve1 kernel: [3375932.459988] [ 2492] 113 2492 2639 502 118 384 0 61440 0 0 chronyd
> Jul 4 20:00:12 pppve1 kernel: [3375932.471684] [ 2531] 0 2531 1469 448 32 416 0 49152 0 0 agetty
> Jul 4 20:00:12 pppve1 kernel: [3375932.483269] [ 2555] 0 2555 126545 673 244 429 0 147456 0 0 rrdcached
> Jul 4 20:00:12 pppve1 kernel: [3375932.483275] [ 2582] 0 2582 155008 15334 3093 864 11377 434176 0 0 pmxcfs
> Jul 4 20:00:12 pppve1 kernel: [3375932.506653] [ 2654] 0 2654 10667 614 134 480 0 77824 0 0 master
> Jul 4 20:00:12 pppve1 kernel: [3375932.517986] [ 2656] 107 2656 10812 704 160 544 0 73728 0 0 qmgr
> Jul 4 20:00:12 pppve1 kernel: [3375932.529118] [ 2661] 0 2661 139892 41669 28417 2980 10272 405504 0 0 corosync
> Jul 4 20:00:12 pppve1 kernel: [3375932.540553] [ 2662] 0 2662 1653 576 32 544 0 53248 0 0 cron
> Jul 4 20:00:12 pppve1 kernel: [3375932.551657] [ 2664] 0 2664 1621 480 96 384 0 57344 0 0 proxmox-firewal
> Jul 4 20:00:12 pppve1 kernel: [3375932.564093] [ 3164] 0 3164 83332 26227 25203 768 256 360448 0 0 pve-firewall
> Jul 4 20:00:12 pppve1 kernel: [3375932.576192] [ 3233] 0 3233 85947 28810 27242 1216 352 385024 0 0 pvestatd
> Jul 4 20:00:12 pppve1 kernel: [3375932.587638] [ 3417] 0 3417 93674 36011 35531 480 0 438272 0 0 pvedaemon
> Jul 4 20:00:12 pppve1 kernel: [3375932.599167] [ 3421] 0 3421 95913 37068 35884 1120 64 454656 0 0 pvedaemon worke
> Jul 4 20:00:12 pppve1 kernel: [3375932.611536] [ 3424] 0 3424 96072 36972 35852 1088 32 454656 0 0 pvedaemon worke
> Jul 4 20:00:12 pppve1 kernel: [3375932.623977] [ 3426] 0 3426 96167 37068 35948 1056 64 458752 0 0 pvedaemon worke
> Jul 4 20:00:12 pppve1 kernel: [3375932.636698] [ 3558] 0 3558 90342 29540 28676 608 256 385024 0 0 pve-ha-crm
> Jul 4 20:00:12 pppve1 kernel: [3375932.648477] [ 3948] 33 3948 94022 37705 35849 1856 0 471040 0 0 pveproxy
> Jul 4 20:00:12 pppve1 kernel: [3375932.660083] [ 3954] 33 3954 21688 14368 12736 1632 0 221184 0 0 spiceproxy
> Jul 4 20:00:12 pppve1 kernel: [3375932.671862] [ 3956] 0 3956 90222 29321 28521 544 256 397312 0 0 pve-ha-lrm
> Jul 4 20:00:12 pppve1 kernel: [3375932.683484] [ 3994] 0 3994 1290140 706601 705993 608 0 6389760 0 0 kvm
> Jul 4 20:00:12 pppve1 kernel: [3375932.694551] [ 4088] 0 4088 1271416 1040767 1040223 544 0 8994816 0 0 kvm
> Jul 4 20:00:12 pppve1 kernel: [3375932.705624] [ 4160] 0 4160 89394 30149 29541 608 0 380928 0 0 pvescheduler
> Jul 4 20:00:12 pppve1 kernel: [3375932.717864] [ 4710] 0 4710 1375 480 32 448 0 57344 0 0 agetty
> Jul 4 20:00:12 pppve1 kernel: [3375932.729183] [ 5531] 0 5531 993913 567351 566647 704 0 5611520 0 0 kvm
> Jul 4 20:00:12 pppve1 kernel: [3375932.740212] [ 6368] 0 6368 5512483 4229046 4228342 704 0 34951168 0 0 kvm
> Jul 4 20:00:12 pppve1 kernel: [3375932.751255] [ 9796] 0 9796 1941 768 64 704 0 57344 0 0 lxc-start
> Jul 4 20:00:12 pppve1 kernel: [3375932.762840] [ 9808] 100000 9808 3875 160 32 128 0 77824 0 0 init
> Jul 4 20:00:12 pppve1 kernel: [3375932.774063] [ 11447] 100000 11447 9272 192 64 128 0 118784 0 0 rpcbind
> Jul 4 20:00:12 pppve1 kernel: [3375932.785534] [ 11620] 100000 11620 45718 240 112 128 0 126976 0 0 rsyslogd
> Jul 4 20:00:12 pppve1 kernel: [3375932.797241] [ 11673] 100000 11673 4758 195 35 160 0 81920 0 0 atd
> Jul 4 20:00:12 pppve1 kernel: [3375932.808516] [ 11748] 100000 11748 6878 228 36 192 0 98304 0 0 cron
> Jul 4 20:00:12 pppve1 kernel: [3375932.819868] [ 11759] 100102 11759 10533 257 65 192 0 122880 0 0 dbus-daemon
> Jul 4 20:00:12 pppve1 kernel: [3375932.832328] [ 11765] 100000 11765 13797 315 155 160 0 143360 0 0 sshd
> Jul 4 20:00:12 pppve1 kernel: [3375932.843547] [ 11989] 100104 11989 565602 19744 288 160 19296 372736 0 0 postgres
> Jul 4 20:00:12 pppve1 kernel: [3375932.855266] [ 12169] 100104 12169 565938 537254 678 192 536384 4517888 0 0 postgres
> Jul 4 20:00:12 pppve1 kernel: [3375932.866950] [ 12170] 100104 12170 565859 199654 550 224 198880 4296704 0 0 postgres
> Jul 4 20:00:12 pppve1 kernel: [3375932.878525] [ 12171] 100104 12171 565859 4710 358 224 4128 241664 0 0 postgres
> Jul 4 20:00:12 pppve1 kernel: [3375932.890252] [ 12172] 100104 12172 565962 7654 518 192 6944 827392 0 0 postgres
> Jul 4 20:00:12 pppve1 kernel: [3375932.901845] [ 12173] 100104 12173 20982 742 518 224 0 200704 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375932.913421] [ 13520] 100000 13520 9045 192 128 64 0 114688 0 0 master
> Jul 4 20:00:13 pppve1 kernel: [3375932.924809] [ 13536] 100100 13536 9601 320 128 192 0 126976 0 0 qmgr
> Jul 4 20:00:13 pppve1 kernel: [3375932.936088] [ 13547] 100000 13547 3168 192 32 160 0 73728 0 0 getty
> Jul 4 20:00:13 pppve1 kernel: [3375932.947424] [ 13548] 100000 13548 3168 160 32 128 0 73728 0 0 getty
> Jul 4 20:00:13 pppve1 kernel: [3375932.958761] [1302486] 0 1302486 1941 768 96 672 0 53248 0 0 lxc-start
> Jul 4 20:00:13 pppve1 kernel: [3375932.970490] [1302506] 100000 1302506 2115 128 32 96 0 65536 0 0 init
> Jul 4 20:00:13 pppve1 kernel: [3375932.981999] [1302829] 100001 1302829 2081 128 0 128 0 61440 0 0 portmap
> Jul 4 20:00:13 pppve1 kernel: [3375932.993763] [1302902] 100000 1302902 27413 160 64 96 0 122880 0 0 rsyslogd
> Jul 4 20:00:13 pppve1 kernel: [3375933.005719] [1302953] 100000 1302953 117996 1654 1366 227 61 450560 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.017459] [1302989] 100000 1302989 4736 97 33 64 0 81920 0 0 atd
> Jul 4 20:00:13 pppve1 kernel: [3375933.028905] [1303004] 100104 1303004 5843 64 32 32 0 94208 0 0 dbus-daemon
> Jul 4 20:00:13 pppve1 kernel: [3375933.041272] [1303030] 100000 1303030 12322 334 110 224 0 139264 0 0 sshd
> Jul 4 20:00:13 pppve1 kernel: [3375933.052755] [1303048] 100000 1303048 5664 64 32 32 0 94208 0 0 cron
> Jul 4 20:00:13 pppve1 kernel: [3375933.064220] [1303255] 100000 1303255 9322 224 96 128 0 118784 0 0 master
> Jul 4 20:00:13 pppve1 kernel: [3375933.075896] [1303284] 100101 1303284 9878 352 128 224 0 122880 0 0 qmgr
> Jul 4 20:00:13 pppve1 kernel: [3375933.087405] [1303285] 100000 1303285 1509 32 0 32 0 61440 0 0 getty
> Jul 4 20:00:13 pppve1 kernel: [3375933.099008] [1303286] 100000 1303286 1509 64 0 64 0 61440 0 0 getty
> Jul 4 20:00:13 pppve1 kernel: [3375933.110571] [1420994] 33 1420994 21749 13271 12759 512 0 204800 0 0 spiceproxy work
> Jul 4 20:00:13 pppve1 kernel: [3375933.123378] [1421001] 33 1421001 94055 37044 35892 1152 0 434176 0 0 pveproxy worker
> Jul 4 20:00:13 pppve1 kernel: [3375933.136284] [1421002] 33 1421002 94055 36980 35860 1120 0 434176 0 0 pveproxy worker
> Jul 4 20:00:13 pppve1 kernel: [3375933.149173] [1421003] 33 1421003 94055 37044 35892 1152 0 434176 0 0 pveproxy worker
> Jul 4 20:00:13 pppve1 kernel: [3375933.162040] [2316827] 0 2316827 6820 1088 224 864 0 69632 0 -1000 systemd-udevd
> Jul 4 20:00:13 pppve1 kernel: [3375933.174778] [2316923] 0 2316923 51282 2240 224 2016 0 438272 0 -250 systemd-journal
> Jul 4 20:00:13 pppve1 kernel: [3375933.187768] [3148356] 0 3148356 32681 21120 19232 1888 0 249856 0 0 glpi-agent (tag
> Jul 4 20:00:13 pppve1 kernel: [3375933.200481] [3053571] 0 3053571 19798 480 32 448 0 57344 0 0 pvefw-logger
> Jul 4 20:00:13 pppve1 kernel: [3375933.212970] [3498513] 100033 3498513 119792 7207 2632 223 4352 516096 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.224713] [3498820] 100104 3498820 575918 235975 9351 160 226464 3424256 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.236579] [3500997] 100033 3500997 119889 7202 2594 192 4416 524288 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.248240] [3501657] 100104 3501657 571325 199025 6001 160 192864 2945024 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.260100] [3502514] 100033 3502514 119119 5907 2004 191 3712 503808 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.271772] [3503679] 100104 3503679 575295 211508 6612 192 204704 2953216 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.283619] [3515234] 100033 3515234 119042 6568 1960 192 4416 503808 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.295362] [3515420] 100104 3515420 569839 97579 4491 160 92928 2293760 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.307155] [3520282] 100033 3520282 119129 5416 2056 192 3168 495616 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.318923] [3520287] 100033 3520287 119015 5709 1894 167 3648 503808 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.330805] [3520288] 100033 3520288 119876 5961 2729 224 3008 507904 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.342648] [3521057] 100104 3521057 573824 46069 8341 128 37600 1830912 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.354567] [3521067] 100104 3521067 574768 99734 7446 96 92192 2134016 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.366512] [3521301] 100104 3521301 569500 174722 4194 160 170368 2482176 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.378484] [3532810] 100033 3532810 118740 4127 1727 160 2240 479232 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.390140] [3532933] 100033 3532933 118971 5064 1864 160 3040 503808 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.401854] [3534151] 100104 3534151 567344 168822 1686 160 166976 2408448 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.413852] [3535832] 100104 3535832 569005 41042 2578 128 38336 1150976 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.425919] [3550993] 100033 3550993 118029 1768 1544 224 0 425984 0 0 apache2
> Jul 4 20:00:13 pppve1 kernel: [3375933.437868] [3560475] 107 3560475 10767 928 160 768 0 77824 0 0 pickup
> Jul 4 20:00:13 pppve1 kernel: [3375933.449513] [3563017] 100101 3563017 9838 256 96 160 0 122880 0 0 pickup
> Jul 4 20:00:13 pppve1 kernel: [3375933.461255] [3575085] 100100 3575085 9561 288 128 160 0 118784 0 0 pickup
> Jul 4 20:00:13 pppve1 kernel: [3375933.473119] [3579986] 0 3579986 1367 384 0 384 0 49152 0 0 sleep
> Jul 4 20:00:13 pppve1 kernel: [3375933.484646] [3579996] 100104 3579996 566249 5031 615 128 4288 450560 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.496645] [3580020] 0 3580020 91269 30310 29606 704 0 409600 0 0 pvescheduler
> Jul 4 20:00:13 pppve1 kernel: [3375933.509585] [3580041] 0 3580041 5005 1920 640 1280 0 81920 0 100 systemd
> Jul 4 20:00:13 pppve1 kernel: [3375933.521297] [3580044] 0 3580044 42685 1538 1218 320 0 102400 0 100 (sd-pam)
> Jul 4 20:00:13 pppve1 kernel: [3375933.533226] [3580125] 100104 3580125 566119 5607 583 704 4320 446464 0 0 postgres
> Jul 4 20:00:13 pppve1 kernel: [3375933.545245] [3580193] 0 3580193 4403 2368 384 1984 0 81920 0 0 sshd
> Jul 4 20:00:13 pppve1 kernel: [3375933.556849] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=qemu.slice,mems_allowed=0,global_oom,task_memcg=/qemu.slice/121.scope,task=kvm,pid=6368,uid=0
> Jul 4 20:00:13 pppve1 kernel: [3375933.573133] Out of memory: Killed process 6368 (kvm) total-vm:22049932kB, anon-rss:16913368kB, file-rss:2944kB, shmem-rss:0kB, UID:0 pgtables:34132kB oom_score_adj:0
> Jul 4 20:00:15 pppve1 kernel: [3375935.378441] zd16: p1 p2 p3 < p5 p6 >
> Jul 4 20:00:16 pppve1 kernel: [3375936.735383] oom_reaper: reaped process 6368 (kvm), now anon-rss:0kB, file-rss:32kB, shmem-rss:0kB
> Jul 4 20:01:11 pppve1 kernel: [3375991.767379] vmbr0: port 5(tap121i0) entered disabled state
> Jul 4 20:01:11 pppve1 kernel: [3375991.778143] tap121i0 (unregistering): left allmulticast mode
> Jul 4 20:01:11 pppve1 kernel: [3375991.785976] vmbr0: port 5(tap121i0) entered disabled state
> Jul 4 20:01:11 pppve1 kernel: [3375991.791555] zd128: p1
> Jul 4 20:01:13 pppve1 kernel: [3375993.594688] zd176: p1 p2
>
>
>> Makes few sense that OOM triggers in 64GB hosts with just 24GB configured in
>> VMs and, probably, less real usage. IMHO it's not VMs what fill your memory
>> up to the point of OOM, but some other process, ZFS ARC, maybe even some mem
>> leak. Maybe some process is producing severe memory fragmentation.
> i can confirm that server was doing some heavy I/O (backup), but AFAIK
> nothing more.
>
>
> Mandi! Roland
>
>> it's a little bit weird that OOM kicks in with VMs <32GB RAM when you have 64GB
>> take a closer look why this happens , i.e. why OOM thinks there is ram pressure
> effectively server was running:
> + vm 100, 2GB
> + vm 120, 4GB
> + vm 121, 16GB
> + vm 127, 4GB
> + lxc 124, 2GB
> + lxc 125, 4GB
>
> so exactly 32GB of RAM. But most of the VM/LXC barely arrived at half of the
> allocated RAM...
>
>
>
> Thanks.
>
--
_______________________________________________
SOLTECSIS SOLUCIONES TECNOLOGICAS, S.L.
Víctor Rodríguez Cortés
Teléfono: 966 446 046
vrodriguez at soltecsis.com
www.soltecsis.com
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