Re: [PVE-User] A less aggressive OOM?

Thu, 10 Jul 2025 07:36:06 -0700

--- Begin Message --- if OOM kicks in because half of the ram is being used for caches/buffers, i would blame OOMkiller or ZFS for tha. The problem should be resolved at zfs or memory management level.
Why kill processes instead of reclaiming arc ? i think that's totally wrong behaviour. 


will watch out for appropriate zfs github issue or we should consider 
open up one.


roland

Am 10.07.25 um 10:56 schrieb Victor Rodriguez:

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.



--- End Message ---


_______________________________________________
pve-user mailing list
pve-user@lists.proxmox.com
https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user






















					Reply via email to