Isilon: /var/log-meldingene på noen noder vises meldinger om ikke minne fra tid til annen

Summary: /var/log-meldingene på noen noder viser disse feilmeldingene om ikke minne (OOM) fra tid til annen: OOM: v_wire_count: 2832982, v_active_count: 516

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Symptoms

 Et komplett meldingssett ser slik ut:  
2021-08-17T14:40:50.703082+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: OOM: v_wire_count: 2843879, v_active_count: 871
2021-08-17T14:40:50.703246+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: Malloc Pigs:
2021-08-17T14:40:50.703277+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: Type                   InUse   MemUse   Requests
2021-08-17T14:40:50.703303+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: 8kB dinodes           840507  647775K 13330759531
2021-08-17T14:40:50.703325+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: isi_hash               31424   88002K 1548035744
2021-08-17T14:40:50.703344+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: lbm super              17535   84150K    1435677
2021-08-17T14:40:50.703362+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: layout_hints          183473   57336K   22320273
2021-08-17T14:40:50.703379+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: iaddr_set             886694   55419K 5188138062
2021-08-17T14:40:50.703397+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: devbuf                 17379   37840K     184744
2021-08-17T14:40:50.703414+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: newblk                    26   32774K    2364548
2021-08-17T14:40:50.703432+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: bar_owner_vec259         261   32288K    2220148
2021-08-17T14:40:50.703451+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: parent_vec153         218013   27538K    4567646
2021-08-17T14:40:50.703475+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: ddvec84               183471   22840K  177809736
2021-08-17T14:40:50.703496+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: inodedep                  22   16390K    1677902
2021-08-17T14:40:50.703515+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: sysctloid             201426   10989K     201598
2021-08-17T14:40:50.703535+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: vfscache                   4    8241K          4
2021-08-17T14:40:50.703555+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: KTR                        2    7168K          2
2021-08-17T14:40:50.703574+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: ptr_llcb_map           56126    7017K  116151979
2021-08-17T14:40:50.703592+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: Unshown bins account for 84039K
2021-08-17T14:40:50.703611+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: Total: 1219801K
2021-08-17T14:40:50.703630+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: UMA Zalloc Pigs:
2021-08-17T14:40:50.703648+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: ZONE NAME       SIZE     LIMIT     COUNT   MEM USED
2021-08-17T14:40:50.703668+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: mbuf          000256, 06012268, 00017191, 00004297K
2021-08-17T14:40:50.703687+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: socket        000872, 00765000, 00002327, 00001981K
2021-08-17T14:40:50.703704+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: tcpcb         001080, 00765000, 00001652, 00001742K
2021-08-17T14:40:50.703722+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: tcp_inpcb     000488, 00765000, 00001665, 00000793K
2021-08-17T14:40:50.703740+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: udp_inpcb     000488, 00765000, 00000270, 00000128K
2021-08-17T14:40:50.703758+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: unpcb         000192, 00765000, 00000391, 00000073K
2021-08-17T14:40:50.703776+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: hostcache     000096, 00015360, 00000191, 00000017K
2021-08-17T14:40:50.703794+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: udpcb         000032, 00765000, 00000270, 00000008K
2021-08-17T14:40:50.703812+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: clpbuf        001016, 00015872, 00000006, 00000005K
2021-08-17T14:40:50.703832+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: tcptw         000096, 00027767, 00000013, 00000001K
2021-08-17T14:40:50.703853+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: ripcb         000488, 00765000, 00000001, 00000000K
2021-08-17T14:40:50.703872+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: Unshown zones account for 0K
2021-08-17T14:40:50.703890+12:00 <0.4> cluster-1(id1) /boot/kernel.amd64/kernel: Total: 9051K

Cause

En ny OneFS-funksjon som ble introdusert i OneFS 9.2, legger til disse meldingene. 
Denne nye funksjonen logger informasjon om minnebruk hver gang en pageout-funksjon kalles av pagedaemon når den ikke er i stand til å bringe ledig minne over free_target.
Operativsystemet kaller proaktivt funksjonen ovenfor for å logge informasjon i tilfelle minnet blir ytterligere lavt, og noden slutter å svare eller får panikk.

Resolution

Viktig:
Hvis noden bare har 16 GB RAM, anbefaler du brukeren å oppgradere til 64 GB.

Hvis noden har 24 GB RAM eller mer, kan disse meldingene trygt ignoreres hvis alle disse betingelsene er oppfylt:

  • /var/log/vmlog viser at det frie minnet ofte ikke gikk under 50 % ledig mål
  • Ingen noder i klyngen slår panikk på nytt med BUF_TIMELOCK eller andre OOM-relaterte tidsavbruddsmeldinger i panikkstrengen
  • Informasjonen i freevnodes sysctl Viser aktivert (verdi på 1) på tvers av alle noder:
# isi_for_array 'sysctl vfs.vnlru_reuse_freevnodes'

Merk:
Husk å endre sysctl vfs.vnlru_reuse_freevnodes Tilbake til standardverdien (0 - null) hvis alle følgende betingelser er oppfylt:
  • Noden har 24 GB eller mer fysisk minne
  • Informasjonen i vnlru_reuse_freevnodes=1 innstillingen ble opprinnelig lagt til for å takle problemet med høye 8 KB dinoder
  • OneFS-versjonen oppgraderes til ett av disse nivåene eller nyere:
    • OneFS 9.2.1.25_GA-RUP_2023-12
    • OneFS 9.4.0.17_GA-RUP_2024-02
    • OneFS 9.5.0.7_LTS2023_GA-RUP (januar 2024)
Article Properties
Article Number: 000191515
Article Type: Solution
Last Modified: 03 Apr 2024
Version:  5
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