Out of memory

[Sylvain PORTIER <cabeur@xxxxxxx>]

Hi,

On my ceph osd servers I have lot of "out of memory messages".

My servers are configured with :

    - 32 G of memory

    - 11 HDD (3,5 T each) (+ 2 HDD for the system)

And the error messages are :

[101292.017968] Out of memory: Kill process 2597 (ceph-osd) score 102 or sacrifice child
[101292.018836] Killed process 2597 (ceph-osd) total-vm:5048008kB, anon-rss:3002648kB, file-rss:0kB, shmem-rss:0kB

Top result :

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
  75469 ceph      20   0 4982324 3,988g      0 S   0,7 12,7   3:45.05 ceph-osd
  75499 ceph      20   0 5095896 3,710g      0 S   0,3 11,8   4:08.93 ceph-osd
  65848 ceph      20   0 5713748 3,329g      0 S   0,0 10,6  68:49.12 ceph-osd
  67237 ceph      20   0 5580720 3,155g      0 S   0,0 10,1  57:15.99 ceph-osd
  71113 ceph      20   0 5557608 3,101g      0 S   0,3  9,9  36:47.69 ceph-osd
  74745 ceph      20   0 5117212 3,062g      0 S   3,7  9,8   8:13.56 ceph-osd
  72494 ceph      20   0 5621156 2,828g      0 S   0,3  9,0  27:19.97 ceph-osd
  70954 ceph      20   0 5765016 2,571g      0 S   0,3  8,2  40:02.00 ceph-osd
  74817 ceph      20   0 5139328 2,510g      0 S   0,3  8,0   7:24.33 ceph-osd
  76523 ceph      20   0 3324820 2,422g      0 S   0,3  7,7   0:55.54 ceph-osd

Is there a way to limit or reduce the memory usage of each osd deamon ?

Thank you,

Regards,

Sylvain PORTIER.

Garanti sans virus. www.avast.com

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