Re: Ceph killed by OS because of OOM under high load

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On Tue, Jun 4, 2013 at 2:20 PM, Chen, Xiaoxi <xiaoxi.chen@xxxxxxxxx> wrote:
> Hi Greg,
>         Yes, Thanks for your advice ,we do turn down the osd_client_message_size_cap to 100MB/OSD ,both Journal queue and filestore queue are set to 100MB also.
>         That's 300MB/OSD in total, but from TOP we see:
>                 16527     1  14:49.01     0  7.1  20   0 S 1147m    0 532m     0 ceph-osd
>                 17505     1  10:54.32     0  6.5  20   0 S 1111m    0 482m     0 ceph-osd
>                 18015     1  12:21.79     0  6.0  20   0 S 1041m    0 449m     0 ceph-osd
>                 17799     1  13:29.92     0  5.9  20   0 S 1085m    0 437m     0 ceph-osd
>                 17320     1  12:19.25     0  5.8  20   0 S 1079m    0 434m     0 ceph-osd
>                 18946     1  12:38.01     0  5.7  20   0 S 1082m    0 428m     0 ceph-osd
>                 16983     1  12:04.97     0  5.1  20   0 S 1045m    0 383m     0 ceph-osd
>                 19120     1  12:57.84     0  4.9  20   0 S 1003m    0 367m     0 ceph-osd
>                 16300     1  12:17.18     0  4.8  20   0 S  979m    0 361m     0 ceph-osd
>                 18494     1  13:13.04     0  4.5  20   0 S  950m    0 339m     0 ceph-osd
>                 16662     1  13:14.84     0  4.3  20   0 S  964m    0 318m     0 ceph-osd
>                 18285     1  11:07.79     0  3.7  20   0 S  895m    0 276m     0 ceph-os
>
>         Most of the OSD daemons are slightly exceed 300MB, , so what part of code/modules take out these memory?
>         Or in another word, a more general question, is it able to draw out a pie chart, showing percentages of memory used by each modules in OSD?
>

http://google-perftools.googlecode.com/svn/trunk/doc/heapprofile.html

Regards
Yan, Zheng
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