[Ocfs2-users] out of memory problem concerning 64-bits?

[Michał Wilkowski]

Hello,

[root at NPP_apl_04 ~]# egrep 'ocfs|dlm|size-256 |size-32 ' /proc/slabinfo
ocfs2_lock           286    452     16  226    1 : tunables  120   60    
8 : slabdata      2      2      0
ocfs2_inode_cache  27155  27432    896    4    1 : tunables   54   27    
8 : slabdata   6858   6858      0
ocfs2_uptodate       388    476     32  119    1 : tunables  120   60    
8 : slabdata      4      4      0
ocfs2_em_ent       25831  26169     64   61    1 : tunables  120   60    
8 : slabdata    429    429      0
dlmfs_inode_cache      1      6    640    6    1 : tunables   54   27    
8 : slabdata      1      1      0
dlm_mle_cache          0      0    384   10    1 : tunables   54   27    
8 : slabdata      0      0      0
size-256          102189 102195    256   15    1 : tunables  120   60    
8 : slabdata   6813   6813      0
size-32           105223 105434     32  119    1 : tunables  120   60    
8 : slabdata    886    886      0
[root at NPP_apl_04 ~]# cat /proc/fs/ocfs2_dlm/*/stat
local=17197, remote=0, unknown=0
local=57791, remote=0, unknown=0
local=26553, remote=0, unknown=0

we are currently running only one node and oom-kills occur regularly 
(once within a few days). I suppose that OCFS2 eats memory because since 
OCFS2 filesystem has been mounted, the LowMemory is decreasing and the 
number of OCFS2 locks is increasing (as you can see in the output).

Can you give the hint what I can read in slabinfo?

Regards
Michal Wilkowski

Sunil Mushran napisał(a):
> Are you sure it is ocfs2 that is eating memory?
>
> # egrep 'ocfs|dlm|size-256 |size-32 ' /proc/slabinfo
> # cat /proc/fs/ocfs2_dlm/*/stat
>
> Email the outputs.
>
> Michał Wilkowski wrote:
>> Hello,
>> we are currently running in production the system based on Redhat 
>> Enterprise Linux 4 Update 3, ver. 32-bits. We are periodically 
>> encountering an OOM-killer problem. Problem was discussed in previous 
>> posts.
>>
>> I have a question: does it concern only 32-bits systems or 64-bits as 
>> well?
>> On 32-bits system OCFS2 driver consumes Low Memory (only ~900 MB) and 
>> therefore causes oom-kills. What about 64-bits systems? Does it 
>> consume all memory available for system (in my case: 8 GB)  and 
>> therefore it takes much longer to encounter oom-kills?
>>
>> It is a very important issue for me and a response would be greatly 
>> appreciated.
>>
>> Regards
>> Michal Wilkowski
>>
>> _______________________________________________
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>> Ocfs2-users at oss.oracle.com
>> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>
>