[Ocfs2-users] out of memory?

[Sunil Mushran]

I would like the entire /proc/meminfo and /proc/slabinfo.
Dump it to a file every 1 min or so.

What version of the kernel/ocfs2?

Paul Jimenez wrote:
> On Jun 29, 2006, at 8:22 AM, Brian Long wrote:
>
>   
>> On Wed, 2006-06-28 at 17:03 -0500, Paul Jimenez wrote:
>>     
>>> I'm getting out of memory errors trying to do 'rsync -av /foo /bar'
>>> where /foo is a local dir and /bar is an ocfs2 filesystem running on
>>> an ~ 6T ATA-over-Ethernet box.
>>>       
>> Paul,
>>
>> Can you also include some information about your /foo partition?   
>> It is
>> millions of little files or hundreds of large files?  What is the  
>> RSS of
>> rsync when you run out of memory?
>>
>> http://samba.anu.edu.au/rsync/FAQ.html#5
>> http://lists.samba.org/archive/rsync/2002-July/003160.html
>>
>>     
>
> /foo is ~ 4600 files each about 60GB for a total of ~259GB.
>
> Some output after or slightly-before it crashed:
>
>
> Every 2s: cat /proc/slabinfo | sort -rnk 2 |  
> head                           Thu Jun 29 11:58:01 2006
>
> buffer_head       754620 754632     52   72    1 : tunables  120    
> 60    8 : slabdata  10481  10481
>       0
> bio               225600 225600    128   30    1 : tunables  120    
> 60    8 : slabdata   7520   7520
>       0
> biovec-1          225593 225736     16  203    1 : tunables  120    
> 60    8 : slabdata   1112   1112
>       0
> journal_head      175548 182448     52   72    1 : tunables  120    
> 60    8 : slabdata   2530   2534
>       0
> aoe_bufs          112536 112554     48   78    1 : tunables  120    
> 60    8 : slabdata   1443   1443
>       0
> radix_tree_node    41510  41510    276   14    1 : tunables   54    
> 27    8 : slabdata   2965   2965
>       0
> sysfs_dir_cache     3644   3772     40   92    1 : tunables  120    
> 60    8 : slabdata     41     41
>       0
> size-32             2938   4407     32  113    1 : tunables  120    
> 60    8 : slabdata     39     39
>       0
> size-64             2354   2596     64   59    1 : tunables  120    
> 60    8 : slabdata     44     44
>       0
> dentry_cache        2086   3090    128   30    1 : tunables  120    
> 60    8 : slabdata    103    103
>       0
>
>
> Free swap: 16779608kB
> 4718592 pages of RAM
> 4489216 pages of HIGHMEM
> 562809 reserved pages
> 530215 pages shared
> 0 pages swap cached
> 136994 pages dirty
> 61878 pages writeback
> 142502 pages mapped
> 29403 pages slab
> 480 pages pagetables
>
> 4718592 pages of RAM
> 4489216 pages of HIGHMEM
> 562809 reserved pages
> 530215 pages shared
> 0 pages swap cached
> 136994 pages dirty
> 61876 pages writeback
> 142502 pages mapped
> 29425 pages slab
> 480 pages pagetables
>
> I don't think it's rsync running things oom; its memory consumption  
> is filecount based and 4600 files just isn't that many.
>
> The tunables that I had in place from the AoE faq (http:// 
> www.coraid.com/support/linux/EtherDrive-2.6-HOWTO.html#toc5.18)
> this time were:
>
> vm.overcommit_memory=2
> vm.dirty_ratio=3
> vm.dirty_background_ratio=3
> vm.min_free_kbytes=5120
>
> Any help appreciated.
>
>    --pj
>
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