[Ocfs2-users] Ocfs2 and low memory

[John Peeken, Enterprise Linux Support]

Rafal,
See if you have vm.lower_zone_protection set?
# cat /proc/sys/vm/lower_zone_protection
If not set, then set to 100 and viola all your low mem issues should vanish.
You can use top -p <pid> , for the pid for ocfs2 and see how it is using 
memory

But, with RHEL4 to eliminate any source of an OOM - set 
vm.lower_zone_protection=100 in /etc/sysctl.conf

Regards,
John Peeken




Rafal Maliszewski wrote:

> Redhat 4ES update 3 - kernel 2.6.9.34-smp
>
> Something is eating low memory, not highmem.
> Howto check that there is not ocfs2??
>
>
>
> On 10/31/06, John Peeken, Enterprise Linux Support 
> <john.peeken at oracle.com <mailto:john.peeken at oracle.com>> wrote:
>
>     Rafal,
>     What version of Red Hat are you using?
>     cat /proc/meminfo will show us how memory (Low and High) is doing,
>     top will show how much a process is using of virtual memory
>     How much memory?  What kernel is being used?
>     Regards,
>     John Peeken
>
>
>
>     Rafal Maliszewski wrote:
>
>>     Hi guys
>>
>>     I have 4 node cluster with OCFS2.
>>     From time to time redhat fired : oom-killer to kill process with
>>     high amout of memory ( for example tomcat)
>>
>>     My friends suppose that ocfs2 consume memory.
>>
>>     So I have question:
>>     How check how many memory is occupied by ocfs processes?
>>     Is it a low memory?
>>
>>     regards
>>
>>
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>>
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>>
>
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