[Ocfs2-users] Slow OCFS2 file creation / how to make ocfs2 generally faster?

[Stefan Priebe - Profihost AG]

Am 22.08.2011 23:27, schrieb Sunil Mushran:
> On 08/22/2011 11:11 AM, Stefan Priebe - Profihost AG wrote:
>>>>> BTW, how much memory do the nodes have?
>>>>> Lock Resources: 1863 (497079)
>>>>>
>>>>> This means that that node has created 497K lock resources
>>>>> but have under 2000 cached. That could be due to deletes
>>>>> or could be due to lack of memory (lock churning).
>>>> They all have 8GB of mem but only 1,5-2,5 are in use regarding free
>>>> command. What does lock churning mean and is there another setting /
>>>> value i can look at?
>>>
>>> Its tied to the inode cache. As long as the inode is cached,
>>> the lock resource will be cached.
>> Thanks for your answer but i didn't get it. It is enough "main" memory
>> free. Or is this to some special kind of memory? perhaps tuneable via
>> sysctl?
>>
>
> inode cache. I don't think you can pin the size of this cache.
> It size varies. But we are jumping to conclusions. Right now we
> don't know whether that is the problem as the numbers you sent
> me were fairly random.

ok here is a new complete test with values before and after and all 
bonnie details.

File creation and seq. delete drops again massively.

Stefan
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