Re: FreeBSD is very slow when Memory chip sizes are imbalanced in slots

From: Steven Hartland <killing_at_multiplay.co.uk>
Date: Mon, 18 Mar 2013 15:21:43 -0000
>> ----- Original Message ----- From: Mehmet Erol Sanliturk
>>>
>>> Surely you can eliminate all of those and confirm / deny the original
>>>> diagnosis by simply installing balanced memory in the machine and
>>>> checking
>>>> to see if the problem goes away?
>>>>
>>>
>>> Please see links in my previous mails .
>>> All of these are worked in detail .
>>>
>>> This is Intel DG965WH main board and I do not know much about NUMA , but
>>> with respect to Wikipedia Non-Uniform_Memory_Access  page , it seems that
>>> there is no NUMA structure in this main board .
>>>
>>
>> But have you installed balanced memory and confirmed the problem goes away?
>
> Yes .
>
>
> http://lists.freebsd.org/pipermail/freebsd-current/2012-February/031836.html
> http://lists.freebsd.org/pipermail/freebsd-current/2012-February/031912.html
> http://lists.freebsd.org/pipermail/freebsd-current/2012-February/031928.html
> http://lists.freebsd.org/pipermail/freebsd-current/2012-February/032012.html
>

You state there that "The main boards are the same" which indicates to me
the machines aren't the same machine which could result in some other subtle
difference causing the problem.

To confirm you'll need to use the "exact same machine" for tests with the only
difference being the ram modules installed.

    Regards
    Steve

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Received on Mon Mar 18 2013 - 14:21:39 UTC

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