Re: c-states

From: <niall.litchfield_at_gmail.com>
Date: Fri, 18 Oct 2019 10:08:16 +0100
Message-ID: <CABe10sYK-DAy12g4pCNS_Jw6pRO1cpXxJXXJUW5qL=biYNoKVQ_at_mail.gmail.com>



We do. The recommendation also appears in various hardware vendor documents - see for example
https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/unified-computing/whitepaper-c11-737931.html  .

What any given cloud provider does, of course, is probably not documented.

On Fri, Oct 18, 2019 at 8:06 AM Noveljic Nenad <nenad.noveljic_at_vontobel.com> wrote:

> Do you generally disable c-state transitions ( see
> https://software.intel.com/en-us/articles/power-management-states-p-states-c-states-and-package-c-states
> ) on your database servers?
>
>
>
> If so, why?
>
>
>
> The reason I'm asking is that every couple of years we hit a bug causing a
> delay when the core is waking up, so we have to turn the c-states off until
> that bug gets fixed.
>
>
>
> Best regards,
>
>
>
> Nenad Noveljic
>
>
>
> https://nenadnoveljic.com/blog
>
>
>
>
>
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-- 
Niall Litchfield
Oracle DBA
http://www.orawin.info

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Received on Fri Oct 18 2019 - 11:08:16 CEST

Original text of this message