Re: Large Pages - Oracle on Windows

On 1/27/16 9:56 AM, Alvaro Jose Fernandez wrote:
>
> I have them implemented in a 11gR2 RAC cluster and it works very well
> - faster CPU processing and much less paging activity on the server.
>
> But (as the link Andrew posted remarks) do notice that (in a RAC
> environment, I suppose equally applicable to non-RAC instances) if you
> stop the instance, to start it again you would need to restart the
> operating system as well, as there are issues with memory reclamation
> by the OS when using LP. This happens to me every time (20 Gb memory
> allocated to a RAC instance, in a 32 Gb server with Windows 2008 R2
> SP1). I don't know if that changed in 12c or Windows 2012.
>
> Alvaro,
>
> ------------------------------------------------------------------------
> *De:* oracle-l-bounce_at_freelists.org [oracle-l-bounce_at_freelists.org] en
> nombre de Andrew Kerber [andrew.kerber_at_gmail.com]
> *Enviado:* miércoles, 27 de enero de 2016 16:09
> *Para:* MJ Mody
> *CC:* oracle-l
> *Asunto:* Re: Large Pages - Oracle on Windows
>
> Yes, windows implementation is very different. Here is a link to
> instructions on largepage implementation in windows. I wrote it some
> time ago.:
>
> https://dbakerber.wordpress.com/2013/07/21/large-pages-implementation-in-windows/
>
> On Wed, Jan 27, 2016 at 9:04 AM, MJ Mody <emjay.mody_at_gmail.com
> <mailto:emjay.mody_at_gmail.com>> wrote:
>
> Huge-pages is a Linux supported feature? Is there any difference
> in Windows implementations?
>
> On Jan 27, 2016, at 8:52 AM, Andrew Kerber
> <andrew.kerber_at_gmail.com <mailto:andrew.kerber_at_gmail.com>> wrote:
>
>> I use them all the time. The have fairly large CPU benefits in
>> Virtualized environments, smaller but still noticeable CPU
>> improvements in physical environments. The key item is to
>> allocate enough hugepages for your entire sga. If you are using
>> OVM, make sure your version supports them directly, early
>> versions translated them to standard page size.
>>
>> On Wed, Jan 27, 2016 at 8:16 AM, MJ Mody <emjay.mody_at_gmail.com
>> <mailto:emjay.mody_at_gmail.com>> wrote:
>>
>> Oracle SMEs
>> Reaching out to see if anyone has Large Pages implemented and
>> any lessons learned that one would share. I have a 12c
>> dev/test environment upgrade coming up and considering to
>> enable this feature.
>>
>> Any guidance is greatly appreciated.
>>
>> Thank you in advance.
>>
>> Regards
>> MJ
>> --
>> http://www.freelists.org/webpage/oracle-l
>>
>>
>>
>>
>>
>> --
>> Andrew W. Kerber
>>
>> 'If at first you dont succeed, dont take up skydiving.'
>
>
>
>
> --
> Andrew W. Kerber
>
> 'If at first you dont succeed, dont take up skydiving.'

--
http://www.freelists.org/webpage/oracle-l