Re: ASSM - dynamic memory resizing

Amir,

Do you have any additional information on memory mapping of the 6
boards and main memory details.. ?

BTW is it Sun Solairs? I guess the locality 0-5 coming from six boards
(NUMA allocation) and 129 is coming from main memory. Check the
following patent
(http://www.patentstorm.us/patents/6021479-claims.html) for some
interesting information for memory allocations on locality domains.


-Gopal

On Nov 30, 2007 11:56 AM, Hameed, Amir <Amir.Hameed@xxxxxxxxx> wrote:
>
>  When I run the following statement, I see the result as shown below:
> select LOCALITY, sum(GRANSIZE) gransize from sys.x$ksmge group by
> LOCALITY
> ;
>
>   LOCALITY        SUM_GRANSIZE
> ---------- ---------------
>        129   3,254,779,904
>          5   2,130,706,432
>          1   2,147,483,648
>          2   2,130,706,432
>          3   2,130,706,432
>          0   2,147,483,648
>          4   2,130,706,432
>            ---------------
> sum         16,072,572,928
>
> I understand that numbers 0-5 refer to the memory boards on the system.
> In my case there are six boards (24 dual-core CPUs) and each board has
> memory on it. What does number 129 refer to?
>
>
> -----Original Message-----
> From: Taylor, Chris David [mailto:Chris.Taylor@xxxxxxxxxxxxxxx]
> Sent: Friday, November 30, 2007 11:53 AM
> To: kaygopal@xxxxxxxxx; Hameed, Amir
> Cc: Oracle-L Freelists
>
> Subject: RE: ASSM - dynamic memory resizing
>
> Personally, I love it when ASSM forces the shared pool to 3x the size of
> the buffer cache, by taking memory _away_ from the buffer cache.
>
> That's fantastic.  Gotta love it.
>
> I know, I know. "Bind Variables".  Tell that to PeopleSoft who is Oracle
> :)
>
>
> Chris Taylor
> Sr. Oracle DBA
> Ingram Barge Company
> Nashville, TN 37205
> Office: 615-517-3355
> Cell: 615-354-4799
> Email: chris.taylor@xxxxxxxxxxxxxxx
>
> -----Original Message-----
> From: oracle-l-bounce@xxxxxxxxxxxxx
> [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of K Gopalakrishnan
> Sent: Friday, November 30, 2007 10:47 AM
> To: Amir.Hameed@xxxxxxxxx
> Cc: Oracle-L Freelists
> Subject: Re: ASSM - dynamic memory resizing
>
> Amir,
>
> The frequency depends on the memory pressure. I am not aware whether
> there are any fixed  intervals , where MMAN checks the memory
> allocations. However you can trace the operations using
> "_memory_management_tracing".
>
> -Gopal
>
>
> On Nov 30, 2007 8:50 AM, Hameed, Amir <Amir.Hameed@xxxxxxxxx> wrote:
> > Folks,
> > Does anyone know what process does the dynamic memory resizing when
> ASSM
> > is enabled? Also, what is the frequency of this operation or is it
> > triggered by some event? From the v$sga_dynamic
> > _components.last_oper_time, this does not seem to be triggered at
> fixed
> > time intervals.
> >
> > Thanks
> > Amir
> >
> > --
> > http://www.freelists.org/webpage/oracle-l
> >
> >
> >
>
>
>
> --
> Best Regards,
> K Gopalakrishnan
> Co-Author: Oracle Wait Interface, Oracle Press 2004
> http://www.amazon.com/exec/obidos/tg/detail/-/007222729X/
>
> Author: Oracle Database 10g RAC Handbook, Oracle Press 2006
> http://www.amazon.com/gp/product/007146509X/
> --
> http://www.freelists.org/webpage/oracle-l
>
>
>
>
>



-- 
Best Regards,
K Gopalakrishnan
Co-Author: Oracle Wait Interface, Oracle Press 2004
http://www.amazon.com/exec/obidos/tg/detail/-/007222729X/

Author: Oracle Database 10g RAC Handbook, Oracle Press 2006
http://www.amazon.com/gp/product/007146509X/
--
http://www.freelists.org/webpage/oracle-l

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