Re: How windows manage memory: oracle

From: Tanel Poder <tanel.poder.003_at_mail.ee>
Date: Thu, 04 Dec 2003 12:49:26 -0800
Message-ID: <F001.005D8CF6.20031204124926@fatcity.com>

Even though I have never touched VMS myself, I completely agree that it is (was) a great operating system, I've just heard so many good words from respectable sources about it :)

About Windows, probably the initial idea was great but since MS is a marketing driven company, they just left off most of the good pieces in order to release "new" versions sooner...

Tanel.

Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Thursday, December 04, 2003 10:19 PM

> That is utterly disgusting memory management. When I come to think
> of it, there was a guy named David Cutler who was promising that Windows
> will have the same virtual memory system as VMS, with FREELIM,FREEGOAL,
> BORROWLIM, GROWLIM and MPW_ parameters. Working sets are also gone as
> well as the most elaborate privileges system until that time. Authorize
> was a wonderful tool which still leaves anything that either windows or
> Unix can offer in the dust.
> On 12/04/2003 02:54:31 PM, Tanel Poder wrote:
> > > SGA is 970M and PGA(maxsize) is 40M. Connection is 20.But from
task
> > manager, Oracle is using 1005M physical Memory and 1013M virtual
memory(you
> > can view the data from here:
> > >

http://www.cnoug.org/html/ut/attach/2003/12/04/12516-oramem2-embed.gif).
> >
> > Physical memory and virtual memory overlap in windows.
> >
> > If you have allocated 100M of memory, but only 50M of it is mapped to
> > physical memory (rest is in pagefile), you see 100M and 50M accordingly
in
> > task manager.
> >
> > Also, there is a situation where you can have more physical memory than
> > virtual memory. Im not sure, but it might be doing something with
> > deallocated memory, which is not reclaimed by OS or smth like that.
There is
> > a note about windows nt memory management in metalink, search from there
if
> > want additional information.
> >
> > Tanel.
> >
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > --
> > Author: Tanel Poder
> > INET: tanel.poder.003_at_mail.ee
> >
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> Mladen Gogala
> Oracle DBA

>
>
>

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> Author: Mladen Gogala
> INET: mladen_at_wangtrading.com

>


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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Tanel Poder
  INET: tanel.poder.003_at_mail.ee

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Received on Thu Dec 04 2003 - 14:49:26 CST