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Message from discussion Oracle 10g on Windows 2003 x64 Memory Useage
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hjr.pyth...@gmail.com  
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 More options Aug 10 2007, 3:00 am
Newsgroups: comp.databases.oracle.server
From: hjr.pyth...@gmail.com
Date: Fri, 10 Aug 2007 00:00:59 -0700
Local: Fri, Aug 10 2007 3:00 am
Subject: Re: Oracle 10g on Windows 2003 x64 Memory Useage
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On Aug 3, 9:09 pm, Charles Hooper <hooperc2...@yahoo.com> wrote:

> On Aug 2, 9:22 am, sev...@kcpweb.net wrote:

> > Hi All,

> > We are running Oracle 10g on a Quad Dual Core Windows 2003 x64
> > Enterprise Server with 16GB of memory.  I notice that the Oracle
> > process is only using 4.6 GB of Physical RAM and 10GB of Virtual
> > memory.  Performance monitor is showing that the server has 8GB
> > Physical Memory free.  This seems like oracle isn't using the free
> > memory very efficiently and swapping a lot out to disk, is this
> > something that can be tuned to boost performance or is it dynamically
> > performed by the Oracle process?

> > Thanks for your help, I'm new to Oracle having worked mainly with MS
> > SQL so go easy on me,

> > Regards,

> > Stephen

> Have you enabled large page support on Windows and Oracle, which
> causes Windows to use 4MB memory page sizes rather than 4KB memory
> pages?  If so, I suspect that Performance Monitor is showing incorrect
> information.  I am running Oracle 10.2.0.2 on Windows 2003 x64, total
> page file size for all drives is configured at 3124MB, yet Task
> Manager reports that PF usage is 13.3GB.  In my case, system
> performance is great, so I am not too concerned about the inconsistent
> numbers.

> Have you verified that the page file is actually 10GB in size?

> Charles Hooper
> IT Manager/Oracle DBA
> K&M Machine-Fabricating, Inc.

Apart from that useful bit of advice, be warned that 64-bit Oracle on
64-bit Windows 2003 that runs on AMD processors will experience a
massive performance hit as memory starts paging maniacally once total
memory consumption hits about 12.8GB. It's a known bug, there's a TAR
out on it, it's allegedly fixed in 10.2.0.3 (not yet tested, however),
and it only affects AMD processor platforms.

Might not have any relevance to the OP, but I thought I'd mention it
just in case...


 
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