Re: Physical Memory Fully Used and Swap is Not Used
Date: Tue, 23 Jun 2009 08:15:23 +0200
Message-ID: <8580d4110906222315s32900ecdi43712153d323ce19_at_mail.gmail.com>
Are you trying to tune or to understand memory? There is nothing here that would indicate a problem. If you use all you memory and no swap, then that would be optimal. It shows that your box is sized perfectly and you do not ned to use swap. Using swap reduces performance (if we compare to having enough memory and not needing swap).
If on the other hand you motivation is to understand why these numbers would be this way, then someone who has spent more time reading RDAs on Linux would need to answer here. To me the numbers would indicate that you have just barely reached the point where swap is starting to be used when more memory is needed.
Mathias
http://mathiasmagnusson.com http://blog.mathiasmagnusson.com http://photo.mathiasmagnusson.com http://oradbdev.mathiasmagnusson.com
On Tue, Jun 23, 2009 at 7:41 AM, Mudhalvan Moovarkku < moovarkku.mudhalvan_at_axa-direct.co.jp> wrote:
> Dear DBAs,
>
> We have recently migrated Oracle from 8.0.6 on HP-Unix to 10.2.0.4
> on Red Hat Linux
>
> Earlier the same application worked fine with 7GB RAM on HP-UNIX
> on PA-RISC
>
> Upgraded system on IBM X 3850 with 16GB RAM but still we have some
> performance issue.
>
> I knew there is some lagging because of Hardware Architecture but
> it is too bad 7 GB to 16GB RAM but still have performance.
>
> Please look at data collected from RDA. Looking at this scenario
> my physical memory is fullly used but Swap is not at all used.
>
> Total Physical Memory 16032 MiB
>
> Available Physical Memory 30 MiB
>
> Swap: Max Size 24575 MiB
>
> Swap: Available 24505 MiB
>
> Swap: In Use 70 MiB
>
> We know there is some performance issue in application. I would
> like to make as much as possible from Database/Linux side tunning to
> provide atlease peaceful performance. Can any body through some light on why
> the swap is not at all used.
>
> Regards
>
> Mudhalvan M.M
>
>
-- http://www.freelists.org/webpage/oracle-lReceived on Tue Jun 23 2009 - 01:15:23 CDT