Re: How windows manage memory: oracle

Hi,

    But PGA is only 40M(This is the sum of all process's v$sesstat).     So there is more memory utilization then oracle actually should use.     From task manager, it is 2018(Physical+Virtual), But from oracle v$(sga + pga) it is only 1020M.This is the problem.

Zhu Chao.

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Thursday, December 04, 2003 9:59 PM

> I do not see the problem.
> SGA is 970M + PGA (20*40) 800 MB + executables and you got about 2GB which
> is the upper limit on NT, unless you used special startup parameter.
>
> Yechiel Adar
> Mehish
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: Thursday, December 04, 2003 3:24 PM
>
>
> > Hi, friends:
> > Several months ago there is a thread talking about choosing the proper
> memory size for windows server running oracle.
> > And today I logon to one of my small oracle on NT and found something
> I cannot understand. It is a small application running Oracle 817/win2k.
> > 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).
> >
> >
> >
> > SQL> show sga
> >
> >
> >
> > Total System Global Area 971040796 bytes
> >
> > Fixed Size 75804 bytes
> >
> > Variable Size 299798528 bytes
> >
> > Database Buffers 671088640 bytes
> >
> > Redo Buffers 77824 byte
> >
> > SQL> select count(*) from v$session;
> >
> >
> >
> > COUNT(*)
> >
> > ----------
> >
> > 18
> >
> > SQL> select sum(value) from v$sesstat where statistic#=(select statistic#
> from v$statname where name='session pga memory max');
> >
> >
> >
> > SUM(VALUE)
> >
> > ----------
> >
> > 39526196
> >
> > And I looked at another server running SAP/oracle, get similiar data:
> >
> > http://www.cnoug.org/html/ut/attach/2003/12/04/12518-sap-embed.gif
> >
> > (780M sga,33 connection and 25M pga).
> >
> >
> >
> > Can someone explain it?
> >
> >
> >
> > Regards
> >
> >
> >
> > Zhu Chao.
> >
> >
> >
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > --
> > Author: zhu chao
> > INET: chao_ping_at_vip.163.com
> >
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Yechiel Adar
> INET: adar76_at_inter.net.il
>
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>

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: zhu chao
  INET: chao_ping_at_vip.163.com

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