Re: CPU Pegged at 100%

From: Thomas Day <tday6_at_csc.com>
Date: Mon, 29 Apr 2002 10:13:24 -0800
Message-ID: <F001.0045210D.20020429101324@fatcity.com>

The DBWRs are implemented as threads inside the ORACLE process (multi-threaded). This is beginning to sound like a Pern novel.

                                                                                           
                    "Bunyamin K.                                                           
                    Karadeniz"           To:     Multiple recipients of list ORACLE-L      
                    <bunyamink           <ORACLE-L_at_fatcity.com>                            
                    @havelsan.com        cc:                                               
                    .tr>                 Subject:     Re: CPU Pegged at 100%               
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                    04/29/2002                                                             
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     I have 5 DBWR processes according to INIT.ORA on  NT .. I see them on

V$SESSION but There is only one process ORACLE.EXE in the processes list of NT still.

     I do not understand the behaviour of ORacle on NT neither the Oracle I think.

Bunyamin K. Karadeniz
Oracle DBA / Developer
Civilian IT Department
Havelsan A.S. Eskisehir yolu
7.km Ankara Turkey
Phone: +90 312 2873565 / 1217
Mobile : +90 535 3357729

• Original Message ----- To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Sent: Monday, April 29, 2002 5:53 PM

> On Mon, Apr 29, 2002 at 05:59:18AM -0800, Thomas Day wrote:
> >
> > I don't think that increasing the db_writer_processes will help. NT
is,
as
> > noted elsewhere, multi-threaded. Increasing the db_writer_processes
will
> > not start a new process.
> >
> > My experience with Oracle on NT is that when the CPU is pegged at 100%
it
> > is because the OS is constantly writing and fetching the contents of
RAM
to
> > the swapfile.
> >
> --

>

> If this is the case for this problem, we have found that changing
> the location of the os paging file onto another disk and controller
> can help performance. See your windows clicking friends to find
> out where to click. It is somewhere under my computer...read
> the man page on it ;)
> ===============================================================
> Ray Stell stellr_at_vt.edu (540) 231-4109 KE4TJC 28^D
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Ray Stell
> INET: stellr_at_cns.vt.edu

>


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--
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Author: Bunyamin K. Karadeniz
  INET: bunyamink_at_havelsan.com.tr

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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Thomas Day
  INET: tday6_at_csc.com

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Received on Mon Apr 29 2002 - 13:13:24 CDT