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Re: log buffer space

From: AK <oramagic_at_hotmail.com>
Date: Fri, 14 Mar 2003 14:34:01 -0800
Message-ID: <F001.0056AE05.20030314143401@fatcity.com>


log buffer is 320 K and log files are 30M approx. there are about 50 log switch /hr .

-ak

> AK,
>
> Could you provide the redo log sizes and the log_buffers parameters,
please.
> Also let us know the log switch frequency, too.
>
> Thanks.
>
> Arup
>
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: Friday, March 14, 2003 11:14 AM
>
>
> > Do you guys think , adding more log file can help ? I think it should
not
> ,
> > cuz any way logwriter is going to write in one datafile at a time ,
> correct
> > ?
> >
> > -ak
> >
> >
> > ----- Original Message -----
> > To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> > Sent: Friday, March 14, 2003 4:32 AM
> >
> >
> > > Arup:
> > >
> > > <NO FLAMES>
> > > The second condition is not quite true. It is 2/3 full in the current
> > > versions.
> > > </NO FLAMES>
> > >
> > > It is very easy to test with the event 10046^8.
> > >
> > > KG
> > >
> > >
> > > --- Arup Nanda <orarup_at_hotmail.com> wrote:
> > > > AK,
> > > >
> > > > If the log buffer is at least 4MB, then increasing it will not help,
> > > > rather it may hurt. The log buffer is flushed when any of the the
> > > > follwoing occur
> > > > (i) 1 MB is filled up
> > > > (2) 1/3rd is filled up
> > > > (3) every 3 seconds
> > > > (4) when a checkpoint occurs
> > > > (5) when a commit occurs.
> > > >
> > > > Therefore, see if any of these could be the problem. It's easy to
> > > > check #s 4 and 3.
> > > >
> > > > As Kirti suggested, the problem could be due to the redo logs being
> > > > on a busy disk, or even a slow one.
> > > >
> > > > HTH.
> > > >
> > > > Arup
> > > > ----- Original Message -----
> > > > From: Deshpande, Kirti
> > > > To: Multiple recipients of list ORACLE-L
> > > > Sent: Thursday, March 13, 2003 8:13 PM
> > > > Subject: RE: log buffer space
> > > >
> > > >
> > > > Increasing log_buffer size is an option, if it is really small.
> > > > I would also check if the redo logs are on a busy disk. If so, try
> > > > moving those (or other busy data files on the same disk) to other
> > > > not-so-busy disks.
> > > >
> > > > - Kirti
> > >
> > >
> > > =====
> > > Have a nice day !!
> > > ------------------------------------------------------------
> > > Best Regards,
> > > K Gopalakrishnan,
> > > Bangalore, INDIA.
> > > --
> > > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > > --
> > > Author: K Gopalakrishnan
> > > INET: kaygopal_at_yahoo.com
> > >
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> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > --
> > Author: AK
> > INET: oramagic_at_hotmail.com
> >
> > Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> > San Diego, California -- Mailing list and web hosting services
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Arup Nanda
> INET: orarup_at_hotmail.com
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> San Diego, California -- Mailing list and web hosting services
> ---------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
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>

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: AK
  INET: oramagic_at_hotmail.com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
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Received on Fri Mar 14 2003 - 16:34:01 CST

Original text of this message

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