Re: Log switches

From: Tanel Põder <tanel.poder.003_at_mail.ee>
Date: Wed, 7 Jul 2004 18:03:23 +0300
Message-ID: <01df01c46433$8e170700$7ea423d5@porgand>

Hi!

Remember that every logswitch causes a checkpoint, so if you're switching logs very often, you'll have very agressive checkpointing, causing excessive IO and dbwr activity (also all datafiles' headers are updated during full checkpoint).

So I doubt that your system will perform well if you're switching logs every few seconds, but if you want to control this manually, you could set archive_lag_target to few seconds, causing a log switch after every given interval...

Tanel.

Original Message ----- From: "Raj Jamadagni" <rjamya_at_yahoo.com> To: <oracle-l_at_freelists.org> Sent: Wednesday, July 07, 2004 5:01 PM Subject: Log switches

> We are testing a streams based replication ... currently log switches
happen every minute, we
> would like to bring this down to few seconds (to have more instantaneous
data available). Is it
> possible? This is 9204 environment.
>
> TIA
> Raj
>
>
>
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Received on Wed Jul 07 2004 - 10:00:11 CDT