RE: Log Switches in RAC

It is my understanding that the RDBMS does this so as to not allow an instance 
to lag too far behind. You should also check lag_archive_target to see if it's 
set. It's for the same purpose. 
 


From: Rajesh.Rao@xxxxxxxxxxxx
To: surachart@xxxxxxxxx
CC: oracle-l@xxxxxxxxxxxxx
Date: Tue, 10 Nov 2009 13:33:36 -0500
Subject: RE: Log Switches in RAC





Sorry, I mean, other than the alter system commands, Why and when would a log 
switch on one instance of a RAC trigger cause log switches to happen across one 
or more of the other instances?
 

From: Surachart Opun [mailto:surachart@xxxxxxxxx] 
Sent: Tuesday, November 10, 2009 1:24 PM
To: Rajesh Rao
Cc: oracle-l@xxxxxxxxxxxxx
Subject: Re: Log Switches in RAC
 
If you are meaning switch log by manual...

 


"alter system switch logfile"

This command switches log on that instance.

 

"alter system archive log current"

 

This command switches log all instance in RAC

 


Example:

SQL> alter system switch logfile;

 

System altered.

 

SQL> alter system archive log current;

 

System altered.

 

 

Good Luck
Surachart Opun
http://surachartopun.com



On Wed, Nov 11, 2009 at 1:11 AM, Rajesh Rao <Rajesh.Rao@xxxxxxxxxxxx> wrote:


 
Why and when would a log switch on one instance of a RAC trigger cause log 
switches to happen across one or more of the other instances?
 
Thanks
Raj
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