RE: Rapid Log Switching

From: Weatherman, John <>
Date: Wed, 20 Feb 2008 15:26:55 -0600
Message-ID: <>

Didn't get this to the list...sorry...  

From: Weatherman, John
Sent: Wednesday, February 20, 2008 2:43 PM To: 'Bradd Piontek'
Subject: RE: Rapid Log Switching  

Our TARGETS are:  

archive_lag_target                   integer                          0

db_flashback_retention_target        integer                          360

fast_start_io_target                 integer                          0

fast_start_mttr_target               integer                          0

pga_aggregate_target                 big integer                      384M

sga_target                           big integer                      2G


From: Bradd Piontek [] Sent: Wednesday, February 20, 2008 2:38 PM To: Weatherman, John
Subject: Re: Rapid Log Switching  

What is fast_start_mttr_target set to?
Are you using Auto. memory management?

On Wed, Feb 20, 2008 at 1:58 PM, Weatherman, John
< <> > wrote:


I'm on RH 2.6.9-42.ELsmp x86_64 Linux, running <> . I've been having a lot of log issues for the last week. Thanks to some help here, I seem to have the worst of it under control now.  

However, last night I began seeing log switches every 6 minutes. The logs are 20M in size, but are switching between 2-6M. We do have log_checkpoint_timeout set, but it is 1800 seconds (30 minutes), not 6 minutes.  

Does anyone have any ideas what other than the timeout or the log filling up would cause a log switch? It's not manual and it's not backups, it's been too consistent and too long for either of those to make any sense. I'm not aware of anything else that should be triggering log switches and haven't been able to find anything suspicious with Google or Metalink.  

TIA,   John  

John P Weatherman

Sr Oracle DBA Desk: (615) 762-1376

Asurion, Inc                Mobile: (615) 517-2831




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Received on Wed Feb 20 2008 - 15:26:55 CST

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