Question about frequent log switches

I support an Oracle 10g database (10.2.0.4) and database activity has increase to the point that, during the heaviest parts of the day, log switches are occurring too frequently (15 - 20 times per hour!). We also utilize Data Guard to replicate the database to our DR site. We currently have 2 log groups with 2 membes in each group.
I understand that I can tackle this issue 2 ways: either to increase the size of my redo log files (they are currently at 50 Meg each), or I can add additional redo log groups to the database.
I would like to get some opinions on whether on solution is better than the other, or the pros and cons of each course of action.
Thank you in advance for your advice with my question!

CowTown_dba wrote:
Thanks for helping me to understand my true problem. The issue is that because of the frequent log switches, database performance is degrading.Maybe that's the cause, maybe it isn't.
Users are complaining about slow response. So if I add more groups it will buy the archiver extra time but it will not help with the slow response issue.Depends on the root cause of the slow response issue. That has yet to be determined. While it may be true that your car has a short in the electrical system and your car doesn't start, it doesn't necessarily follow that the car doesn't start because of the short in the electrical system.
>
I really appreciate everyone contributing to my understanding of the issue, and helping clarify the root problem so that I can fix it the first time around.
You guys rock!

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I have just joined this helpful community. Since I am still a newbie, it is my hope to comprehend through our discussions. I would like to ask few questions about 3750X stack switch:
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Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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Thats not what I expected. Where is my mistake?

Hi,
I do new tests it's very strange.
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You can open a SR on MOS. (to check bugs)
I reproduce the same test and the result was the same, it seems that this is a bug.
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input archived log thread=2 sequence=20 RECID=17 STAMP=747753714
input archived log thread=1 sequence=16 RECID=19 STAMP=747753729
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archived log file name=+DATA/orcl/archivelog/2011_04_06/thread_2_seq_20.295.747753715 RECID=17 STAMP=747753714
archived log file name=+DATA/orcl/archivelog/2011_04_06/thread_1_seq_16.294.747753729 RECID=19 STAMP=747753729
archived log file name=+DATA/orcl/archivelog/2011_04_06/thread_2_seq_21.298.747753729 RECID=18 STAMP=747753729
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RMAN> list archivelog all;
specification does not match any archived log in the repositoryOracle Docs Says:
The BACKUP ARCHIVELOG ... DELETE INPUT command deletes archived log files after they are backed up.
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With DELETE INPUT, RMAN deletes only the specific copy of the archived log chosen for the backup set.
With DELETE ALL INPUT, RMAN deletes each backed-up archived redo log file from all log archiving destinations.
As explained in "Configuring an Archived Redo Log Deletion Policy",
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up at least twice to tape, then BACKUP ... DELETE honors this policy.http://download.oracle.com/docs/cd/E11882_01/backup.112/e10642/rcmbckba.htm#BRADV89524
But in ours case it's not honors this policy.
Only with the FORCE command should this happen. But it is not our case.
Oracle Docs:
If FORCE is not specified on the deletion commands,
then these deletion commands obey the archived log deletion policy.
If FORCE is specified, then the deletion commands ignore the archived log deletion policy.http://download.oracle.com/docs/cd/E11882_01/backup.112/e10643/rcmsynta010.htm#RCMRF113
Alternatively you can do the following:
Set the commands separately.
Check this:
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2> backup archivelog all not backed up 2 times ;
3> delete archivelog all backed up 2 times to disk;
4> }
Starting backup at 06-APR-11
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=2 sequence=22 RECID=21 STAMP=747755128
input archived log thread=1 sequence=17 RECID=20 STAMP=747755127
channel ORA_DISK_1: starting piece 1 at 06-APR-11
channel ORA_DISK_1: finished piece 1 at 06-APR-11
piece handle=+DATA/orcl/backupset/2011_04_06/annnf0_tag20110406t134528_0.295.747755129 tag=TAG20110406T134528 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 06-APR-11
released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=78 instance=orcl1 device type=DISK
RMAN-08138: WARNING: archived log not deleted - must create more backups
archived log file name=+DATA/orcl/archivelog/2011_04_06/thread_1_seq_17.298.747755127 thread=1 sequence=17
RMAN-08138: WARNING: archived log not deleted - must create more backups
archived log file name=+DATA/orcl/archivelog/2011_04_06/thread_2_seq_22.294.747755129 thread=2 sequence=22
RMAN>Edited by: Levi Pereira on Apr 6, 2011 1:35 PM

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Message was edited by:
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