Oracle archive log compression

Dear All,
Please help me how I compress oracle archive log in 10g.
Thanks,
Manas

manas wrote:
Dear All,
Please help me how I compress oracle archive log in 10g.
Thanks,
ManasUse RMAN by Compressed option (or) with Compressed and delete input option
RMAN> backup as compressed backupset archivelog all;
Starting backup at 23-FEB-12
current log archived
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=72 device type=DISK
channel ORA_DISK_1: starting compressed archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=16 RECID=11 STAMP=775778430
input archived log thread=1 sequence=17 RECID=12 STAMP=775819218
input archived log thread=1 sequence=18 RECID=13 STAMP=775835555
input archived log thread=1 sequence=19 RECID=14 STAMP=775835555
channel ORA_DISK_1: starting piece 1 at 23-FEB-12
channel ORA_DISK_1: finished piece 1 at 23-FEB-12
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\BACKUPSET\2012_02_23\O1_MF_ANNNN_TAG20120223T115447_7NCPXJBF_.BKP tag=TAG20120223T115447 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting compressed archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=1 RECID=15 STAMP=775847193
input archived log thread=1 sequence=2 RECID=16 STAMP=775847245
input archived log thread=1 sequence=3 RECID=17 STAMP=775847246
input archived log thread=1 sequence=4 RECID=18 STAMP=775864847
input archived log thread=1 sequence=5 RECID=19 STAMP=775906825
input archived log thread=1 sequence=6 RECID=20 STAMP=775906906
input archived log thread=1 sequence=7 RECID=21 STAMP=776001285
channel ORA_DISK_1: starting piece 1 at 23-FEB-12
channel ORA_DISK_1: finished piece 1 at 23-FEB-12
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\BACKUPSET\2012_02_23\O1_MF_ANNNN_TAG20120223T115447_7NCPXQS2_.BKP tag=TAG20120223T115447 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:07
Finished backup at 23-FEB-12
Starting Control File and SPFILE Autobackup at 23-FEB-12
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\AUTOBACKUP\2012_02_23\O1_MF_S_776001303_7NCPY044_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 23-FEB-12
RMAN>
=====================
RMAN> backup as compressed backupset archivelog all delete input;
Starting backup at 23-FEB-12
current log archived
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=9 device type=DISK
channel ORA_DISK_1: starting compressed archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=16 RECID=11 STAMP=775778430
input archived log thread=1 sequence=17 RECID=12 STAMP=775819218
input archived log thread=1 sequence=18 RECID=13 STAMP=775835555
input archived log thread=1 sequence=19 RECID=14 STAMP=775835555
channel ORA_DISK_1: starting piece 1 at 23-FEB-12
channel ORA_DISK_1: finished piece 1 at 23-FEB-12
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\BACKUPSET\2012_02_23\O1_MF_ANNNN_TAG20120223T115645_7NCQ15OV_.BKP tag=TAG20120223T115645 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:08
channel ORA_DISK_1: deleting archived log(s)
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_20\O1_MF_1_16_7N4X928H_.ARC RECID=11 STAMP=775778430
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_21\O1_MF_1_17_7N653S9L_.ARC RECID=12 STAMP=775819218
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_21\O1_MF_1_18_7N6MQBWS_.ARC RECID=13 STAMP=775835555
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_21\O1_MF_1_19_7N6NXV4M_.ARC RECID=14 STAMP=775835555
channel ORA_DISK_1: starting compressed archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=1 RECID=15 STAMP=775847193
input archived log thread=1 sequence=2 RECID=16 STAMP=775847245
input archived log thread=1 sequence=3 RECID=17 STAMP=775847246
input archived log thread=1 sequence=4 RECID=18 STAMP=775864847
input archived log thread=1 sequence=5 RECID=19 STAMP=775906825
input archived log thread=1 sequence=6 RECID=20 STAMP=775906906
input archived log thread=1 sequence=7 RECID=21 STAMP=776001285
input archived log thread=1 sequence=8 RECID=22 STAMP=776001403
channel ORA_DISK_1: starting piece 1 at 23-FEB-12
channel ORA_DISK_1: finished piece 1 at 23-FEB-12
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\BACKUPSET\2012_02_23\O1_MF_ANNNN_TAG20120223T115645_7NCQ1GLP_.BKP tag=TAG20120223T115645 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:08
channel ORA_DISK_1: deleting archived log(s)
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_21\O1_MF_1_1_7N70G0F6_.ARC RECID=15 STAMP=775847193
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_21\O1_MF_1_2_7N70HOHF_.ARC RECID=16 STAMP=775847245
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_21\O1_MF_1_3_7N70HP3O_.ARC RECID=17 STAMP=775847246
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_21\O1_MF_1_4_7N7KONB8_.ARC RECID=18 STAMP=775864847
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_22\O1_MF_1_5_7N8TOK3Q_.ARC RECID=19 STAMP=775906825
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_22\O1_MF_1_6_7N8TR2S1_.ARC RECID=20 STAMP=775906906
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_23\O1_MF_1_7_7NCPXCKL_.ARC RECID=21 STAMP=776001285
archived log file name=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_02_23\O1_MF_1_8_7NCQ13VV_.ARC RECID=22 STAMP=776001403
Finished backup at 23-FEB-12
Starting Control File and SPFILE Autobackup at 23-FEB-12
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORCL\AUTOBACKUP\2012_02_23\O1_MF_S_776001423_7NCQ1RFZ_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 23-FEB-12
RMAN>Edited by: CKPT on Feb 23, 2012 11:57 AM

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Hi
There is a feature that allows us to compress archive logs. This is set using "ALTER DATABASE ARCHIVELOG COMPRESS enable;"
What I need to know is
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2) Has anyone experienced any drawbacks using this.
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This is what I got back from ORACLE.
Generic Note
Hi,
The archive log compression feature was withdrawn from the release before the oracle 10g production release.
It may appear to function as expected, but it is not yet supported and is intentionally not documented.
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Hi;
You have to login https://support.oracle.com/CSP/ui/flash.html and you have to CSI account.
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am_73798 wrote:
Hi All,
I have a question regarding oracle archive log configuration .
My DB is : Ora10gR2
Unix : HPUX
To support Data guard functionality DBA has put DB in ARCHIVE LOG mode with forced logging mode =YES.
1* select LOG_MODE,FORCE_LOGGING from v$database
SQL> /
LOG_MODE FORCE_LOGGING
ARCHIVELOG YES
Now i have a table called PARAMETER where i need to load aroung 700 Million records . Since DB is in forced logging mode this will create lot of log information and that will take long time to load as well.
Is thr any option to keep a table in nologging mode , even if the DB is in forced logging mode ??
ThanksHi,
No there is no option to keep a table in nologging mode if DB is in force logging.
Regards
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AliD wrote:
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Hello;
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user640800 wrote:
Hi everybody,
I have installed Oracle 10g on my Windows XP Pro SP3 in archivelog mode.
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>
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Hi,
I would like to know the archive log mode in oracle 10g and I use this code in SQLPlus
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Hi Paul
Because I am a newbie in DBA Oracle so I got many difficulties.
You are very kind to help me.
So I have some more questions:
1. when I executed this code, it always reported error:
$ tmp=`${ORACLE_HOME}/bin/sqlplus -s / as sysdba << EOF
set heading off feedback off;
exit
EOF`
tmp='ERROR:
ORA-01031: insufficient privileges
SP2-0306: Invalid option.
Usage: CONN[ECT] [logon] [AS {SYSDBA|SYSOPER}]
where <logon> ::= <username>[<password>][@<connect_identifier>] | /
SP2-0306: Invalid option.
Usage: CONN[ECT] [logon] [AS {SYSDBA|SYSOPER}]
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2. With Paul's guide:
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Unix report as following: Linux error: 13: Permission denied.
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Please guilde more detail.
Thanks for your attention.
Message was edited by:
user481034

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>
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Sat Jan 1 14:42:57 2011
Thread 1 advanced to log sequence 9465 (LGWR switch)
Current log# 2 seq# 9465 mem# 0: /u01/oradata/TNORA3/redo02a.log
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Current log# 3 seq# 9466 mem# 0: /u01/oradata/TNORA3/redo03a.log
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Sat Jan 1 14:48:50 2011
Thread 1 advanced to log sequence 9467 (LGWR switch)
Current log# 1 seq# 9467 mem# 0: /u01/oradata/TNORA3/redo01a.log
Current log# 1 seq# 9467 mem# 1: /u02/oradata/TNORA3/redo01b.log
Sat Jan 1 14:52:11 2011
Thread 1 advanced to log sequence 9468 (LGWR switch)
Current log# 2 seq# 9468 mem# 0: /u01/oradata/TNORA3/redo02a.log
Current log# 2 seq# 9468 mem# 1: /u02/oradata/TNORA3/redo02b.log
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Current log# 2 seq# 9471 mem# 0: /u01/oradata/TNORA3/redo02a.log
Current log# 2 seq# 9471 mem# 1: /u02/oradata/TNORA3/redo02b.log
Sat Jan 1 15:05:16 2011
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Current log# 3 seq# 9472 mem# 1: /u02/oradata/TNORA3/redo03b.log
Sat Jan 1 15:08:30 2011
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Current log# 1 seq# 9473 mem# 1: /u02/oradata/TNORA3/redo01b.log
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Current log# 1 seq# 9473 mem# 0: /u01/oradata/TNORA3/redo01a.log
Current log# 1 seq# 9473 mem# 1: /u02/oradata/TNORA3/redo01b.log
Sat Jan 1 15:11:14 2011
Thread 1 advanced to log sequence 9474 (LGWR switch)
Current log# 2 seq# 9474 mem# 0: /u01/oradata/TNORA3/redo02a.log
Current log# 2 seq# 9474 mem# 1: /u02/oradata/TNORA3/redo02b.log
Sat Jan 1 15:14:15 2011
Thread 1 advanced to log sequence 9475 (LGWR switch)
Current log# 3 seq# 9475 mem# 0: /u01/oradata/TNORA3/redo03a.log
Current log# 3 seq# 9475 mem# 1: /u02/oradata/TNORA3/redo03b.log
>
PLs, help me.

This is the contait of tail -100 /opt/app/oracle/admin/TNORA3/bdump/tnora_s008_17165.trc | more
KCBS: Tot bufs in set segwise
KCBS: nbseg[0] is 1568
KCBS: nbseg[1] is 1568
KCBS: nbseg[2] is 1569
KCBS: nbseg[3] is 1568
KCBS: nbseg[4] is 1568
KCBS: nbseg[5] is 1568
KCBS: nbseg[6] is 1569
KCBS: nbseg[7] is 1568
KCBS: nbseg[8] is 1568
KCBS: nbseg[9] is 1568
KCBS: nbseg[10] is 1569
KCBS: nbseg[11] is 1568
KCBS: nbseg[12] is 1568
KCBS: nbseg[13] is 1568
KCBS: nbseg[14] is 1569
KCBS: nbseg[15] is 1568
KCBS: nbseg[16] is 1568
KCBS: nbseg[17] is 1568
KCBS: nbseg[18] is 1569
KCBS: nbseg[19] is 1568
KCBS: Act cnt = 15713
KCBS: bufcnt = 31365, nb_kcbsds = 31365
KCBS: fbufcnt = 445
KCBS: Tot bufs in set segwise
KCBS: nbseg[0] is 1568
KCBS: nbseg[1] is 1568
KCBS: nbseg[2] is 1569
KCBS: nbseg[3] is 1568
KCBS: nbseg[4] is 1568
KCBS: nbseg[5] is 1568
KCBS: nbseg[6] is 1569
KCBS: nbseg[7] is 1568
KCBS: nbseg[8] is 1568
KCBS: nbseg[9] is 1568
KCBS: nbseg[10] is 1569
KCBS: nbseg[11] is 1568
KCBS: nbseg[12] is 1568
KCBS: nbseg[13] is 1568
KCBS: nbseg[14] is 1569
KCBS: nbseg[15] is 1568
KCBS: nbseg[16] is 1568
KCBS: nbseg[17] is 1568
KCBS: nbseg[18] is 1569
KCBS: nbseg[19] is 1568
KCBS: Act cnt = 15713
KCBS: bufcnt = 31365, nb_kcbsds = 31365
KCBS: fbufcnt = 445
KCBS: Tot bufs in set segwise
KCBS: nbseg[0] is 1568
KCBS: nbseg[1] is 1568
KCBS: nbseg[2] is 1568
KCBS: nbseg[3] is 1569
KCBS: nbseg[4] is 1568
KCBS: nbseg[5] is 1568
KCBS: nbseg[6] is 1568
KCBS: nbseg[7] is 1569
KCBS: nbseg[8] is 1568
KCBS: nbseg[9] is 1568
KCBS: nbseg[10] is 1568
KCBS: nbseg[11] is 1569
KCBS: nbseg[12] is 1568
KCBS: nbseg[13] is 1568
KCBS: nbseg[14] is 1568
KCBS: nbseg[15] is 1569
KCBS: nbseg[16] is 1568
KCBS: nbseg[17] is 1568
KCBS: nbseg[18] is 1568
KCBS: nbseg[19] is 1569
KCBS: Act cnt = 15713
KCBS: bufcnt = 31365, nb_kcbsds = 31365
KCBS: fbufcnt = 444
KCBS: Tot bufs in set segwise
KCBS: nbseg[0] is 1568
KCBS: nbseg[1] is 1568
KCBS: nbseg[2] is 1568
KCBS: nbseg[3] is 1569
KCBS: nbseg[4] is 1568
KCBS: nbseg[5] is 1568
KCBS: nbseg[6] is 1568
KCBS: nbseg[7] is 1569
KCBS: nbseg[8] is 1568
KCBS: nbseg[9] is 1568
KCBS: nbseg[10] is 1568
KCBS: nbseg[11] is 1569
KCBS: nbseg[12] is 1568
KCBS: nbseg[13] is 1568
KCBS: nbseg[14] is 1568
KCBS: nbseg[15] is 1569
KCBS: nbseg[16] is 1568
KCBS: nbseg[17] is 1568
KCBS: nbseg[18] is 1568
KCBS: nbseg[19] is 1569
KCBS: Act cnt = 15713
KSOLS: Begin dumping all object level stats elements
KSOLS: Done dumping all elements. Exiting.
Dump event group for SESSION
Unable to dump event group - no SESSION state objectDump event group for SYSTEM
ssexhd: crashing the process...
Shadow_Core_Dump = partial

Managing ARCHIVE Logs in Oracle 10.2.0.3

I am working with a customer who seems to think there is a way of controling the database other than a custom JOB, script or RMAN in how it creates, manages and deletes its archive logs while running in archivelog mode. He wants the database to automatically delete obsolete archive logs. He also wants to control the duration in time between each time an archive log is written in order to stop the growth of archive logs and filling up disk space.
I am saying this is not possible. You either configure RMAN to delete the obsolete or expired archive logs based on your retention policy or do it manually in the Enterprise Manager or Grid Control Console by deletenig obsolete or expired logs.
Am I correct or am I off base here?

4.1.3 Sizing Redo Log Files
The size of the redo log files can influence performance, because the behavior of the database writer and archiver processes depend on the redo log sizes. Generally, larger redo log files provide better performance. Undersized log files increase checkpoint activity and reduce performance.
Although the size of the redo log files does not affect LGWR performance, it can affect DBWR and checkpoint behavior. Checkpoint frequency is affected by several factors, including log file size and the setting of the FAST_START_MTTR_TARGET initialization parameter. If the FAST_START_MTTR_TARGET parameter is set to limit the instance recovery time, Oracle automatically tries to checkpoint as frequently as necessary. Under this condition, the size of the log files should be large enough to avoid additional checkpointing due to under sized log files. The optimal size can be obtained by querying the OPTIMAL_LOGFILE_SIZE column from the V$INSTANCE_RECOVERY view. You can also obtain sizing advice on the Redo Log Groups page of Oracle Enterprise Manager Database Control.
It may not always be possible to provide a specific size recommendation for redo log files, but redo log files in the range of a hundred megabytes to a few gigabytes are considered reasonable. Size your online redo log files according to the amount of redo your system generates. A rough guide is to switch logs at most once every twenty minutes.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/build_db.htm#sthref237
If you are talking about data guard then:
4.1.3 Sizing Redo Log Files
The size of the redo log files can influence performance, because the behavior of the database writer and archiver processes depend on the redo log sizes. Generally, larger redo log files provide better performance. Undersized log files increase checkpoint activity and reduce performance.
Although the size of the redo log files does not affect LGWR performance, it can affect DBWR and checkpoint behavior. Checkpoint frequency is affected by several factors, including log file size and the setting of the FAST_START_MTTR_TARGET initialization parameter. If the FAST_START_MTTR_TARGET parameter is set to limit the instance recovery time, Oracle automatically tries to checkpoint as frequently as necessary. Under this condition, the size of the log files should be large enough to avoid additional checkpointing due to under sized log files. The optimal size can be obtained by querying the OPTIMAL_LOGFILE_SIZE column from the V$INSTANCE_RECOVERY view. You can also obtain sizing advice on the Redo Log Groups page of Oracle Enterprise Manager Database Control.
It may not always be possible to provide a specific size recommendation for redo log files, but redo log files in the range of a hundred megabytes to a few gigabytes are considered reasonable. Size your online redo log files according to the amount of redo your system generates. A rough guide is to switch logs at most once every twenty minutes.
Automatic Deletion of Applied Archive Logs
Archived logs, once they are applied on the logical standby database, will be automatically deleted by SQL Apply.
This feature reduces storage consumption on the logical standby database and improves Data Guard manageability.
See also:
Oracle Data Guard Concepts and Administration for details
http://download.oracle.com/docs/cd/B19306_01/server.102/b14214/chapter1.htm#sthref269

Putting a Oracle RAC in to archive log mode??

Our RAC is a 10gR2 Three(3) node RAC with a SAN as the shared storage. cluster is installed on linux. at the moment the RAC is in noarchieve log mode.
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination /u01/app/oracle/product/10.2.
0/db_1/dbs/arch
Oldest online log sequence 665
Current log sequence 666
we created raw partitions in SAN and use ASM to manage shared storage.
when running DBCA at "specify locations for the database files to be created" step we selected "use oracle managed files" and gave database area = +DATA/
then at choose the recovery options for the database" step we ticked specify flash recovery area and gave Flash Recovery AREA = +BACKUP/ and flash recovery area = 10240 MB. we didnt click "enable archiving" option. hence the RAC DB is in NOARCHIEVELOG mode.
i found some guide to put RAC in archive log mode which i have given below....
ALTER SYSTEM SET log_archive_start=TRUE SCOPE=spfile;
ALTER SYSTEM SET log_archive_dest_1='location=/u01/oradata/MYSID/archive/' SCOPE=spfile;
ALTER SYSTEM SET log_archive_format='arch_%t_%s.arc' SCOPE=spfile;
Since we need to mount the database in exclusive mode we must also alter the following parameter:
ALTER SYSTEM SET cluster_database=FALSE SCOPE=spfile;
From the command line we can stop the entire cluster using:
srvctl stop database -d MYSID
With the cluster down we can connect to a single node and issue the following commands:
STARTUP MOUNT;
ARCHIVE LOG START;
ALTER DATABASE ARCHIVELOG;
ALTER SYSTEM SET cluster_database=TRUE SCOPE=spfile;
SHUTDOWN IMMEDIATE;
Notice that the CLUSTER_DATABASE parameter has been reset to it's original value. Since the datafiles and spfile are shared between all instances this operation only has to be done from a single node.
From the command line we can now start the cluster again using:
srvctl start database -d MYSID
my main question is about the setting of
ALTER SYSTEM SET log_archive_dest_1='location= ????? ' SCOPE=spfile;
since i have set +BACKUP/ as the FRA during installation how should i define the location of log_archive_dest_1???
many thanks in advance.
regards
Dilan

many thanks for the replies
will the command you posted send the archive logs to the "+BACKUP/" location in my SAN.
if yes how does oracle know that USE_DB_RECOVERY_FILE_DEST = BACKUP/ in my SAN. or how do i set oracle to use BACKUP/ as the USE_DB_RECOVERY_FILE_DEST??
im a newbie to RAC so pls bear with me. also at the moment i get the following outputs from my database.... pls note the bold part below, is the archive destination pointing to a location in my local server?
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination /u01/app/oracle/product/10.2.0/db_1/dbs/arch
Oldest online log sequence 665
Current log sequence 666
SQL> show parameter db_recovery;
NAME TYPE VALUE
db_recovery_file_dest string
db_recovery_file_dest_size big integer 0
SQL> show parameter archive
NAME TYPE VALUE
archive_lag_target integer 0
log_archive_config string
log_archive_dest string
log_archive_dest_1 string
log_archive_dest_10 string
log_archive_dest_2 string
log_archive_dest_3 string
log_archive_dest_4 string
log_archive_dest_5 string
log_archive_dest_6 string
log_archive_dest_7 string
NAME TYPE VALUE
log_archive_dest_8 string
log_archive_dest_9 string
log_archive_dest_state_1 string enable
log_archive_dest_state_10 string enable
log_archive_dest_state_2 string enable
log_archive_dest_state_3 string enable
log_archive_dest_state_4 string enable
log_archive_dest_state_5 string enable
log_archive_dest_state_6 string enable
log_archive_dest_state_7 string enable
log_archive_dest_state_8 string enable
NAME TYPE VALUE
log_archive_dest_state_9 string enable
log_archive_duplex_dest string
log_archive_format string %t_%s_%r.dbf
log_archive_local_first boolean TRUE
log_archive_max_processes integer 2
log_archive_min_succeed_dest integer 1
log_archive_start boolean FALSE
log_archive_trace integer 0
remote_archive_enable string true
standby_archive_dest string ?/dbs/arch

Oracle 10g - switch off archive logs

Hi,
I understand in oracle 10g, the following parameter is not longer available:
LOG_ARCHIVE_START=FALSE
Can i confirm that for now, only way to disable archive log is to execute the following command when in mount stage:
alter database noarchivelog;
There's not other parameter we can specify in pfile to disable it permantely?
thanks

You are correct. No other parameters.

Oracle Restore from Online backup without any archive logs

Hi,
May be a dumb question. If I have a good online backup (say it took 2 hours to do that. And there is database activity while backup is going on), and lost all the archive logs happened after the online backup, is it possible at all to do the restore using that backup? complete or incomplete? and bring back the database to normal operation mode? Some details on this.
Thanks.

Let us see the reasoning behind this.
Database:WORLDDB
WORLDDB configuration:-
TBSP_WDB
->TBSP_WDB_01.dbf
->TBSP_WDB_02.dbf
SYSTEM
->SYSTEM.dbf
USERS
and so on for the tablespaces.
CASE 1:-
User managed backup.
You issue
ALTER TABLESPACE TBSP_WDB BEGIN BACKUP;
DB keeps working all transactions are recorded in the redo stream, the scn information is not updated in the file header.
Also note that the other tablespaces were been continuously worked on hence their scn numbers are a moving target.
http://download-east.oracle.com/docs/cd/B10501_01/server.920/a96572/osbackups.htm#10012
So if you begin tablespace TBSP_WDB backup at time t1 and by the time you are done with your backups you are at time t2, you will need all of the archive log's between time t1 and t2.
CASE 2:-
If we do with rman, rman takes care of the file header update information and goes on its merry way, those details are hidden from the end user. If one of the tablespace is fractured, updated while backups are going on , rman knows about it and will re-read the affected blocks in question.
My thinking would be that you might need archive logs, unless it is a cold backup, with switch logfiles in between.
If you do hot backups you need archivelogs is my thought. The number of archivelogs required will be decreased considerably through rman.
http://download-east.oracle.com/docs/cd/B10501_01/server.920/a96566/rcmconc1.htm#458821
Summary:-
Either way archivelogs are needed.

Oracle archive log compression

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