Minimum size of SGA for the recovery catalog db ?

I've created a recovery catalog database and by default the total size of the SGA is 180MB. Problem is, there isnt' much memory on development server to run the target and recovery catalog database (catdb).
Would it be possible to startup catdb with an SGA of size 10 MB or so? What's the minimum size? I figured since catdb is only used as for the recovery catalog and would rarely be access or changed, it doesn't need to use that much memory.
Thanks in advance

Hi David,
In 10g, the minimal shared_pool_size is 120M, otherwise you will get
ORA-00371: not enough shared pool memory, should be atleast 123232153 bytes
You can set java_pool_size to 0, which is NOT the default.
You could also set the large_pool_size to 0, but I am not sure this is recommended.
In 8.0 shared_pool_size could be as low as 300K. Read your Reference manual for the values specifics to your version
HTH
Laurent Schneider
OCM DBA

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Pecification does not match any archive log in the recovery catalog

MAN> list archivelog all;
pecification does not match any archive log in the recovery catalog
RMAN> list backup of archivelog all
BS Key Size Device Type Elapsed Time Completion Time
671197 5.17M DISK 00:00:03 29-MAY-11
BP Key: 671200 Status: AVAILABLE Compressed: YES Tag: TAG20110529T180030
Piece Name: F:\OSSTDBY_BACKUP\ARCH\OSONDEMA_ARC_20110529_FVMDIGPU_S25087_P1
List of Archived Logs in backup set 671197
Thrd Seq Low SCN Low Time Next SCN Next Time
1 44836 503663671 29-MAY-11 503675934 29-MAY-11
2 22517 503663669 29-MAY-11 503675932 29-MAY-11
BS Key Size Device Type Elapsed Time Completion Time
671232 5.12M DISK 00:00:02 29-MAY-11
BP Key: 671235 Status: AVAILABLE Compressed: YES Tag: TAG20110529T200050
Piece Name: F:\OSSTDBY_BACKUP\ARCH\OSONDEMA_ARC_20110529_G1MDINRJ_S25089_P1
List of Archived Logs in backup set 671232
Thrd Seq Low SCN Low Time Next SCN Next Time
1 44837 503675934 29-MAY-11 503688661 29-MAY-11
2 22518 503675932 29-MAY-11 503688659 29-MAY-11
BS Key Size Device Type Elapsed Time Completion Time
671267 5.14M DISK 00:00:03 29-MAY-11
BP Key: 671270 Status: AVAILABLE Compressed: YES Tag: TAG20110529T220036
Piece Name: F:\OSSTDBY_BACKUP\ARCH\OSONDEMA_ARC_20110529_G3MDIUS4_S25091_P1
List of Archived Logs in backup set 671267
Thrd Seq Low SCN Low Time Next SCN Next Time
1 44838 503688661 29-MAY-11 503701009 29-MAY-11
2 22519 503688659 29-MAY-11 503701007 29-MAY-11
BS Key Size Device Type Elapsed Time Completion Time
671302 16.55M DISK 00:00:05 30-MAY-11
BP Key: 671305 Status: AVAILABLE Compressed: YES Tag: TAG20110530T000048
Piece Name: F:\OSSTDBY_BACKUP\ARCH\OSONDEMA_ARC_20110530_G5MDJ5TG_S25093_P1
List of Archived Logs in backup set 671302
Thrd Seq Low SCN Low Time Next SCN Next Time
1 44839 503701009 29-MAY-11 503716961 30-MAY-11
2 22520 503701007 29-MAY-11 503716959 30-MAY-11
BS Key Size Device Type Elapsed Time Completion Time
671337 5.13M DISK 00:00:02 30-MAY-11
BP Key: 671340 Status: AVAILABLE Compressed: YES Tag: TAG20110530T020121
Piece Name: F:\OSSTDBY_BACKUP\ARCH\OSONDEMA_ARC_20110530_G7MDJCVI_S25095_P1
List of Archived Logs in backup set 671337
Thrd Seq Low SCN Low Time Next SCN Next Time
1 44840 503716961 30-MAY-11 503729544 30-MAY-11
2 22521 503716959 30-MAY-11 503729542 30-MAY-11
BS Key Size Device Type Elapsed Time Completion Time
671372 5.25M DISK 00:00:03 30-MAY-11
BP Key: 671375 Status: AVAILABLE Compressed: YES Tag: TAG20110530T040055
Piece Name: F:\OSSTDBY_BACKUP\ARCH\OSONDEMA_ARC_20110530_G9MDJJVN_S25097_P1
the archives are in the location of
F:\OSSTDBY_BACKUP\ARCH\OSONDEMA_ARC_20110529_G1MDINRJ_S25089_P1
when it is not specified in catalog how can i delete archives from f location i.e
F:\OSSTDBY_BACKUP\ARCH\OSONDEMA_ARC_20110529_G1MDINRJ_S25089_P1
please let me know from rman how can i delete archives from f location...........................
do i need to register with catalog?
i have used Delete archivelog all completed before 'SYSDATE-10';
but no use
out put is
MAN> Delete archivelog all completed before 'SYSDATE-10';
eleased channel: ORA_DISK_1
llocated channel: ORA_DISK_1
hannel ORA_DISK_1: sid=311 devtype=DISK
pecification does not match any archive log in the recovery catalog
MAN> crosscheck backup archivelog all;
please send me the query which i can delete ......................thanks
cheers
mahesh

EdStevens wrote:
856483 wrote:
<snip>
can i have you mobile contact phone number if possible?
I have seen some pretty astonishing requests on this board, but this one really raises (or lowers) the bar. Just what is it your boss is paying you to do?
Some listserves have lots of people giving their number. I find it odd that people would, but not astonishing for someone to ask. Outside the norm here, but how would someone know ahead of time? It's a bravely connected new world.

Why SYS cannot be the owner of the recovery catalog

my question is why? i know SYS cannot be the owner of the recovery catalog as per oracle documentations and books.
why SYS cannot be the owner of the recovery catalog?

Hi
SYS is like root/system admin for the database. It has to distribute jobs according to specific purpose. SYS could have been the owner of RMAN catalog but it does not make sense to keep it with SYS objects as it is easier to find all related catalog tables in a separate schema rather than combing with any other sys/system schema. The choice is logical.
Regards

"specification does not match any archived log in the recovery catalog"

I would like to know about this message.
I Validated my backup and archivelogs yesterday.
Today when I tried to do - CROSSCHECK ARCHIVELOG ALL;
I gave me the following error -
RMAN> crosscheck archivelog all;
released channel: ORA_SBT_TAPE_1
released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=291 device type=DISK
specification does not match any archived log in the recovery catalog
when I tried to list all the archivelogs then also I am getting this message -
RMAN> list archivelog all;
specification does not match any archived log in the recovery catalog
I have retention policy of 15 Days.
Waiting for your inputs.

Thanks Werner..This means that it is just a message.
One more question related to Archive Log backups -
traditionally DBAs used to take backup of an Archivelog by spupplying "alter system archive log current" before taking the backup. somewhat like -
run
allocate channel t1 device type 'sbt_tape' PARMS="ENV=(TDPO_OPTFILE=/oracle/TESTDB/tdpo.opt)";
sql 'alter system archive log current';
backup archivelog all delete input;
release channel t1;
But, since RMAN automatically archives CURRENT redo log at the start of the archivelog backup, do we REALLY need to pass sql 'alter system archive log current'; before starting the archivelog backup in the script?
RMAN> backup archivelog all;
Starting backup at 11-MAR-10
current log archived ===========> RMAN automatically archived the CURRENT redo log
released channel: ORA_DISK_1
allocated channel: ORA_SBT_TAPE_1
related question to this is - Since it generates one archived log everytime it takes the archived log backup, this backup may get hung if the archived destination is 100% full. Is there any way we can take the archive log backup without generating an extra archived log before the start of the backup?
Thanks,
Roopesh

Specification does not match any archive log in the recovery catalog

Hi
My rman backups sometimes fails with below error, any idea the reason ?
run {
allocate channel t1 type 'SBT_TAPE';
backup
incremental level 0
format '/%d_%p_%t.%s/'
maxsetsize = 8G
(database);
backup
format '/%d_%p_%t_al.%s/'
(archivelog from time 'SYSDATE-2');
backup
format '/%d_%p_%t_al.%s/'
(archivelog until time 'SYSDATE-2' delete input);
release channel t1;
Starting backup at 2011-01-18 22:41:59
current log archived
channel t1: starting archive log backupset
channel t1: specifying archive log(s) in backup set
input archive log thread=1 sequence=7348 recid=6260 stamp=740682001
input archive log thread=1 sequence=7349 recid=6261 stamp=740702540
input archive log thread=1 sequence=7350 recid=6262 stamp=740739604
input archive log thread=1 sequence=7351 recid=6263 stamp=740746801
input archive log thread=1 sequence=7352 recid=6264 stamp=740757602
input archive log thread=1 sequence=7353 recid=6265 stamp=740768401
input archive log thread=1 sequence=7354 recid=6266 stamp=740788921
channel t1: starting piece 1 at 2011-01-18 22:42:04
channel t1: finished piece 1 at 2011-01-18 22:42:29
channel t1: backup set complete, elapsed time: 00:00:26
Finished backup at 2011-01-18 22:42:29
Starting backup at 2011-01-18 22:42:31
released channel: t1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 01/18/2011 22:42:31
RMAN-06004: ORACLE error from recovery catalog database: RMAN-20242: specification does not match any archive log in the recovery catalog
Recovery Manager complete.

Hi Ora 83,
What is the reason of this error ? The reason for the RMAN-20242 is there are no archivelogs which comply to the filter "until time 'SYSDATE-2'" at 18 Jan 22:42.
Probably you run a purge command more frequent because the oldest logsequence available for backup was created at:
2011 JAN 17 17 00 01 (=sequence=7348)
and the latest at:
2011 JAN 18 22 42 01 (=sequence=7354)
according to your output.
So for some reason the archivelogs created before 16th Jan 22:42 are not on the system as well as the archivelogs created between 16th Jan 22:42 and 17 Jan 17:00.
Maybe there are none (you can check in the alertlog and let us know)?
Regards,
Tycho

Query to identify the recovery catalog database name from target database

Hi,
How to get the recovery catalog database name from the registered target database?
i dont know my recovery catalog database for my target database.
I know we can use the query
select * from rc_database;
from recovery catalog database to know all the registered database with the recovery catalog but I want to know is there any way or query to identify the recovery catalog database name from target database to which the target database is registered
With Regards
Boobathi P

You can check the backup scripts which you use to backup your target database to get the catalog database name.
And check the corresponding connect string in TNSNAMES.ORA file or tnsping to get the server details of the catalog database.
Edited by: gopal on Apr 12, 2013 12:59 PM

HT4718 What USB Flashdrive can I use for the Recovery System a 4G or a 8G?

What size of drive do I need for the Recovery System? Can I use a USB flashdrive?

If you're talking about just the Recovery HD, you only need 1GB so use a 4GB USB thumb drive and the OS X Recovery Disk Assistant to create it.
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PERFORMING FULL RECOVERY WHEN THE RECOVERY CATALOG AND CONTROLFILE ARE LOST

제품 : RMAN
작성날짜 : 2002-05-30
PERFORMING FULL RECOVERY WHEN THE RECOVERY CATALOG AND CONTROLFILE ARE LOST
===========================================================================
PURPOSE
Recovery Catalog와 Controlfile이 손상되었을 때 Oracle9i의 new feature인
Controlfile Autobackup을 이용하여 full recovery를 수행하는 방법을 알아본다
EXPLANATION
Catalog와 Controlfile이 모두 손상되었을 경우 full recovery를 수행할 수 있도록
하기 위해 oracle9i부터 Controlfile Autobackup이라는 New feature를 제공한다.
이 Feature가 활성화되면 RMAN은 자동으로 특정 형식(specific format)으로
controlfile을 backup한다 나중에 RMAN은 Recovery catalog를 access하지 않고도
이 backup을 인식할 수 있다. 이 형식은 "%F"라는 variable을 포함하는데
이 variable은 중요한 정보인 DATABASE ID를 포함하고 있다.
이것은 다음과 같은 CONFIGURE 명령을 사용하여 Turn-on 될 수 있다.
RMAN> configure controlfile autobackup on;
활성화시킨 후에 controlfile autobackup의 format을 변경할 수 있다. 그러나
이것은 반드시 variable "%F"를 포함해야만 한다. 그렇지 않으면 다음과 같은 Error
를 만나게 된다.
RMAN> configure controlfile autobackup format for
2> device type disk to 'c:\backups\%U';
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00579: the following error occurred at 01/31/2002 11:57:21
RMAN-03002: failure during compilation of command
RMAN-03013: command type: configure
RMAN-06492: controlfile autobackup format "c:\backups\%U" must specify a "%F"
format specifier
%F 는 RMAN이 recovery catalog 없이 backup piece를 인식하도록 Key이다.
이 Feature가 활성화 된 후에 RMAN은 BACKUP 명령을 수행할 때마다 controlfile에
대해서 별도의 backup을 수행한다. 이전에는, controlfile 은 오직 system
tablespace가 backup되는 경우에만 자동으로 backup되었다.
Database Backup은 아래와 같은 log를 출력한다.
RMAN> backup database;
Starting backup at 31-JAN-02
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=12 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE\ORADATA\PROD\SYSTEM01.DBF
input datafile fno=00002 name=C:\ORACLE\ORADATA\PROD\UNDOTBS01.DBF
input datafile fno=00005 name=C:\ORACLE\ORADATA\PROD\EXAMPLE01.DBF
input datafile fno=00006 name=C:\ORACLE\ORADATA\PROD\INDX01.DBF
input datafile fno=00008 name=C:\ORACLE\ORADATA\PROD\USERS01.DBF
input datafile fno=00003 name=C:\ORACLE\ORADATA\PROD\CWMLITE01.DBF
input datafile fno=00004 name=C:\ORACLE\ORADATA\PROD\DRSYS01.DBF
input datafile fno=00007 name=C:\ORACLE\ORADATA\PROD\TOOLS01.DBF
channel ORA_DISK_1: starting piece 1 at 31-JAN-02
channel ORA_DISK_1: finished piece 1 at 31-JAN-02
piece handle=C:\BACKUPS\01DFKAIH_1_1 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:56
Finished backup at 31-JAN-02
Starting Control File Autobackup at 31-JAN-02
piece handle=C:\BACKUPS\C-4159396170-20020131-00 comment=NONE
Finished Control File Autobackup at 31-JAN-02
Note:
Controlfile backup은 backup의 끝에서 수행된다.
그리고 이 backup piece name의 두번째 string은 dbid이다(4159396170)
Current controlfile이 database와 함께 손실되고 Recovery catalog도 손상되어
사용할 수 없게 되었을 때 controlfile autobackup이 controlfile을 restore하기
위해 사용될 수 있다. restore된 controlfile은 db를 mount하고 datafile들을
restore하기 위해 사용될 수 있다.
Controlfile autobackup을 이용하여 full recovery를 수행하기 위해서는 아래와
같은 과정을 수행하면 된다.
1. Target instance를 위한 new init.ora를 생성한다. backup이 있다면 이것을
사용할 수 있다.
2. Startup nomount your new instance.
3. RMAN은 시작하나 어떤 connect statement도 수행하지 않는다.
4. RMAN prompt상에서 DBID를 설정한다. 만약 DBID를 모르면 controlfile autobackup
의 이름으로부터 이것을 알 수 있다.
RMAN> set dbid=4159396170;
5. Dbid를 설정한 후에 nomount로 startup한 target instance에 connect한다.
RMAN> connect target /
6. 만약에 backup이 disk상에 있고 controlfile autobackup을 non-default location
으로 지정하였다면 파일을 다음과 같은 위치로 옮겨 놓는다
ON UNIX : ORACLE_HOME/dbs
ON WINDOWS: ORACLE_HOME/database
RMAN은 controlfile autobackup을 찾기 위해 위 directory를 검색한다.
만약 controlfile autobackup location을 바꾸지 않으면 위 directory안에
backup이 생성되게 된다.
만약에 backup이 tape에 있다면 restore시 channel과 device를 기술하기 위해서
run block을 사용해야 한다. database가 mount되어 있지 않기 때문에
default device와 channel을 설정할 수 없다.
RMAN> run { allocate channel c_1 type 'sbt_tape'
parms "ENV=(NB_ORA_SERV=rm-wgt)";
restore controlfile from autobackup;}
7. Restore the controlfile:
RMAN> restore controlfile from autobackup;
8. Mount the database from the restored controlfile:
RMAN> alter database mount;
9. Restore datafiles:
RMAN> restore database;
10. file들을 restore한 후에 recovery를 수행할 수 있다.
이때 current online redo log가 없고 또한 backup controlfile을 사용하기
때문에 incomplete recovery를 수행해야 한다. 이를 수행하기 위해서는
"UNTIL TIME"을 설정해야 하고 open시에는 resetlogs를 사용해야 한다.
RMAN> set until time=<time stamp>;
RMAN> recover database;
RMAN> alter database open resetlogs;
REFERENCE DOCUMENT
NOTE:174623.1

BACKUP Command Behavior
ON
If the backup includes datafile 1, then RMAN does not automatically include the current control file in the datafile backup set. Instead, RMAN writes the control file and server parameter file to a separate autobackup piece.
Note: The autobackup occurs regardless of whether the BACKUP or COPY command explicitly includes the current control file, for example, BACKUP DATABASE INCLUDE CURRENT CONTROLFILE.
OFF
If the backup includes datafile 1, then RMAN automatically includes the current control file and server parameter file in the datafile backup set. RMAN does not create a separate autobackup piece containing the control file and server parameter file.
BUT Dear Mohammed,
It is not working accordingly. what I did is :-
1. I switched off the AUTOBACKUP
2. Then I took whole database backup, that means it included File # 1
3. But according to above it is going to include autobackup of controlfile and spfile in the same backupset .
4. But when I asked it to restore controlfile from autobackup it said NO AUTOBACKUP FOUND.
COULD YOU PLEASE HELP ME ONCE AGAIN DEAR.
If it works accroding to above then it should have my Autobackup.
Regards
Harpreet Singh

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This question was solved.
View Solution.

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****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

Minimum size of SGA for the recovery catalog db ?

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