I am studying about these two technologies and the only difference that I found was that optimization doesn't backup the duplicated archivedlogs.
If both ignore not changed blocks, what is more effective?
The optimization backup also has some tracking file?
does, block change tracking file is read during incremental level 0 backup?
View 4 Replies View Relatedi want to enable block change tracking as our incremental level1 backup take a lot of time but i have a worry which i found it on oracle support and tha is as follows Database Instance Hang at Database Checkpoint With Block Change Tracking Enabled. [ID 1326886.1]
View 2 Replies View Relatedi did such commands
1. RMAN -> backup incremental level 0 database;
2. SQLPLUS -> alter database enable block change tracking using file '/home/oracle/block_change_tracking.tr';
3. RMAN -> backup incremental level 1 cumulative database;
4. RMAN -> backup incremental level 1 cumulative database;
5. RMAN -> backup incremental level 1 cumulative database;
and for such order i noticed that block change tracking file wasn't used for any cumulative backup. for each cumulative backup was done full scan over database.
it was used after i did incremental level 0 backup, and again incremental 1 cumulative.
if i want this feature to be usefull i should enable it before my incremental level 0, or i should do incremental level 0 immediately after i enable it?
rdbms:oracle 10gr2
os:windows
with reference to
[URL]......
Quote:
A.2.2 Writing Backup Scripts for Disk and Tape Scenarios
As in the disk-only scenarios, the backup scripts in this section are categorized based on database workload. as stated very clearly it depends on the workload, more precisely the rate of block change. The size of the database can be found out based on formula from
[URL]....
so how would I know the rate of block change in order to know which script is suitable for me? I try to find out the rate of block change for the database based on change tracking file but based on
[URL].....
Quote:
The size of the change tracking file is proportional to the size of the database and the number of enabled threads of redo. The size is not related to the frequency of updates to the database. So how do I determine the rate of change? can the rate of block change based on size of archive logs?
I have the following information with me:
starting from 5/10/2011 0101
ending 5/18/2011 1114
this constitute to 9.5 days
F:
ecover_area>dir/w
1644 File(s) 27,942,770,176 bytes
2 Dir(s) 10,019,270,656 bytes free
average size of each file 27,942,770,176/1644
=16996818.841849148418491484184915
average size of each day's log = 27,942,770,176/9.5
=2941344229.0526315789473684210526
about 3G
If I have a database size of 92G, based on the archive log size of about 3G per day, can I conclude that a change of 3G/92G is considered as few block change?
how can i track the exception for three select statement in one pl-sql block. here is synario.......
begin
select * from emp where empno=1234; --statement 1
select * from cusotmers where cust_id=125; --statement 2
select * from products where product_id='a-3'; --statement 3
end;
i want to track exception any one for ex no_data_found for all these three different statement.
I know if i put this three statement in three different pl-sql sublock then i can trap it....
how can i trap it in one single block?
I have a Tablespace DP_TS_LOBS and i stores only secure file blobs in it. DP_TS_LOBS has only one datafile "LOB1.dbf" . I have RAMN optimization parameter on. I also have the backup of DP_TS_LOBS tablespace.
RMAN> backup tablespace dp_ts_lobs;
after storing few blobs the data file "LOB1.DBF" got full and added a new data file "LOB2.DBF". Few more BLOB's were stored to DP_TS_LOBS tablespace. Then I tried to backup the DP_TS_LOBS table space again, as expected both the data file were backed up as there were changes to both the datafile since last backup.
I was expecting with Optimization Parameter on, if RMAN has a datafile with same DBID, checkpoint SCN, creation SCN,RESETLOGS SCN,time already in the backup and data file is offline RMAN wont backup that data file again.
After few minutes with out performing any activities in the database, I put the "LOB1.DBF" to offline and executed the DP_TS_LOBS table space backup again but I still see RMAN backing up the both the data files.
I was closely monitoring the "CHECKPOINT_CHANGE#" and "CHECKPOINT_TIME" columns of v$datafile, the values for those columns changes for data files "LOB1.DBF" and "LOB2.DBF" when I execute backup tablespace command on DP_TS_LOBS even thought there was not any activity in the database to add or update or delete blob that are stored in DP_TS_LOBS table space.
Initially I thought it can be due to some unwritten committed blocks of dp_ts_lobs table space in the memory that got written to the datafiles while executing backup tablespace command and that why i saw the change in checkpoint scn and checkpoint time , but it keeps happening every time when I tried multiple times.
I would like to know that if I enable backup Optimization on then incremental full backup skip any files which was earlier backup? Because we may know that backup Optimization on ensure skip those files which are already taken backup.
Database : oracle 10g 10.2.0.3 .
i have an error with block corruption
Error: Corrupt block relative dba: 0x01c12a58 (file 7, block 76376)
What all the ,methods I can go for if we are working on a production environment with out any down time.
I can go for dbms repair package and restore and recover
Does change in segment size effect the rman backup size..??
I'm trying to understand do Rman backup the empty block from datafiles..?? And if it escape the empty block than inserting data in tables (increasing the number of used block) might change the size of total backup (Rman) size
how i can change backup datafile name into its original file name,bcoz at time backup datafile name is different and how i can change that name into its original datafile name so i apply recovery command in user managaed recovery..
View 7 Replies View RelatedI Require to Fetch the Group of Value in Item Block Selected through the User Selected LOV Value in Master.
Through Loop i Fetch the Records in Item Block.
When User Change the Selected LOV Value Require to Clear the Item Block.
BEGIN
FOR NRM IN (SELECT MTRLTYPE,STATUS,
MTRL_NO,MTRL_ID FROM JAWOADMIN)
LOOP
GO_BLOCK('NRMTRL_ITEM');
:NRMTRL_ITEM.NRMTRL_TYPE := NRM.MTRLTYPE;
:NRMTRL_ITEM.REMARKS := NRM.STATUS;
:NRMTRL_ITEM.NRMTRLREF_NO := NRM.MTRL_NO;
:NRMTRL_ITEM.NRMTRLREF_ID := NRM.MTRL_ID;
NEXT_RECORD;
END LOOP;
END;
How to Clear the Block before the above loop.
I have a requirement to get decrypted value of national_identifier from database and display in Social Security number, when user queries for employee in employee form of HRMS. Also, National_identifier should be in encrypted format in database table always.
To meet above requirement, I am using custom.pll. In WHEN-NEW-BLOCK-INSTANCE I am getting decrypted value of national_identifer from database and assigning it to :person.national_identifier(database block) by using COPY function, so far it is working as expected.
When user query for employee, he/she able to decrypted value. but if user closes the form it is asking 'Do you want to save changes you made' as there is a change in :person.national_identifier.
Do we have any property to reset record/block status to something like unchanged, so we will not get 'Do you want to save changes you made message'.
can we use set_block_property to program to switch multiple relationships. for example
if true then use relationshipA
else relationshipB
end if;
I want to change Database Data Block Property at runtime.
View 4 Replies View RelatedI'm trying to change the attributes on a display where the info is gathered via a routine that fills the data block with info. I've searched and tried using 'set item instance property' in several places within the data block using different triggers but still doesn't work.
No errors are encountered or shown. Attributes aren't changed based on a small test condition.
Error is occurred during the transaction...i.e.
ORA-00607: Internal error occurred while making a change to a data block
ORA-00600: internal error code, arguments: [4194], [89], [83], [], [], [], [], []
Difference between cold backup and cold cloning?
View 2 Replies View Relatedwhat is the difference b/w rman and oracle secure backup.
View 1 Replies View RelatedIs there a difference between the first set of commands and the second? Typically, I just use the first set?
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 30 DAYS;
DELETE NOPROMPT OBSOLETE;
and
CROSSCHECK ARCHIVELOG ALL completed before 'sysdate -30';
DELETE NOPROMPT OBSOLETE;
I have seen one command which I have not properly understading.
RMAN>change archivelog all crosscheck;
what is the difference with the below command:
RMAN>crosscheck archivelog all;
what could be the reason that following 2 (RMAN) commands return different results?
RMAN> list archivelog all completed before 'sysdate-2';
RMAN> list archivelog until time 'SYSDATE-2';
I have the following situation. There are two selects in the which look like this
UPDATE TABLE_B B
SET (
target
[Code]....
DB: Oracle 10i
MyFunction is relatively expensive and the second select works on a subset of the data considered in the first one (because of a.col2 > b.col3). For this reason I am looking for a way to do the job in only one update statement and compute MyFunction (a.x) only once per row.
My data warehouse application involves partitioned tables where indexes are originally unusable on the last partition and only built until the next partition is created. We have a query tool that our users use to query this table that has an option "include not indexed data", which is essentially telling the tool whether to include that last partition in the query. IF this is checked, and they are filtering against on of the indexed fields, there is the potential for an Oracle error stating it tried to use an unusable index so our tool basically builds the query like this:
select ... from (
select ... from table where partition_key < (last usable partition key)
union
select /*+ NO_INDEX */ ... from table where partition_key >= (last usable partition key)
)
where
index_field = :value
I have had a difficult time getting reasonable data to test this myself, so I'm asking the question here:
Is Oracle probably pushing that outer filter into the inner individual queries in the UNION? If we were to move the index_field filter into the inner query against each of the individual queries in the union, would it make a difference performance-wise?
What is difference between the flashback database(10g later) and incomplete recover?
View 5 Replies View RelatedSELECT filename, status, bytes
FROM v$block_change_tracking;
DISABLED
If we turn on block_change_tracking with RMAN, will it require a downtime?
I am looking for some tools for Performance analysis and optimization for Oracle. For now I looked over Spotlight, Ignite and Embarcadero DB Optimizer.
View 1 Replies View RelatedI am facing issue of block corruption in my exp backup which I am taking through expdp command. (Refer Attachment of Screen shot of error)
I want to know few things about the block corruption.
1. Why the block corruption occur.
2. How can I resolve this.
3. Can I rosolve this by deleting the same record on which this error is coming. if yes then how can I track that row in a table.
I already tried for DB verify utility. It shows the below result.
===================================================================
C:Documents and SettingsAdministrator>dbv file='E:ORADATAAFCCV1MONETA01.DBF' blocksize=8192
DBVERIFY: Release 11.1.0.6.0 - Production on Wed Feb 16 10:13:11 2011
Copyright (c) 1982, 2007, Oracle. All rights reserved.
DBVERIFY - Verification starting : FILE = E:ORADATAAFCCV1MONETA01.DBF
DBV-00600: Fatal Error - [28] [27070] [0] [0]
C:Documents and SettingsAdministrator>
================================================================
how to find the corruption block and judge whether it is physical corruption or logical corruption?
View 3 Replies View Relatedhave a repeatable technique for damaging a datafile block?
I need to demonstrate and contrast various recovery techniques, such as dbms_repair, RMAN block recovery, and Data Guard automatic block repair.
I'll end up with a shell script (or batch file) where I can enter a file number and block number, and wipe out that block.