SCN (System Change Number) is a primary mechanism to maintain data consistency in Oracle database. SCN is used primarily in the following areas, of course, this is not a complete list: Every redo record has an SCN version of the redo record in the redo header (and redo records can have...
A graph database is defined as a specialized, single-purpose platform for creating and manipulating graphs. Graphs contain nodes, edges, and properties, all of which are used to represent and store data in a way that relational databases are not equipped to do. Graph analytics is another commo...
A cloud database is a database that is built, deployed, and accessed in a cloud environment, such as a private, public, or hybrid cloud. There are two primary clouddatabase deploymentmodels, reviewed below: Traditional Database Is very similar to an onsite, in-house manageddatabase—except...
This section describes new features of Oracle9i Data Guard and provides pointers to additional information. New feature information from Oracle8i releases is retained to help those users migrating to the current release. The following sections describe the new features in Data Guard: ...
The online redo log of a database consists of two or more online redo log files. Oracle requires two files to guarantee that one is always available for writing while the other is being archived, if desired. LGWR writes to online redo log files in a circular fashion; when the current ...
Oracle Database Database View products (1) Hello Experts, I ran a Index repair job on our BW system: SAP_INFOCUBE_INDEXES_REPAIR The job completed successfully rebuilding some of the secondary indexes. However, I found the following error in system log: ORA-01551: extended rollback segment...
I have noticed a new file in the oracle_home\database folder and I am unable to find out information about it. It looks like a backup of the control file (which I have the standard 3 copies in other directories already setup). I would like to know if this files is essential to ...
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Oracle CDC origin reads data from redo logs using an Oracle tool calledLogMiner. Redo Logs store every single change that happened on the database, which is why they are really large in size. To avoid consuming massive amounts of disk space, these logs are usually removed from the database...
If this table is full then your jobs will fail. If you want to avoid theh issues you have to extedn the table sapce. For UNDO: http://www.databasejournal.com/features/oracle/article.php/3820841/Failures-within-Your-UNDO-Tablesp... How To Extend Table space on oracle: http://scn....