Changing the size and number of the online redo log files is sometimes done to tune the database. You can add online redo log file groups or members to the primary database without affecting the standby database. Similarly, you can drop log file groups or members from the primary database without affecting your standby database….
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EXAMPLE OF HOW TO RESIZE THE ONLINE REDO LOGS: ============================================== Often times the online redo logs are sized too small causing database performance problems. The following is an example of how to resize the online log groups: 1. First see the size of the current logs: SVRMGR> connect internal (with 9i/10g use SQL> connect /…
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Purpose: ======== The purpose of this article is to describe the behavior of the standby database when one or more datafiles on the primary database are resized. Standby Database Behavior When a Datafile is Resized on the Primary Database: ============================================================================= On the primary database the initial size of the datafile is 113246208. You decide to…
POTENTIAL SOLUTION(S) for AWR Snapshot Error ============================================ (*) To take the snapshots we need to populate WRM$_SNAPSHOT table successfully and for that instance metadata should be present in WRM$_DATABASE_INSTANCE. (*) To regenerate the AWR objects run catnoawr.sql and catawr.sql scripts from $ORACLE_HOME/rdbms/admin (*) Then RESTART the database So, if we have regenerated the AWR objects…
Changing the Global Database Name: Example The following statement changes the global name of the database and includes both the database name and domain: ALTER DATABASE RENAME GLOBAL_NAME TO demo.world.oracle.com;
PURPOSE ======= This note discusses resolving an RMAN Hung Job SCOPE & APPLICATION =================== Anyone involved in running RMAN jobs Resolving an RMAN Hung Job ========================== Components of an RMAN Session The nature of an RMAN session depends on the operating system. In UNIX, an RMAN session has the following processes associated with it: –…
/************************ wait.sql *************************/ set pages 2000 set lines 132 column p1text format a18 column event format a35 column WT format 9999 column SW format 9999 select sid, event,p1text,p1raw,p1,p2,p3,seconds_in_Wait “SW”,Wait_time “WT” from v$session_wait where event not in( ‘KXFQ: Dequeue Range Keys – Slave’, ‘KXFQ: Dequeuing samples’, ‘KXFQ: kxfqcls – consumer closing TQ’, ‘KXFQ: kxfqdeq – dequeue…
The Mutating table error is a well-known problem encountered in development; most developers have come across this error. ORA-04091: table is mutating, trigger/function may not see it The basic reason for this error is the way that Oracle manages a read consistent view of data. The error is encountered when a row-level trigger accesses the…
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When u add a datafile in Primary then those changes are not immediately propagated to standby. Once Log with this changes applied to standby, standby database create a filename in $ORACLE_HOME/dbs. This is just a file name and does not have physical file. After this even all log apply service will fail as this is…
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When you are using tablespace with segment space management AUTO then following command will not show FREELISTS. Alter table move tablespace my_data storage (initial 20M freelists 9) initrans 9; If tablespace is crreated with segment space management AUTO Then USER_TABLES.FREELISTS does not show FREELISTs as 9, but it displays blank in FREELISTS column.
