Changing the Global Database Name
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;
Resolving RMAN Hung Jobs
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: –…
Vivek Tuning for Row Locks.
/************************ 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…
Mutating Table Error while using database trigger
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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Adding Datafile on Primary Server and Impact on Standby Server
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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USER_TABLES.Freelists
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.
My Test Case On 21-OCT-2005
(*) if you grant any role to grantee while grantee is connected to database. He cannot use that role immediately. To use it immediately he needs to execute “Set role role_name” in his session. This will enable that role for him or he needs to logoff and login again. (*) If you have given any…
TABLE SIZING WITH DB_BLOCK ARCHITECTURE Reference : Metalink note : 10640.1
=================================================================== STEP-I First, calculate the total block header size: =================================================================== block header = fixed header + variable transaction header + table directory + row directory where: fixed header = 57 bytes (the 4 bytes at the end of the block have already been taken account of in the 24 bytes for the cache header) variable…
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FGA Part-I
=========================================================================================================================================== Fine-Grained Auditing Part-I: Reference : from Arup Nanda on http://www.oracle.com/technology/oramag/webcolumns/2003/techarticles/nanda_fga.html ——————————————————————————————————————————————- (*) Traditional Oracle Database auditing options let you track the actions users perform on objects at the macro level for example, if you audit for SELECT statements on a table, you can track who selected data from the table. However, you don’t know…
Updated LCK.SQL file.
select c.sid, c.serial#, f.spid as osprocess, c.username, a.object_id, b.object_name, c.program, c.status, d.name, c.osuser, e.sql_text, DBMS_ROWID.ROWID_CREATE(1, c.ROW_WAIT_OBJ#, c.ROW_WAIT_FILE#, c.ROW_WAIT_BLOCK#, c.ROW_WAIT_ROW# ) locked_rowid from v$Locked_object a, All_objects b, v$session c, audit_actions d, v$sqlarea e, v$process f where a.object_id=b.data_object_id and a.session_id =c.sid(+) and c.command=d.action and c.row_wait_obj# != -1 and c.sql_id=e.sql_id and c.paddr = f.addr;