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Similaire à GLOC 2014 NEOOUG - Oracle Database 12c New Features (20)
GLOC 2014 NEOOUG - Oracle Database 12c New Features
- 1. Copyright © 2013 OneNeck IT Services Corporation. All Rights Reserved.1
Rest of the Database 12c
Features for 11g DBA!
Biju Thomas 14-May-14
- 2. Copyright © 2013 OneNeck IT Services Corporation. All Rights Reserved.2
Rest of the Database 12c
Features for 11g DBA!
- 3. Copyright © 2013 OneNeck IT Services Corporation. All Rights Reserved.3
Speaker
• Oracle ACE
• Principal Solutions Architect with
OneNeck® IT Solutions
• More than 20 years of Oracle database
administration experience and over 7 years
of E-Business Suite experience
• Author of Oracle12c OCA, Oracle11g OCA,
co-author of Oracle10g, 9i, 8i certification
books published by Sybex/Wiley.
• Presentations, Articles, Blog, Tweet
- 4. Copyright © 2013 OneNeck IT Services Corporation. All Rights Reserved.4
Session Objectives
• As a 11g DBA, what you should know when
working with 12c database (changed behavior
or additional functionality)
• New Features – that will impact the traditional
way of administration and management
• High level – once you know what to look for,
“search” is always an option!
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ADMINISTRATION AND MANAGEABILITY
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Online Data File Move
• File move (rename) in 11g
– Take tablespace offline
– Use OS command to copy or move file
– Use SQL to update the controlfile – ALTER DATABASE
RENAME FILE or ALTER TABLESPACE … RENAME
DATAFILE
– Bring tablespace online
• File move in 12c
– Just one step!
– ALTER DATABASE MOVE DATAFILE ‘x’ TO ‘y’
– The “TO” clause is optional – if omitted, file is moved
to DB_CREATE_FILE_DEST as OMF.
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More to File Move…
• Files belonging to SYSTEM tablespace can be moved using
ALTER DATABASE MOVE DATAFILE, online!
• MOVE DATAFILE syntax allows only 1 file move at a time. You
can still move multiple files with ALTER DATABASE RENAME
FILE or ALTER TABLESPACE RENAME DATAFILE options –
but offline mode.
• File can be moved from file system to ASM disk group, and
vice versa.
• File can be moved from one diskgroup to another in ASM.
• Optional KEEP clause to keep copy of the data file at the
source.
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Temporary Undo
• By default, undo information on global temporary-
table DML operations are stored in the undo
tablespace, similar to undo operations on
persistent tables.
• New parameter TEMP_UNDO_ENABLED
• Undo information generated by DML operations on
temporary tables stored in the temporary
tablespace; therefore, no redo is generated for the
undo operation.
• Reduces the amount of undo data stored in the
undo tablespaces, and the amount of redo from the
undo.
• Parameter is session modifiable.
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Listener Registration
• New mandatory background process LREG
• Registers information about the database instance
and dispatcher processes with the Oracle Net
Listener
• When an instance starts, LREG polls the listener to
determine whether it is running. If the listener is
running, then LREG passes it relevant parameters.
If it is not running, then LREG periodically attempts
to contact it.
• Manual listener registration using ALTER SYSTEM
REGISTER – same as in 11g.
• In 11g, PMON process had this responsibility.
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Limit PGA
• New parameter PGA_AGGREGATE_LIMIT
• Specifies a limit on the aggregate PGA
memory consumed by the instance
• Default Value:
– Greater of
• 2 GB
• 200% of PGA_AGGREGATE_TARGET
• 3 MB times the PROCESSES parameter.
– It will not exceed 120% of the physical memory
size minus the total SGA size.
• PGA_AGGREGATE_TARGET maintains the
same behavior as 11g
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DDL Logging
• ENABLE_DDL_LOGGING
– Introduced in 11g
– Writes DDL statements to Alert
log
• What’s different in 12c?
– Instead of alert log, writes to
DDL log directory in ADR
– <ADR Home>/log/ddl
– File log.xml
• The Catch:
– Either Database Lifecycle
Management Pack or Change
Management Pack must be
licensed
$ cat log.xml
<msg time='2014-04-
29T16:48:23.352-07:00'
org_id='oracle' comp_id='rdbms'
msg_id='opiexe:4181:2946163730'
type='UNKNOWN' group='diag_adl'
level='16'
host_id='emcc.example.com'
host_addr='10.0.2.15'
version='1'>
<txt>create table biju_test (n
number)
</txt>
</msg>
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Viewing DDL Log
• Use adrci : New option – SHOW LOG
• Default shows all logs – ddl, debug and test
• Filter ddl logs using –l. Further filter using the –p option
• Try “help show log” to see all predicate string options with -p
adrci> show log -l ddl -p "message_text like '%biju%'"
ADR Home = /u02/app/oracle/diag/rdbms/ocadb1/ocadb1:
****************************************************************
Output the results to file: /tmp/utsout_4170_140592_1.ado
adrci>
2014-04-29 16:48:23.352000 -07:00
create table biju_test (n number)
2014-04-29 16:48:31.853000 -07:00
drop table biju_test
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Last Login Time
• Security related values in the USER$ table are [as existed in 11gR2]:
– CTIME: Date & Time when user was created
– PTIME: Date & Time when user password was last changed
– LTIME: Date & Time when the user account was locked
– LCOUNT: Number of failed login attempts
• Added in Oracle Database 12c:
– SPARE6: Last login time of the user.
• Displayed when you invoke SQL*Plus
$ sqlplus hr/hr
SQL*Plus: Release 12.1.0.1.0 Production on Tue Jul 9 23:34:32 2013
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Last Successful login time: Tue Dec 09 2013 23:34:22 -05:00
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options
SQL>
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Cascaded TRUNCATE
• New CASCADE clause for TRUNCATE
• Truncates all child tables that reference
truncated table.
• Foreign key must be defined with ON
DELETE CASCADE option
• Foreign key must be in ENABLED status.
• Children, grand children are truncated
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Do More w/o Waiting
• More DDL statements support ONLINE
– Dropping an index (DROP INDEX ... ONLINE)
– Marking an index as UNUSABLE (using ALTER
INDEX ... UNUSABLE ONLINE)
– Marking a column as UNUSED (ALTER TABLE
... SET UNUSED ... ONLINE)
– Dropping a constraint (ALTER TABLE ... DROP
... ONLINE)
– Moving a table partition (ALTER TABLE ...
MOVE PARTITION ... ONLINE)
– Moving a table subpartition (ALTER TABLE ...
MOVE SUBPARTITION ... ONLINE)
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Multiple Partition Management
• Merge Multiple Partitions
• Split Multiple Partitions
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More Partition Management
• Add Multiple partitions
• Drop Multiple Partitions
• Truncate Multiple Partitions
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Bigger VARCHAR2
• VARCHAR2 [and NVARCHAR2, RAW] column
width up to 32767 bytes
• Parameter MAX_STRING_SIZE = EXTENDED –
must change only when the database is started in
UPGRADE mode
• Once enabled, no going back
• Invalidates views and materialized views, compile
after change.
• Individual PDBs in a CDB can have different
setting
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Changing MAX_STRING_SIZE
• ALTER PLUGGABLE DATABASE
CLOSE [IMMEDIATE]
• ALTER PLUGGABLE DATABASE
OPEN UPGRADE
• Change the setting of
MAX_STRING_SIZE to EXTENDED
• Run the ?/rdbms/admin/utl32k.sql
script as SYSDBA.
• ALTER PLUGGABLE DATABASE
CLOSE
• ALTER PLUGGABLE DATABASE
OPEN
• Shutdown database
• Start the database in
UPGRADE mode
• Change the setting of
MAX_STRING_SIZE to
EXTENDED
• Run the
?/rdbms/admin/utl32k.
sql script as SYSDBA.
• Restart the database in
normal mode.
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Multi-threaded Processes
• New Parameter: THREADED_EXECUTION (YES/NO)
• Allows multiple background processes to share a single
OS process on Unix, similar to Windows.
• In default process models, SPID and STID columns of
V$PROCESS will have the same values, whereas in
multithreaded models, each SPID (process) will have
multiple STID (threads) values.
• The EXECUTION_TYPE column in V$PROCESS will
show THREAD.
• V$BGPROCESS shows the background processes.
• Listener.ora should have
DEDICATED_THROUGH_BROKER_<listener-name>=ON
• Cannot Login ‘/ AS SYSDBA’
– Must use SYS AS SYSDBA
12
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Row Limiting Clause
• New clause in SELECT statement
• Follows the ORDER BY clause
[ OFFSET offset { ROW | ROWS } ]
[ FETCH {FIRST | NEXT} [ {rowcount | percent PERCENT} ]
{ ROW | ROWS } { ONLY | WITH TIES } ]
• OFFSET clause is used to skip the specified number of
rows before the limiting begins.
• FETCH clause can specify the number of rows to
return or a percentage of rows to return.
• ONLY specifies to return exact number or percent of
rows to return.
• WITH TIES specifies to return all rows that have the
same sort keys as the last row of the row-limited result
set.
http://bijoos.com/oraclenotes/2013/95
13
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Row Limiting Examples
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Invisible Columns
• Columns can be invisible (ALTER TABLE,
CREATE TABLE syntax – INVISIBLE)
• Column Order changes when you make
column invisible (and visible again!)
• Not supported on temporary and external
tables
• Specify explicitly in INSERT, SELECT
clauses
• SQL*Plus: SET COLINVISIBLE ON
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ENHANCEMENTS TO TOOLS AND UTILITIES
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Database Express 12c
• Database Control is history…
• Requires XDB. EM Express is a servlet built on top of
Oracle XML DB.
• Deafult port is 5500, can be changed using
DBMS_XDB_CONFIG.setHTTPsPort (<port>)
procedure
• URL is https://<hostname>:5500/em
• Available only when the database is open
• The EM_EXPRESS_BASIC role enables users to
connect to EM Express and to view the pages in read-
only mode.
• The EM_EXPRESS_ALL role enables users to connect
to EM Express and use all the functionality.
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Database Express Home
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Enhanced Patching
• “datapatch” to run post patch scripts
– Will automatically determine post scripts and actions
– MOS Note “Datapatch: Database 12c Post Patch SQL
Automation (Doc ID 1585822.1)”
• Queryable patch inventory using
DBMS_QOPATCH Package
– Shows all the patch information available as part of the
OPATCH LSINVENTORY -XML command.
– Queryable Patch Inventory requies Oracle database
instance to be open in read/write mode.
– MOS Note “Oracle Database 12.1 : FAQ on Queryable
Patch Inventory (Doc ID 1530108.1)”
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Data Pump NOLOGGING Import
• Import without generating archived logs
– TRANSFORM=DISABLE_ARCHIVE_LOGGING:Y[:TABLE|INDE
X]
• Sets object to NOLOGGIG before import and reverts to original
setting after import.
• Choose to disable logging for tables (Y:TABLE), indexes
(Y:INDEX), or both (Y).
$ impdp DIRECTORY=dump_dir DUMPFILE=ex2.dmp
LOGFILE=ex2.log SCHEMAS=ball
TRANSFORM=DISABLE_ARCHIVE_LOGGING:Y:TABLE
$ impdp DIRECTORY=dump_dir DUMPFILE=ex1.dmp
LOGFILE=ex1.log SCHEMAS=basket
TRANSFORM=DISABLE_ARCHIVE_LOGGING:Y
TRANSFORM=DISABLE_ARCHIVE_LOGGING:N:INDEX
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Data Pump Export Views As Tables
• Export one or more views as tables
– VIEWS_AS_TABLES=[schema_name.]view_na
me[:table_name], ...
• table_name specifies the name of a table to
serve as the source of the metadata for the
exported view (mainly for RO db).
• Data Pump performs a table-mode export.
• Useful to get a subset of data exported.
• Also available in “impdp” to use in the network
mode of import.
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RMAN Notables
• “Describe” in RMAN, similar to SQL*Plus.
• Most SQL statements can be run in RMAN
without the “SQL” prefix (and messing with
quotes around the SQL!!).
• SYSBACKUP Administration Role – Start
replacing scripts where SYSDBA is used
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RMAN Restore Table
• The biggest RMAN feature is restore table
from backup.
RECOVER TABLE SCOTT.EMP, SCOTT.DEPT
UNTIL TIME 'SYSDATE-1'
AUXILIARY DESTINATION '/t1/tdb'
DATAPUMP DESTINATION '/t1/dump'
DUMP FILE 'emp_dept_dump.dat'
REMAP TABLE 'HR'.'EMP':'EMP_RECVR';
--NOTABLEIMPORT;
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What Else…
• Documentation (docs.oracle.com)
– New Features Guide
– First chapter in most books
• Oracle Database 12c New Features Series
• Oracle Database 12c Learning Library
- 33. Copyright © 2013 OneNeck IT Services Corporation. All Rights Reserved.35
TechNet Interactive Reference
• http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/
12c/r1/poster/OUTPUT_poster/poster.html#
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Database 12c Learning Library
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OLL- 12c New Features Series
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New Features on Biju’s Blog
http://bijoos.com/oraclenotes
• OracleDB12c New Feature: ASMCMD Commands for Password File Management
• OracleDB12c New Feature: Password File in ASM
• OracleDB12c New Feature: Exporting View Data
• OracleDB12c New Feature: Misc Security Changes
• OracleDB12c New Feature: Rename and Replace ASM Disk(s) in Diskgroup
• OracleDB12c New Feature: Last Login Time of User
• OracleDB12c New Feature: No Logging Option in Data Pump Import
• OracleDB12c New Feature: Added Administrative Privileges
• OracleDB12c New Feature: Adding, Dropping, Truncating Multiple Partitions
• OracleDB12c New Feature: Merging and Splitting Multiple Partitions
• OracleDB12c New Feature: Use of Sequence Value in Column DEFAULT
• OracleDB12c New Feature: Identity Column
• OracleDB12c New Feature: SQL*Plus NOLOGINTIME Option
• OracleDB12c New Feature: More to Online Data file Move
• OracleDB12c New Feature: RMAN Describe
• OracleDB12c New Feature: Cascaded Truncate
• OracleDB12c New Feature: Store More in VARCHAR2
• OracleDB12c New Feature: New Row Limiting Clause in SELECT
• Oracle Database 12c – Few Links
• OracleDB12c New Feature: Capture Privilege Usage
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Thank you!
Thank you for your time…
Contact:
Tweets: @Biju_Thomas
Facebook: OracleNotes
Blog: bijoos.com/oraclenotes
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