oracle 12c database new features for dba

One: Multitenant Architecture (12.1.0.1)Multi-tenant architecture is the new heavyweight feature of Oracle 12c (12.1), built-in multi-tenancy (multi-tenancy), a container database (container) that can hold multiple pluggable Databases, Each pluggable database is independent

The new features of In-database archiving are introduced in Oracle Database 12c, which allows users to archive data by marking data rows on the table as inactive inactive. These inactive data rows can be compressed into one optimi

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Tags: des style blog http color io os using ARThis series of articles is a summary of some of the new features of Oracle database 12c, including database management, RMAN, high availability, and performance tuning, Syed Jaffer Hus

table is automatically added to thein-memory Area, compression and other genera.Optimizer_inmemory_awareSaidOptimizerWhether theinmemorySupport. Inmemory_sizeis a static parameter, the change requires that the instance be restarted to take effect. provided to in memory is used from SGA is allocated in the space, dividing a single area of memory to im-memeory function using . Called in-memory area , in-memory the larger the memory area, the better, so that more data is stored in memory, in-

Recovery24.2 cold and recovery in non-archive modeSteps to 24.2.1 ColdRecovery of 24.2.2 Cold prepared24.2.3 Missing Redo log File recovery method24.3 Archive mode and non-archive mode24.3.1 Setting the archive mode of the database24.3.2 Setting the archive process parameters24.3.3 Managing archive files and archive directories24.4 steps to manually hot-standby a database24.5 How to deal with database crashes during hot standby24.6 Principle of hot p

Summary of the new features of Oracle 12c on business impact (1) 1. invisible fields In Oracle 11g R1, Oracle introduces some good enhancement features in the form of invisible indexes

Dangdang page Link: Http://product.dangdang.com/23625712.html The 1th chapter Oracle Database Basic knowledge1.1 What is a relational database1.1.1 Relational Database modelFounder of 1.1.2 Relational data model1.2 Oracle Database Development historyThe beginning of 1.2.1 Co

to ASM: sql > ALTER DATABASE MOVE datafile '/u00/data/users_01.dbf ' to ' +dg_data '; migrating data files from one ASM disk group to another ASM disk group : SQL> ALTER DATABASE MOVE DataFile ' +dg_data/dbname/datafile/users_01.dbf ' to ' +dg_data_02 '; overwrites the data file with the same name if it already exists in the new path: SQL>

-----. 1 Oracle Oinstall 272637952 may 04:30 system01.dbf-rw-r-----. 1 Oracle Oinstall 67117056 may 07:02 temp01.dbf-rw-r-----. 1 Oracle Oinstall 104865792 may 04:30 undotbs01.dbf-rw-r-----. 1 Oracle Oinstall 14426112 may 04:10 users01.dbf-rw-r-----. 1 Oracle Oinstall 525107

------------------------- ------------------------- -------- ---------- -----------P_andy idx_pandy_id unusable 0 1--Rebuilding the indexsql> ALTER index IDX_PANDY_ID rebuild;Index altered.--View index statusSql> Select Table_name,index_name,status,blevel,leaf_blocks from user_indexes where index_name = ' IDX_PANDY_ID ';table_name index_name STATUS Blevel leaf_blocks------------------------- ------------------------- -------- ---------- -----------P_andy idx_pandy_id VALID 0 1--Truncate multiple

Oracle 12C new Features-extended data type, in 12c, the size of data types such as VARCHAR2, NAVARCHAR2, and raw are extended from 4K and 2K bytes to 32K bytes, compared to earlier versions. As long as possible, the size of the extended character decreases the use of the LOB

New Features of Oracle DB 12c: raw device bare devices are no longer supported, oracle12c New Feature of Oracle DB 12c: raw device is no longer supported. Reference:Announcement of De-S

One, DB default character set Al32utf8Specify the database character set when you create the database. Starting from Oracle Database 12c Release 2, if you use Oracle Universal Installer (OUI) or

Summary of new features in Oracle 12C SQL Multiple indexes on the same field Before Oracle 12c R1, a field cannot have multiple indexes in any form. Some may wonder why a field usually requires multiple indexes. In fact, there are

Add columns with default values in Oracle tables (including new 12C features) and oracle12c This is a problem that I have been paying attention. 11G has been improved on this issue, and 12C has some new

(2, Seq_session.nextval); SQL>Select* fromSCOTT.GTT; ID Seq_number---------- ----------1 3 2 4SQL>Continue the test.--end of session, sequence value will be resetSql>conn tiger/Tigersql>drop synonym GTT; SQL>drop synonym seq_session; SQL>create synonym GTT forSCOTT.GTT; SQL>create synonym Seq_session forscott.seq_session; SQL>Select* fromgtt;no rows Selectedsql>sql> INSERT INTO GTT values (1, Seq_session.nextval); sql> INSERT into GTT values (2, Seq_session.nextval);-I

Oracle 12C r2-new features-pdb disk I/O (iops,mbps) resource managementIn previous versions, there was no easy way to control the amount of disk I/O used by a single PDB. As a result, a PDB may run out of disk I/O and affect the performance of other PDB in the same instance. The Or