ORACLE 12C In-Memory组件学习笔记

12.1.0.2版本
[oracle@localhost ~]$ sqlplus

SQL*Plus: Release 12.1.0.2.0 Beta on Thu Apr 24 21:39:43 2014

Copyright (c) 1982, 2014, Oracle. All rights reserved.


Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Beta
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> select * from v$version;

BANNER CON_ID
-------------------------------------------------------------------------------- ----------
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Beta 0
PL/SQL Release 12.1.0.2.0 - Beta 0
CORE 12.1.0.2.0 Beta 0
TNS for Linux: Version 12.1.0.2.0 - Beta 0
NLSRTL Version 12.1.0.2.0 - Beta 0
关于In-Memory组件
SQL> select parameter,value from v$option where parameter like 'In-Memory%'

PARAMETER VALUE
---------------------------------------------------------------- -------------
In-Memory Column Store TRUE
In-Memory Aggregation TRUE
关于inmemory参数
SQL> select NAME,value,DESCRIPTION from v$parameter where NAME like 'inmemory%'

NAME VALUE
-------------------- --------------------
DESCRIPTION
---------------------------------------------------
inmemory_size 0
size in bytes of in-memory area

inmemory_clause_defa
ult
Default in-memory clause for new tables

inmemory_force DEFAULT
Force tables to be in-memory or not

inmemory_query ENABLE
Specifies whether in-memory queries are allowed
启用In-Memory功能
SQL> show parameter inmemory;

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
inmemory_clause_default string
inmemory_force string DEFAULT
inmemory_query string ENABLE
inmemory_size big integer 0

SQL> alter system set inmemory_size=200M scope=spfile;

System altered.

SQL> shutdown immediate
Pluggable Database closed.
SQL> startup
Pluggable Database opened.
SQL> show parameter inmemory;

NAME TYPE VALUE
------------------------------------ ----------- ----------------------
inmemory_clause_default string
inmemory_force string DEFAULT
inmemory_query string ENABLE
inmemory_size big integer 200M
创建测试表
SQL> create table t_xifenfei_in_memory as select * from dba_objects;

Table created.

SQL> select TABLE_NAME,INMEMORY_PRIORITY,INMEMORY_DISTRIBUTE,INMEMORY_COMPRESSION from user_tables;

TABLE_NAME INMEMORY INMEMORY_DISTRI INMEMORY_COMPRESS
------------------------------ -------- --------------- -----------------
T_XIFENFEI_IN_MEMORY

SQL> alter table T_XIFENFEI_IN_MEMORY inmemory;

Table altered.

SQL> select TABLE_NAME,INMEMORY_PRIORITY,INMEMORY_DISTRIBUTE,INMEMORY_COMPRESSION from user_tables;

TABLE_NAME INMEMORY INMEMORY_DISTRI INMEMORY_COMPRESS
------------------------- -------- --------------- -----------------
T_XIFENFEI_IN_MEMORY NONE AUTO DISTRIBUTE FOR QUERY

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