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What is variable size when showing SGA?
Variable portion
The variable portion is called variable because its size (measured in bytes) can be changed.
The variable portion consists of:
• large pool (optional)
Provides working space for rman (although rman will also work without large pool).
• Shared pool The shared pool is used for objects that are shared among all users. For example: table definitions, PL/SQL definitions, cursors and so on.



  
Total Answers and Comments: 2 Last Update: February 01, 2009     Asked by: Ravi Prakash Pichika 
  
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December 27, 2008 06:05:22   #1  
dheeraj narula Member Since: December 2008   Contribution: 1    

RE: What is variable size when showing SGA?
Dynamic SGA allows Oracle to set at run time limits on how much virtual memory
Oracle uses for the SGA.

So under dynamic(variable ) SGA portion in intialization parameter file the parameter
SGA_MAX_SIZE is set i.e. the size of variable SGA can be max upto the limit defined in this parameter.

It can be checked by writing

Select * from v$parameter where name 'sga_max_size';


Please correct me if i am wrong at all.

 
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January 31, 2009 13:22:17   #2  
sairavi.dba Member Since: January 2009   Contribution: 1    

RE: What is variable size when showing SGA?
In SGA variable size is combination of shared pool Java pool and Large Pool

SQL> show sga;

Total System Global Area 612368384 bytes
Fixed Size 1250428 bytes
Variable Size 171969412 bytes (shardpool+java pool + large pool)
Database Buffers 432013312 bytes
Redo Buffers 7135232 bytes

but java pool and large pool are optional one.

 
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 Related Questions

Variable portionThe variable portion is called variable because its size (measured in bytes) can be changed. The variable portion consists of: • large pool (optional)Provides working space for rman 
Latest Answer : In SGA, variable size is combination of shared pool, Java pool and Large PoolSQL> show sga;Total System Global Area  612368384 bytesFixed Size                  ...
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give the dbms_pipe commands in oracle of there execution,which are used to send & recieve messages what is the max size can sent at one go 
Latest Answer : dbms_pipe is a IPC methodology which allows processes to communicate with each other using pipes. The important functions/procedures in this package are(1) CREATE_PIPE to create a new pipe ==> dbms_pipe.create_pipe(pipename) where pipename can be Oracle ...
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