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Question
SGA.. fixed size and variable size
Hello,
I am trying to understand how Oracle uses memory structure for tuning purpose. For that I ran a simple select against V$sga and like to know:
- What is the fixed size?
- What is the variable size?
area in the SGA.
How are these two areas in the SGA calculated? And, what is there use?
Thanks.
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by: mohammadzahidPosted on 2006-10-24 at 14:05:21ID: 17799407
Sorry, here is the output of the V$SGA from my local XP system. Values represented are default values of Oracle when created/installed.
SQL> select * from V$sga;
NAME VALUE
-------------------- ---------
Fixed Size 454644
Variable Size 109051904
Database Buffers 25165824
Redo Buffers 667648
total SGA size SQL> select sum(bytes) from V$sgastat;
SUM(BYTES)
----------
135328756