Re: 'shared pool'

From: Mladen Gogala <mladen_at_wangtrading.com>
Date: Tue, 07 Oct 2003 14:19:24 -0800
Message-ID: <F001.005D24C2.20031007141924@fatcity.com>

Not so on my instance.

SQL> select sum(bytes) from v$sgastat
  2 where pool='shared pool';  

SUM(BYTES)

---

 251658240  

SQL> show parameter shared_pool  

NAME                                 TYPE        VALUE
------------------------------------ -----------
------------------------------
shared_pool_reserved_size            big integer 10905190
shared_pool_size                     big integer 218103808

SQL> select 251658240-218103808 from dual;  

251658240-218103808

---

           33554432  

SQL> show parameter db_cache_size  

NAME                                 TYPE        VALUE
------------------------------------ -----------
------------------------------
db_cache_size                        big integer 419430400

SQL> On Tue, 2003-10-07 at 17:54, bulbultyagi_at_now-india.net.in wrote:
> List please try out the following :
> 1. select sum(bytes) from v$sgastat where pool='shared pool';
>
> 2. find out the size of the shared pool you have specified in your
> parameter files.
>
> 3. subtract the two values
>
> 4. When I do the same as above the difference is exactly equal to my
> db_cache_size.
>
> So does this mean that if I allocate x MB to my buffer cache, Oracle
> allocates that x mb for the buffer cache , and an additional x mb for
> managing the buffer cache and places it in the shared pool ?
>
> Please explain this to me.
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net

-- 
Mladen Gogala
Oracle DBA




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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Mladen Gogala
  INET: mladen_at_wangtrading.com

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Received on Tue Oct 07 2003 - 17:19:24 CDT