Re: recycle and keep buffer in other tablespace block sizes

From: <J.Velikanovs_at_alise.lv>
Date: Mon, 2 Aug 2004 19:33:55 +0300
Message-ID: <OF16E6EB1E.F3E17989-ONC2256EE4.005AED31-C2256EE4.005BBF22@alise.lv>

I have returned to this question.
Have retested issue and answer is:
Even if you set to non default block size table pool to keep it will go to pool with nondefault block size (in our case to db_2k_cache_size). I tried to create table with nondefault blocksize (2k) in 8k database, then I have commented parameter db_2k_cache_size and you can see results below.
My test prove that 2K table cant be cached in 8K pool, so it will not go to keep pool in any case.
Jurijs

SYS:TEST5> @par
Parameters vai dala no ta :db_2k_cache_size

NAME                                     VALUE
---------------------------------------- -----
db_2k_cache_size                         0

SYS:TEST5> select * from test2k;
select * from test2k

*

ERROR at line 1:
ORA-00379: no free buffers available in buffer pool DEFAULT for block size 2K

SYS:TEST5> select * from dba_data_files; select * from dba_data_files

*

ERROR at line 1:
ORA-00379: no free buffers available in buffer pool DEFAULT for block size 2K

SYS:TEST5>

---

SYS:TEST5> @par
Parameters vai dala no ta :db_2k_cache_size

NAME                                     VALUE
---------------------------------------- --------
db_2k_cache_size                         16777216

SYS:TEST5> create tablespace test2k datafile '/u01/oradata/TEST5/test2k01.dbf' size 10M blocksize 2K ;

Tablespace created.

SYS:TEST5> create table test2k (n number) tablespace test2k;

Table created.

SYS:TEST5> insert into test2k values (1);

1 row created.

SYS:TEST5> commit;

Commit complete.

SYS:TEST5> select * from test2k;

         N

---

         1

1 row selected.

SYS:TEST5> Jurijs
9268222

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http://otn.oracle.com/ocm/jvelikanovs.html

"Juan Carlos Reyes Pacheco" <jreyes_at_dazasoftware.com> Sent by: oracle-l-bounce_at_freelists.org
21.07.2004 16:57
Please respond to oracle-l  

        To:     <oracle-l_at_freelists.org>
        cc: 
        Subject:        recycle and keep buffer in other tablespace block 

sizes

Hi list I'm investigating this,
if your default blocksize is 8k, and you create a tables using 2k block you have the
ALTER SYSTEM SET DB_2K_CACHE_SIZE = 100M; to set the size for this block cache  

But how do you set the keep and recycle size for this block size There are none of this parameter.
ALTER SYSTEM SET DB_2K_KEEP_CACHE_SIZE = 1M; ALTER SYSTEM SET DB_2K_RECYCLE_CACHE_SIZE = 1M;   Thank you  

Juan Carlos Reyes Pacheco
OCP

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Received on Mon Aug 02 2004 - 11:38:42 CDT