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Re: Multiple block sizes

From: Wolfgang Breitling <>
Date: Thu, 25 Sep 2003 10:59:44 -0800
Message-ID: <>

I'm not there yet, at least not in production, but I am looking forward to putting thousands of small (actually empty) tables and indexes of Peoplesoft Financials into a 2K tablespace. Not that they will ever occupy any room in the buffer pool, but just for the savings in disk space (and backup time until we go to RMAN and incremental backups). 10,000 tables occupying 2 2K blocks instead of 2 8K blocks is a savings of almost 120M. In order not to waste the 2K buffer pool I'll find a few suitable lookup tables that could benefit from what will then be a keep pool.

At 07:44 AM 9/25/2003 -0800, you wrote:
>I think putting your small tables to 2K block size is quite pointless
>(unless you have tens of thousands of these tables continously in buffer
>----- Original Message -----
>From: <>
>To: <>Multiple recipients of list ORACLE-L
>Sent: Wednesday, September 24, 2003 8:54 PM
>Subject: RE: Multiple block sizes
>I have little bit experience on that. I am keeping indexes in 32K
>block 'cause Oracle access indexes sequentially and placing indexes in
>large block would help in reducing IO. All the tables are in 8K block
>size but you can think about putting small tables in 2K or 4KB block size
>to better utilize your RAM. We are on AIX 5.1 , Oracle 9202.

Wolfgang Breitling
Oracle7, 8, 8i, 9i OCP DBA
Centrex Consulting Corporation

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Author: Wolfgang Breitling

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Received on Thu Sep 25 2003 - 13:59:44 CDT

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