http://www.ixora.com.au/tips/creation/block_size.htm
provides a good explanation of how and why to select a large db block size//
> ----------
> From: Nirmal Kumar Muthu Kumaran[SMTP:[EMAIL PROTECTED]]
> Reply To: [EMAIL PROTECTED]
> Sent: Tuesday, June 19, 2001 3:30 PM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: How to size db_block_size?
>
> Hi Justin,
>
> A larger data block size provides greater efficiency in disk and memory
> I/O (access and storage of data). Such cases include:
>
> a) Oracle is on a large computer system with a large amount of memory and
> fast disk drives. For example, databases controlled by mainframe computers
> with vast hardware resources typically use a data block size of 4K or
> greater.
>
> b) The operating system that runs Oracle uses a small operating system
> block size. For example, if the operating system block size is 1K and the
> data block size matches this, Oracle may be performing an excessive amount
> of disk I/O during normal operation. For best performance in this case, a
> database block should consist of multiple operating system blocks.
>
> Hope that this would helps you.
>
> Nirmal.
>
> -----Original Message-----
> From: Justin Coleman [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, June 19, 2001 10:06 AM
> To: Multiple recipients of list ORACLE-L
> Subject: How to size db_block_size?
>
> Dear All,
>
> Is there a recommended approach on how to decide on the
> db_block_size for
> your database? I am looking to create a database that during the day will
>
> be used for light OLTP, but during the day and night will have heavish
> batch
> jobs. Therefore I was intent on using 8k or 16k blocks. Most likely 8k
> blocks. But is there an approach to actually chosing the correct
> db_block_size?
>
> Cheers for any help in advance.
> Justin
>
>
>
>
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> Author: Justin Coleman
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