Re: Oracle Tnuning---Block Size, How much difference?

Well, if you did not alter things like db_block_buffers, you buffers are half

as well, so that does make a change in performance! Why did you half it anyway? Usually bigger performs better, tho you cannot take this to unlimited.

Sean Zhang wrote:

> Hello, Everybody,
>
> Recently I upgraded our system from Oracle 8 ->Oracle 8i,
> ( in Sun E3000 with Solaris 2.6).
> During the upgrade, I used Export utilities to build a whole new
> database, and the block size was also changed from 4K-> 2K.
> Now I feel the new system is a bit slower than the old system. I read
> some technical books , which say bigger block size could dramatically
> increase the performace, but Oracle documentations stress the
> default block size (2 K) is optimal for our system. I don't know which is
> true
> OR whether the change of block size is the problem making the new
> system slower.
>
> Any suggestions and advices are greatly appreciated.
>
> Sean Zhang
> mailto:sean_at_cnfei.com

--
Met vriendelijke groet,
kind regards,

Frank van Bortel
Technical consultant Oracle
V&L Informatica BV

Work                           Home
Postbus 545                    Hunzestraat 4
7500 AM Enschede               7555 WB Hengelo
(31)53.434.1500                (31)74.242.5046