Guang Mei wrote:
>
> Hi,
>
> According to book "Oracle Performance Tuning 101" (By Gaja K. Vaidyanatha),
> page 316:
>
> Oracle SGA Component Percent Memory Allocation
>
> Database buffer cache ~ 80
> Shared Pool area ~ 12
> ...
>
> This means 80% of SGA should be allocated to "Database buffer cache". Now I
> have an oracle 8173 db running on Sun 2.8:
>
> SQL> select * from v$sga;
> NAME VALUE
> -------------------- ----------
> Fixed Size 73888
> Variable Size 278183936
> Database Buffers 409600000
> Redo Buffers 1040384
>
> How would I know if my "Variable Size" is too large or not? Which tables or
> views that I can query to find if my shared_pool_area is set properly? BTW,
> the db performance has been fine so far for about a year.
>
> TIA.
>
> Guang Mei
>
Whatever the quality of a book, never believe ratios. Sizes are HIGHLY
dependent on what you do, and how you do it. If performance is fine,
keep it as it is.
--
Regards,
Stephane Faroult
Oriole Software
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Stephane Faroult
INET: sfaroult_at_oriole.com
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Received on Wed Jan 22 2003 - 15:09:37 CST
