Oracle Memory usage estimation

Any formula or good document for memory usgae estimation of Oracle 9i Database server (such as PGA/SGA memory usage, memory for dictinonary/library cache, NET connection, SQL connection, ...) ???

Many thanks !!!
Shirley

Hi,

Check out this script... maybe it'll help.

SET LINESIZE 145
SET PAGESIZE 9999
SET FEEDBACK off
SET VERIFY off

COLUMN bytes FORMAT 999,999,999,999
COLUMN percent FORMAT 999.99999

break on report

compute sum of bytes on report
compute sum of percent on report

SELECT
a.name
, a.bytes
, a.bytes/(b.sum_bytes*100) Percent
FROM sys.v_$sgastat a
, (SELECT SUM(value)sum_bytes FROM sys.v_$sga) b
ORDER BY bytes DESC
/

Cheers
Oracbase

I think the query should be like this:

SELECT
a.name
, a.bytes
, (a.bytes/b.sum_bytes)*100 Percent
FROM sys.v_$sgastat a
, (SELECT SUM(value)sum_bytes FROM sys.v_$sga) b
ORDER BY bytes DESC;


-Raja