Best config for init.ora

Question

Hi,
I am using
OS:win 2k8 server 32 bit
Oracle Database:11g EE 11.2.0.1.0
RAM: 8GB
Like to now what is the best config parmaters for a OLTP with maximum of 100 users at the time
When i use the DBCA command i got the template of init.ora
where i am not seeing anything for PGA or SGA.
if i run the
SQL> show parameter db_cache_size
NAME                                 TYPE        VALUE
db_cache_size                        big integer 0
SQL> show sga
Total System Global Area  778387456 bytes
Fixed Size                  1374808 bytes
Variable Size             486540712 bytes
Database Buffers          285212672 bytes
Redo Buffers                5259264 bytes
SQL> show parameter target
NAME                                 TYPE        VALUE
archive_lag_target                   integer     0
db_flashback_retention_target        integer     1440
fast_start_io_target                 integer     0
fast_start_mttr_target               integer     0
memory_max_target                    big integer 1232M
memory_target                        big integer 1232M
parallel_servers_target              integer     16
pga_aggregate_target                 big integer 0
sga_target                           big integer 0
INIT.ORA(DBCA Configuration)
db_block_size=8192
open_cursors=300
db_domain=""
db_name=mydb
control_files=
db_recovery_file_dest=
db_recovery_file_dest_size=5218762752
compatible=11.2.0.0.0
diagnostic_dest=
memory_target=1287651328
processes=150
audit_file_dest=
audit_trail=db
remote_login_passwordfile=EXCLUSIVE
dispatchers="(PROTOCOL=TCP) (SERVICE=MYDBXDB)"
undo_tablespace=UNDOTBS1
Is the current setting is good or i need to fine tune my parameters
Max of 20 million records from max of 100 users per day
Your suggestions would be helpful for my configutations
Thanks in advance.

Answer 1

You cant generalize performance configuration. If it can be oracle would have don it. Fine tuning of parameter values is a on going process. Its not like you set it one and its done. You need to monitor it constantly and tune it on need basis.
Said that, the first thing that caught me is the setting of SGA_TARGET and PGA_AGGREGATE_TARGET. Both are set to 0 meaning Automated memory management is turned off.
Run the following two query
select name
     , value
  from v$parameter
where upper(name) = 'PGA_AGGREGATE_TARGET'
    or upper(name) = 'WORKAREA_SIZE_POLICY'
    or upper(name) like '%\_AREA\_SIZE' escape '\';
select name
     , value
  from v$parameter
where upper(name) in ( 
                          'SGA_TARGET'
                        , 'DB_CACHE_SIZE'
                        , 'SHARED_POOL_SIZE'
                        , 'LARGE_POOL_SIZE'
                        , 'JAVA_POOL_SIZE'
                        , 'STREAMS_POOL_SIZE'
This will indicate the memory related parameters that are manually set in your environment.