help about oralce parameters
We have an Oracle 8174 database running on COMPAQ GS160.
It is an OLTP server which has 400--500 sessions .
It has 50--70 active sessions .
Our server has 8 CPU and 8GB Mem.
Tonight we will upgrade our COMPAQ GS160 from 8 CPU 8GB Mem to 16CPU 16 GB Mem.
But we will change our database parameters later.
The fellowing is our pfile now (8 CPU and 8GB Mem).
Would anybody give me some advise of our parameters later (16 CPU and 16GB Mem). Thanks !
initSID.ora
#
# Copyright (c) 1991, 1998 by Oracle Corporation
#
##############################################################################
# Example INIT.ORA file
#
# This file is provided by Oracle Corporation to help you customize
# your RDBMS installation for your site. Important system parameters
# are discussed, and example settings given.
#
# Some parameter settings are generic to any size installation.
# For parameters that require different values in different size
# installations, three scenarios have been provided: SMALL, MEDIUM
# and LARGE. Any parameter that needs to be tuned according to
# installation size will have three settings, each one commented
# according to installation size.
#
# Use the following table to approximate the SGA size needed for the
# three scenarious provided in this file:
#
# -------Installation/Database Size------
# SMALL MEDIUM LARGE
# Block 2K 4500K 6800K 17000K
# Size 4K 5500K 8800K 21000K
#
# To set up a database that multiple instances will be using, place
# all instance-specific parameters in one file, and then have all
# of these files point to a master file using the IFILE command.
# This way, when you change a public
# parameter, it will automatically change on all instances. This is
# necessary, since all instances must run with the same value for many
# parameters. For example, if you choose to use private rollback' segments,
# these must be specified in different files, but since all gc_*
# parameters must be the same on all instances, they should be in one file.
#
# INSTRUCTIONS: Edit this file and the other INIT files it calls for
# your site, either by using the values provided here or by providing
# your own. Then place an IFILE= line into each instance-specific
# INIT file that points at this file.
#
# NOTE: Parameter values suggested in this file are based on conservative
# estimates for computer memory availability. You should adjust values upward
# for modern machines.
#
###############################################################################
db_name = "ahbill"
instance_name = ahbill
service_names = ahbill
control_files = ("/devices/rvol/jfdbdg/v2_control1", "/devices/rvol/jfdbdg/v2_control2", "/devices/rvol/jfdbdg/v2_control3")
open_cursors = 1000
max_enabled_roles = 30
#DB_BUFFERS=858849280
db_block_buffers =65000
db_block_size = 16384
#shared_pool_size=300M
shared_pool_size = 614572800
large_pool_size = 15728640
java_pool_size = 20971520
log_checkpoint_interval = 10000
log_checkpoint_timeout = 1800
enqueue_resources = 8192
#processes = 300
processes = 600 #modified by xienan at 13 Aug,2002
#log_buffer = 16M
log_buffer = 16777216
# audit_trail = false # if you want auditing
# timed_statistics = false # if you want timed statistics
# max_dump_file_size = 10000 # limit trace file size to 5M each
# Uncommenting the lines below will cause automatic archiving if archiving has
# been enabled using ALTER DATABASE ARCHIVELOG.
# log_archive_start = true
# log_archive_dest_1 = "location=/array/orabill/app/oracle/admin/ahbill/arch"
# log_archive_format = arch_%t_%s.arc
# If using private rollback segments, place lines of the following
# form in each of your instance-specific init.ora files:
#rollback_segments = ( RBS0, RBS1, RBS2 )
rollback_segments = (RBS00,RBS01,RBS02,RBS03,RBS04,RBS05,RBS09,RBS10,RBS11,RBS12,RBS13,RBS14,RBS15,RBS16,RBS17,RBS18,RBS 19)
# Global Naming -- enforce that a dblink has same name as the db it connects to
# global_names = false
# Uncomment the following line if you wish to enable the Oracle Trace product
# to trace server activity. This enables scheduling of server collections
# from the Oracle Enterprise Manager Console.
# Also, if the oracle_trace_collection_name parameter is non-null,
# every session will write to the named collection, as well as enabling you
# to schedule future collections from the console.
# oracle_trace_enable = true
# define directories to store trace and alert files
background_dump_dest = /array/orabill/app/oracle/admin/ahbill/bdump
core_dump_dest = /array/orabill/app/oracle/admin/ahbill/cdump
#Uncomment this parameter to enable resource management for your database.
#The SYSTEM_PLAN is provided by default with the database.
#Change the plan name if you have created your own resource plan.# resource_manager_plan = system_plan
user_dump_dest = /array/orabill/app/oracle/admin/ahbill/udump
remote_login_passwordfile = none
os_authent_prefix = none
# The following parameters are needed for the Advanced Replication Option
#job_queue_processes = 4
#job_queue_interval = 60
distributed_transactions = 250
open_links = 4
#mts_dispatchers = "(PROTOCOL=TCP)(PRE=oracle.aurora.server.SGiopServer)"
# Uncomment the following line when your listener is configured for SSL
# (listener.ora and sqlnet.ora)
# mts_dispatchers = "(PROTOCOL=TCPS)(PRE=oracle.aurora.server.SGiopServer)"
#mts_dispatchers = "(protocol=TCP)"
db_files = 254
compatible = "8.1.0"
sort_area_size = 2048000
sort_area_retained_size = 20480