Создал две абсолютно одинаковых таблицы в оракле и firebird с одним полем типа number/numeric
Сделал два цикла на вставку милиона записей и там и там.

oracle
////////////////
n := 0;
while n<=10000000 loop
insert into t(t) values(n);
n:=n+1;
end loop;

////////////

firebird
////////////
n = 0;
while (n <= 10000000) do
begin
insert into t_new(id) values(:n);
n = n + 1;
end
/////////

FireBird сделал это за 4 сек 063 мс
оракл сделал это за 235 сек 063 мс

потом попрорбовал обновить эти записи
оракл сдедал это за 265 сек
firebird за 19 с


Почему такая большая разница по скорости. Неужели Firebird маленький да удаленький.

init.ora

#
# Copyright (c) 1991, 2000 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 = "example"

instance_name = example

service_names = example

db_files = 1024

control_files = ("D:\oracle\oradata\example\control01.ctl", "D:\oracle\oradata\example\control02.ctl", "D:\oracle\oradata\example\control03.ctl")

open_cursors = 300
max_enabled_roles = 30
db_file_multiblock_read_count = 8

db_block_buffers = 2464

shared_pool_size = 15728640

large_pool_size = 614400
java_pool_size = 0

log_checkpoint_interval = 10000
log_checkpoint_timeout = 1800

processes = 150

parallel_max_servers = 5

log_buffer = 32768

#audit_trail = true # if you want auditing
#timed_statistics = true # if you want timed statistics
max_dump_file_size = 10240 # limit trace file size to 5M each

# Uncommenting the line below will cause automatic archiving if archiving has
# been enabled using ALTER DATABASE ARCHIVELOG.
# log_archive_start = true
# log_archive_dest_1 = "location=D:\oracle\oradata\example\archive"
# log_archive_format = %%ORACLE_SID%%T%TS%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, RBS3, RBS4, RBS5, RBS6 )

# Global Naming -- enforce that a dblink has same name as the db it connects to
global_names = true

# 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

oracle_trace_collection_name = ""
# define directories to store trace and alert files
background_dump_dest = D:\oracle\admin\example\bdump
#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 = D:\oracle\admin\example\udump

db_block_size = 8192

remote_login_passwordfile = exclusive

os_authent_prefix = ""

# The following parameters are needed for the Advanced Replication Option
job_queue_processes = 4
job_queue_interval = 60
open_links = 4

distributed_transactions = 10
compatible = 8.1.0
sort_area_size = 65536
sort_area_retained_size = 65536

В смысле, не понял!!