提高Oracle的查询统计速度方法简介

CREATE TABLESPACE WXGL_DATA1 DATAFILE 'WXGL_DATA1.ORA' SIZE 500M ONLINE;

ALTER TABLESPACE TEMPORARY_DATA ADD DATAFILE 'TMP2ORCL.ORA' SIZE 40M;

ALTER TABLESPACE ROLLBACK_DATA ADD DATAFILE 'RBS2ORCL.ORA' SIZE 40M;

CREATE USER ZBGL IDENTIFIED BY ZBGL; 

GRANT DBA TO ZBGL; 

ALTER USER ZBGL DEFAULT TABLESPACE WXGL_DATA1 TEMPORARY TABLESPACE TEMPORARY_DATA;

SELECT SEGMENT_NAME FROM DBA_ROLLBACK_SEGS WHERE INITIAL_EXTENT < 512000 AND 

UPPPER(OWNER) = 'PUBLIC'; 

SELECT UPPER(STATUS) FROM DBA_ROLLBACK_SEGS WHERE UPPER(SEGMENT_NAME) = ''

ALTER ROLLBACK SEGMENT RB1 OFFLINE;

ALTER ROLLBACK SEGMENT RB2 OFFLINE; 

ALTER ROLLBACK SEGMENT RB3 OFFLINE;

ALTER ROLLBACK SEGMENT RB4 OFFLINE; 

ALTER ROLLBACK SEGMENT RB5 OFFLINE;

DROP ROLLBACK SEGMENT RB1;

DROP ROLLBACK SEGMENT RB2; 

DROP ROLLBACK SEGMENT RB3; 

DROP ROLLBACK SEGMENT RB4;

DROP ROLLBACK SEGMENT RB5;

CREATE PUBLIC ROLLBACK SEGMENT RB1 TABLESPACE ROLLBACK_DATA 

　 STORAGE (INITIAL 512000 NEXT 512000 MAXEXTENTS 121);

CREATE PUBLIC ROLLBACK SEGMENT RB2 TABLESPACE ROLLBACK_DATA 

　 STORAGE (INITIAL 512000 NEXT 512000 MAXEXTENTS 121);

CREATE PUBLIC ROLLBACK SEGMENT RB3 TABLESPACE ROLLBACK_DATA 

　 STORAGE (INITIAL 512000 NEXT 512000 MAXEXTENTS 121); 

CREATE PUBLIC ROLLBACK SEGMENT RB4 TABLESPACE ROLLBACK_DATA

　 STORAGE (INITIAL 512000 NEXT 512000 MAXEXTENTS 121); 

CREATE PUBLIC ROLLBACK SEGMENT RB5 TABLESPACE ROLLBACK_DATA

　 STORAGE (INITIAL 512000 NEXT 512000 MAXEXTENTS 121); 

ALTER ROLLBACK SEGMENT RB1 ONLINE;

ALTER ROLLBACK SEGMENT RB2 ONLINE;

ALTER ROLLBACK SEGMENT RB3 ONLINE;

ALTER ROLLBACK SEGMENT RB4 ONLINE;

ALTER ROLLBACK SEGMENT RB5 ONLINE; 

COMMIT; 

KCB='CREATE TABLE QC_KCB( '

　 +' CKNM NUMBER(8) ,' 

　 +' QCNM NUMBER(10) ,'

　 +' CKKC NUMBER(12,2),'

　 +' SNCKKC NUMBER(12,2),'

　 +' LDJ NUMBER(12,2),' 

　 +' BZ VARCHAR(100),'

　 +' PRIMARY KEY(CKNM,QCNM))'

　 +' TABLESPACE WXGL_DATA1 ' ; （大数据量的库存表等放在WXGL_DATA1) 

QCFL = 'CREATE TABLE QC_QCFL ' 

　 + '(FLBH NUMBER(2) PRIMARY KEY,' 

　 + ' FLMC VARCHAR(20) '

　 + ' ) '

　 +' TABLESPACE WXGL_DATA2 ' ;(其他表放在WXGL_DATA2）

#

# $Header: init.ora 1.2 94/10/18 16:12:36 gdudey Osd 
$ init.ora Copyr (c) 1991 Oracle

# 
##########################################################

# 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.
################################################################# 

db_name = oracle 

db_files = 20 

control_files = C:\ORAWIN95\DATABASE\ctl1orcl.ora 

compatible = 7.3.0.0.0 

db_file_multiblock_read_count = 8   # INITIAL

# db_file_multiblock_read_count = 8 　 # SMALL

# db_file_multiblock_read_count = 16　 # MEDIUM

# db_file_multiblock_read_count = 32 　 # LARGE 

db_block_buffers = 200　# INITIAL

# db_block_buffers = 200# SMALL

# db_block_buffers = 550 　 # MEDIUM 

# db_block_buffers = 3200 　# LARGE 

shared_pool_size = 3500000 # INITIAL

# shared_pool_size = 3500000　 # SMALL 

# shared_pool_size = 6000000　 # MEDIUM

# shared_pool_size = 9000000　 # LARGE 

log_checkpoint_interval = 10000

processes = 50 # INITIAL 

# processes = 50　 # SMALL 

# processes = 100 # MEDIUM 

# processes = 200 # LARGE 

dml_locks = 100 　# INITIAL

# dml_locks = 100 # SMALL 

# dml_locks = 200 # MEDIUM 

# dml_locks = 500 # LARGE

log_buffer = 8192 # INITIAL

# log_buffer = 8192　 # SMALL

# log_buffer = 32768　# MEDIUM 

# log_buffer = 163840 # LARGE

sequence_cache_entries = 10　 # INITIAL

# sequence_cache_entries = 10 # SMALL 

# sequence_cache_entries = 30 # MEDIUM

# sequence_cache_entries = 100# LARGE

sequence_cache_hash_buckets = 10　 # INITIAL

# sequence_cache_hash_buckets = 10 # SMALL

# sequence_cache_hash_buckets = 23 # MEDIUM

# sequence_cache_hash_buckets = 89 # LARGE

# 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 5 Meg each

# log_archive_start = true # if you want automatic archiving

log_archive_dest=%ORACLE_HOME%\DATABASE\ARCHIVE

# define directories to store trace and alert files 

background_dump_dest=%RDBMS73%\trace

user_dump_dest=%RDBMS73%\trace

db_block_size = 2048 

snapshot_refresh_processes = 1 

remote_login_passwordfile = shared