Home > Database > Mysql Tutorial > body text

Oracle设置Shared Pool的大小

WBOY
Release: 2016-06-07 16:45:33
Original
1366 people have browsed it

在Oracle 10G或者11G版本中,如何合理设置shared pool大小,对Oracle数据库的性能影响很大。

在Oracle 10G或者11G版本中,如何合理设置shared pool大小,,对Oracle数据库的性能影响很大。

Shared Pool的大小设置规则如下:

1.查到shared pool设置的合理值,语句如下:

select 'Shared Pool' component,

shared_pool_size_for_estimate estd_sp_size,

estd_lc_time_saved_factor parse_time_factor,

case

when current_parse_time_elapsed_s + adjustment_s

0

ELSE

current_parse_time_elapsed_s + adjustment_s

END response_time

FROM (select shared_pool_size_for_estimate,

shared_pool_size_factor,

estd_lc_time_saved_factor,

a.estd_lc_time_saved,

e.VALUE / 100current_parse_time_elapsed_s,

c.estd_lc_time_saved - a.estd_lc_time_saved adjustment_s

from v$shared_pool_advice a,

(select * from v$sysstat where NAME = 'parse time elapsed') e,

(select estd_lc_time_saved

from v$shared_pool_advice

where shared_pool_size_factor = 1) c);

2.设置上个SQL语句中查到的PARSE_TIME_FACTOR首次等于1的记录所在行的ESTD_SP_SIZE的值为shared pool。

3.设置语句如下:

alter system set shared_pool_size=XXX scope=spfile;或者alter system set shared_pool_size=XXX scope=both;

在CentOS 6.4下安装Oracle 11gR2(x64)

Oracle 11gR2 在VMWare虚拟机中安装步骤

Debian 下 安装 Oracle 11g XE R2

Oracle性能优化 之 共享池

本文永久更新链接地址:

linux

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!