温馨提示×

温馨提示×

您好,登录后才能下订单哦!

密码登录×
登录注册×
其他方式登录
点击 登录注册 即表示同意《亿速云用户服务条款》

DBT-11211 when use AMM on OS whose memory > 4GB

发布时间:2020-05-31 22:00:44 来源:网络 阅读:1399 作者:roidba 栏目:关系型数据库

数据库安装遇到的BUG

系统:rhel 7.3
数据库 :Oracle 12.2.0.1.0

APPLIES TO:
Oracle Database Configuration Assistant - Version 11.2.0.3 to 12.2.0.1 [Release 11.2 to 12.2]
Linux x86-64
***Checked for relevance on 18-Apr-2017***
SYMPTOMS
On Linux, create database with DBCA on systems with more than 4 GB physical memory ignores memory_target and does not set up AMM in 11.2.0.3 or higher version.

This is visible when the database is created in silent mode from a template, ASMM will be set even if memory_target >0. 

In interactive mode you may mark AMM at the corresponding step - it will not be marked by default.

Note: In database 12.2, you could encounter DBT-11211 when use AMM on OS whose memory > 4GB. You have to make use of ASMM instead of AMM.

CAUSE
In response to unpublished
Bug 12540053 : USE SGA_TARGET WHEN THE SYSTEM HAS MORE THAN 4G OF MEMORY

DBCA will setup sga_target and not memory_target when the system has more than 4GB of physical memory.

SOLUTION
This change was intended and was implemented to simplify the starting point/seed database across platforms, so that huge/large pages can be used if configured.

On platforms such as Linux there are huge pages limitations in using memory_target that do not affect all platforms.

The use of AMM is absolutely incompatible with huge pages on Linux. AMM overwrites huge pages.
向AI问一下细节

免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。

AI