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【学习笔记】Oracle数据库MOS中关于AIO 在AIX 6.1系统配置案例

时间:2016-10-23 19:30   来源:Oracle研究中心   作者:HTZ   点击:

天萃荷净 Oracle研究中心学习笔记:最近在AIO 6.1与SF环境中遇到了AIO的问题,本文章内容是MOS中关于AIO 在6.1下的一般变化配置的说明。

AIO on AIX 6.1 (文档 ID 1328019.1)

修改时间:2014-5-6

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类型:HOWTO

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In this Document

Goal

Fix

References

APPLIES TO:

Oracle Server – Enterprise Edition – Version 10.2.0.4 to 11.2.0.2.0 [Release 10.2 to 11.2]

IBM AIX on POWER Syste

AIO on AIX 6.1 (文档 ID 1328019.1)

修改时间:2014-5-6
clip_image001[14]
类型:HOWTO

clip_image001[15]
In this Document

Goal
Fix
References

APPLIES TO:
Oracle Server – Enterprise Edition – Version 10.2.0.4 to 11.2.0.2.0 [Release 10.2 to 11.2]
IBM AIX on POWER Systems (64-bit)
GOAL
Enabling or checking AIO on AIX 6.1 Operating System.
FIX

Customers do not need to enable AIO subsystem on AIX 6.1 as it’s a default option. AIO subsystems are handled thru AIX kernel extensions and they are loaded by default. They are also automatically started when an application initiates an AIO requests.

Two new parameters (aio_active and posix_aio_active; ioo -a | grep aio) have been added on AIX 6.1, but they can only be changed by AIX. The value is set to 1 only when AIX kernel extensions are used and pinned.

So, the bottom line is that you don’t need to do any checking on AIX 6.1. Another way of checking if AIO subsystems are loaded is to verify whether kernel extensions are loaded or not. You can do that by doing “genkex | grep aio”.

As an example – the following command may show:

/usr/sbin/ioo -a | grep aio
aio_active = 1
aio_maxreqs = 8192
aio_maxservers = 40
aio_minservers = 20
aio_server_inactivity = 300
posix_aio_active = 1
posix_aio_maxreqs = 65536
posix_aio_maxservers = 30
posix_aio_minservers = 3
posix_aio_server_inactivity = 300

NOTE: Please note that Oracle is not recommending changes to these parameters as they are dynamically tuned by AIX 6.1 and values of these parameters get changed according to the server utilization. AIX will adjust them accordingly.
ms (64-bit)

GOAL

Enabling or checking AIO on AIX 6.1 Operating System.

FIX

Customers do not need to enable AIO subsystem on AIX 6.1 as it’s a default option. AIO subsystems are handled thru AIX kernel extensions and they are loaded by default. They are also automatically started when an application initiates an AIO requests.

Two new parameters (aio_active and posix_aio_active; ioo -a | grep aio) have been added on AIX 6.1, but they can only be changed by AIX. The value is set to 1 only when AIX kernel extensions are used and pinned.

So, the bottom line is that you don’t need to do any checking on AIX 6.1. Another way of checking if AIO subsystems are loaded is to verify whether kernel extensions are loaded or not. You can do that by doing “genkex | grep aio”.

As an example – the following command may show:

/usr/sbin/ioo -a | grep aio

aio_active = 1

aio_maxreqs = 8192

aio_maxservers = 40

aio_minservers = 20

aio_server_inactivity = 300

posix_aio_active = 1

posix_aio_maxreqs = 65536

posix_aio_maxservers = 30

posix_aio_minservers = 3

posix_aio_server_inactivity = 300

NOTE: Please note that Oracle is not recommendOracle oracleplus.neting changes to these parameters as they are dynamically tuned by AIX 6.1 and values of these parameters get changed according to the server utilization. AIX will adjust them accordingly.

本文固定链接: http://www.htz.pw/2014/05/25/aio-on-aix-6-1-%e6%96%87%e6%a1%a3-id-1328019-1.html | 认真就输

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最权威、专业的Oracle案例资源汇总之【学习笔记】Oracle数据库MOS中关于AIO 在AIX 6.1系统配置案例

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Oracle研究中心

关键词:

AIO on AIX 6.1

Oracle MOS中关于AIO的解释说明

AIO on AIX 6.1 (文档ID 1328019.1)