IBM WebSphere Portal 6.1项目实施与开发、配置技巧集锦（8）

第2章     操作系统管理策略
2.1.1   限制应用程序对CPU的使用率
2.1.1.1  安装WLM (Workload Manager)设置步骤
环境:RS6000,pSeries AIX

问题描述:
客户需要限制某些用户CPU和内存的使用率,可以通过设置WLM (Workload Manager)来实现.

解答:
步骤如下:
1.smit wlm

2.添加 class:
选择Add a class
Class name ftp
Description [cpu mem Intensive]
Inheritance [Yes]
Localshm
[Yes]
3.添加规则,
选择"Class assignment rules"
Create a new Rule
添加监控的用户,组以及应用的所在目录
Order of the rule 1
New Order of the rule [1]
Class name ftp
User [root]
Group [-]
Application [/usr/sbin/ftpd]
Type [-]
Tag
[-]
4.显示class
System
Default
Shared
ftp

5.Change / Show Characteristics of a class
指定cpu限制
CPU resource management -->

Class name ftp
Shares [-]
Minimum (%) [2]
Maximum (%) [5]
Absolute Maximum (%) [5]

指定memory限制
Memory resource management -->
Class name ftp
Shares [-]
Minimum (%) [2]
Maximum (%) [5]
Absolute Maximum (%) [5]

6.启动 WLM
smit wlm -->
Start/Stop/Update WLM -->
Start Workload Manager

Configuration, or for a set: set name/currently current
applicable configuration
Management mode active
Enforce Resource Set bindings Yes
Disable class total limits on resource usage Yes
Disable process total limits on resource usage Yes
Start now, at next boot, or both ? Now

7.验证WLM是否生效:
ftp 到服务器,执行以下命令:
put "|dd if=/dev/zero bs=32k count=10000" /dev/null

8.用命令检查WLM是否生效
wlmstat命令
#wlmstat
CLASS CPU MEM DKIO
Unclassified 0.00 27.93 0.00
Unmanaged 0.02 44.54 0.00
Default 0.12 6.43 0.00
Shared 0.00 3.12 0.00
System 14.38 50.05 0.00
ftp 0.00 0.01 0.00
TOTAL 14.50 87.54 0.00

topas命令
#topas -W
Topas Monitor for host: aix61haos1 Interval: 2 Tue Apr 7 15:19:32 2009
WLM-Class (Active) CPU% Mem% Blk-I/O%
ftp 7 0 0
System 3 50 0
Default 0 6 0
Unmanaged 0 45 0
Shared 0 3 0
Unclassified 0 28 0

svmon命令
#svmon -W ftp
======================================================================
Superclass Inuse Pin Pgsp Virtual
ftp 434 4 0 262

PageSize Inuse Pin Pgsp Virtual
s 4 KB 434 4 0 262
m 64 KB 0 0 0 0

以上说明cpu,内存使用率已经限定在指定范围内.