developerWorks Premium
An all-access pass to building your next great app!
developerWorks Community
This free tool gives you a huge amount of information all on one screen. Even though IBM doesn't officially support the tool and you must use it at your own risk, you can get a wealth of performance statistics. Why use five or six tools when one free tool can give you everything you need?
, pSeries Technical Support, IBM
Nigel Griffiths works in the IBM eServer® pSeries Technical Support Advanced Technology Group. He specialises in performance, sizing, tools, benchmarks, and Oracle RDBMS. The nmon tool was developed to support benchmarks and performance tuning for internal use, but by popular demand is given away to deserving friends. If you have a question on nmon, please go on the Performance Tools Forum site (see ) so that others can find and benefit from the answers. To protect your email address from junk mail, you need to create a USER ID first (takes 20 seconds at most).
Also available in&&
Usage notes: This nmon tool is NOT OFFICIALLY SUPPORTED. No warrantee is given or implied, and you cannot obtain help with it from IBM. If you have a question on nmon, please go on the Performance Tools Forum site (see ) so that others can find and benefit from the answers. To protect your email address from junk mail, you need to create a USER ID first (takes 20 seconds at most).
The nmon tool runs on:
AIX® 4.1.5, 4.2.0 , 4.3.2, and 4.3.3 (nmon Version 9a: This version is functionally established and will not be developed further.) AIX 5.1, 5.2, and 5.3 (nmon Version 10: This version now supports AIX 5.3 and POWER5™ processor-based machines, with SMT and shared CPU micro-partitions.) Linux® SUSE SLES 9, Red Hat EL 3 and 4, Debian on pSeries® p5, and OpenPower™Linux SUSE, Red Hat, and many recent distributions on x86 (Intel and AMD in 32-bit mode) Linux SUSE and Red Hat on zSeries® or mainframe The nmon tool is updated roughly every six months, or when new operating system releases are available. To place your name on the e-mail list for updates, contact Nigel Griffiths.Use this tool together with nmon analyser (see ), which loads the nmon output file and automatically creates dozens of graphs.IntroductionThe nmon tool is designed for AIX and Linux performance specialists to use for monitoring and analyzing performance data, including:
CPU utilizationMemory use Kernel statistics and run queue information Disks I/O rates, transfers, and read/write ratios Free space on file systems Disk adapters Network I/O rates, transfers, and read/write ratios Paging space and paging rates CPU and AIX specificationTop processors IBM HTTP Web cache User-defined disk groupsMachine details and resourcesAsynchronous I/O -- AIX onlyWorkload Manager (WLM) -- AIX onlyIBM TotalStorage® Enterprise Storage Server® (ESS) disks -- AIX onlyNetwork File System (NFS)Dynamic LPAR (DLPAR) changes -- only pSeries p5 and OpenPower for either AIX or LinuxAlso included is a new tool to generate graphs from the nmon output and create .gif files that can be displayed on a Web site.See the README file for more details.
Benefits of the tool The nmon tool is helpful in presenting all the important performance tuning information on one screen and dynamically updating it. This efficient tool works on any dumb screen, telnet session, or even a dial-up line. In addition, it does not consume many CPU cycles, usually below two percent. On newer machines, CPU usage is well below one percent.Data is displayed on the screen and updated once every two seconds, using a dumb screen. However, you can easily change this interval to a longer or shorter time period. If you stretch the window and display the data on X Windows, VNC, PuTTY, or similar, the nmon tool can output a great deal of information in one place.The nmon tool can also capture the same data to a text file for later analysis and graphing for reports. The output is in a spreadsheet format (.csv).Installing the tool The tool is a stand-alone binary file (a different file for each AIX or Linux version) that you can install in five seconds, probably less if you type fast. Installation is simple:
Copy the nmonXXX.tar.Z file to the machine. If using FTP, remember to use binary mode. Note: Version XXX replaces this example.To uncompress the file, run uncompress nmonXX.tar.Z.To extract the files, run tar xvf nmonXX.tar.Read the README file.To start the nmon tool, type nmon.If you are the root user, you might need to type ./nmon.Extra notes for using nmon 9 for AIX 4 onlyYou must be the root user or allow regular users to read the /dev/kmem file by typing the following command (as root):
chmod ugo+r /dev/kmemIf you want the disk statistics, then also run (as root):
chdev -l sys0 -a iostat=trueHow to run the tool interactivelyFor running the tool interactively, read the front page of the file for a few hints. Then start the tool and use the one-key commands to see the data you want. For example, to get CPU, Memory, and Disk statistics, start nmon and type:cmdHow to get help information while running interactivelyPress the h key.Additional help informationFor additonal help information, try the following:
Type the nmon -? command for brief details.Type the nmon -h command for full details.Read the README file.How to capture the data to a file for later analysis and graphingRun nmon with the -f flag. See nmon -h for the details. But as an example, try to run nmon for an hour capturing data snapshots every 30 seconds by using:
? nmon -f -s 30 -c 120
nmon -fT -s 30 -c 120The second line also captures the top processes. Both of these create the output file in the current directory called:
? &hostname&_date_time.nmonThis file is in a comma-separated values (CSV) format and can be imported into a spreadsheet directly. If you are using Lotus® 1-2-3, the file needs to be sorted. (This is not required for the Excel version of the nmon analyser.)
On AIX, follow this example:
? sort -A mymachine_0.nmon & xxx.csvNotes to save you time:To load the nmon data capture file into a spreadsheet, check the spreadsheet documentation for loading CSV data files (.csv). Many spreadsheets accept this data as just one of the possible files to load or provide an import function to do this. Many spreadsheets have a fixed number of columns and rows. I suggest you collect a maximum of 300 snapshots to avoid hitting these issues. When you are capturing data to a file, nmon disconnects from the shell to ensure that it continues running, even if you log out. This means that nmon can appear to crash, even though it's still running in the background. To see if the process is still running, type:
ps ?ef | grep nmonRead the README file for more information about which version of nmon to run on your particular operating system.nmon Version 10 for AIX 5 no longer uses /dev/kmem, but only public APIs. So, you don't have to chage the permissions on /dev/kmem, and there is no need to have 32- and 64-bit versions of nmon.For AIX 5.1, 5.2, and 5.3, use nmon 10. On AIX, don't report lslpp -Lcq bos.?p core dumps on AIX 5.1, about ML03 onwards. Also, WLM stats go missing after upgrading to AIX 5.2 ML5 to Nigel Griffiths, as these are AIX bugs. These are avoided by using nmon Version 10.Don't use Microsoft® Windows® Telnet and use a larger window than 80 x 25 characters. Many developers use VNC and PuTTY to display nmon from a Windows machine -- why not do the same!New features for nmon on AIX Version 10New
FeaturesDescriptionStarting
upThere is also now a small shell script called "nmon" that starts the right nmon version.
Place this script and nmon binaries in your
$PATH and type: nmon. This version is now only
compiled in 32-bit mode. So, it runs on 32- and 64-bit hardware.
is to make it easier to install and run.N =
NFSNFS is completely new for nmon
10.p = PartitionsThis is for
shared CPU partitions information -- the big p5/AIX5.3 feature.
C = CPUThis is for machines with 32
plus CPUs -- up to 128 logical CPUs by demand.c = CPUDetails your physical CPU use -- if you
are on a POWER5 with AIX 5.3 and in a shared CPU
environment.S =
SubclassThis is for WLM subclasses -- by
request.a = Disk
adaptersGives you details of the disk adapter -- like
their full type.r =
ResourcesThis includes your CPU speed in
MHz.k = KernelGives
some new fields.L = Large
pagesGives you large-page stats -- popular with
high-performance guys.D =
DiskGives you more information about your disks, disk
type sizes, free, volume groups, adapter, and so
forth.n = NetworkGives
you information about your network adapters details, MTU,
and errors.m =
MemoryGives you more details on where your
memory is going, system (kernel) and processes, and
active virtual memory.-BThis is a start-up option
to remove the boxes.Sample output for nmon 10 for AIX
below is a sample of the screen output. It
shows the opening screen for AIX 5, with
lots of useful information.Figure 1. Sample output
for nmon 10 for AIX 5
illustrates the details for
CPU (this is a 4 CPU POWER5
machine with SMT switched on),
memory use, kernel internal
statistics, and disks
statistics.
Note: This
logical partition (LPAR) is
using six times its
entitlement in half a
CPU.Figure 2.
CPU details shows the
details of the
network, NFS
statistics, and
journal filesystem
use.Figure
3. Network
detailsThe
micro-partitions
statistics
below.Figure
illustrates
details of the Linux version of nmon, showing the CPU (this is a 2 CPU POWER5 machine with SMT switched on), LPAR statistics, memory use, network statistics, file system use, and disks statistics.
Note: The physical CPU of this LPAR is only available with SUSE SLES9 Service Pack 1 and Red Hat EL 4 Update 1.Figure 5. Linux version of nmon shows the OS details of the machine, disk statistics (detailed mode), and the top processes.Figure 6. Linux version of nmon continuedObtaining the tool The following download options are available:
You can download nmon and its tools from IBM Wiki at .Check out the Performance Tools forum for nmon questions and ideas at .
Resources"" (developerWorks, April 2006): Produce a wealth of report-ready graphs from nmon output.
Check out the following IBM Redbooks for additional information on performance:
, SG24-4810-01, Febraruary 2001, SG24-5511, January
2003,SG24-6039, August 2003Check out other articles and tutorials written by Nigel Griffiths:
"": Browse through this article to get rid of your CPU bottlenecks and improve performance.Search the AIX and UNIX library by topic:
: The AIX and UNIX developerWorks zone provides a wealth of information relating to all aspects of AIX systems administration and expanding your UNIX skills.: Visit the New to AIX and UNIX page to learn more about AIX and UNIX.: A collaborative environment for technical information related to AIX.: Visit this e-reference library to find specific technical resources.
: Stay current with developerWorks technical events and webcasts.
: Tune in and catch up with IBM technical experts.
: Build your next development project with software for download directly from developerWorks.: Download nmon and its tools.Participate in the
and get involved in the developerWorks community.
Participate in the AIX and UNIX forums:
: Check out the Performance Tools forum for nmon questions and ideas.
developerWorks: Sign in
Required fields are indicated with an asterisk (*).
Password:*
Keep me signed in.
By clicking Submit, you agree to the .
The first time you sign into developerWorks, a profile is created for you.
Information in your profile (your name, country/region, and company name) is displayed to the public and will accompany any content you post, unless you opt to hide your company name.
You may update your IBM account at any time.
All information submitted is secure.
Choose your display name
The first time you sign in to developerWorks, a profile is created for you, so you need to choose a display name.
Your display name accompanies the content you post on developerWorks.
Please choose a display name between 3-31 characters. Your display name must be unique in the developerWorks community and should not be your email address for privacy reasons.
Required fields are indicated with an asterisk (*).
Display name:*(Must be between 3 & 31 characters.)
By clicking Submit, you agree to the .
All information submitted is secure.
Dig deeper into AIX and Unix on developerWorks
Get samples, articles, product docs, and community resources to help build, deploy, and manage your cloud apps.
Keep up with the best and latest technical info to help you tackle your development challenges.
Software development in the cloud.
Register today to create a project.
Evaluate IBM software and solutions, and transform challenges into opportunities.
static.content.url=/developerworks/js/artrating/SITE_ID=1Zone=AIX and UNIXArticleID=104684ArticleTitle=nmon performance: A free tool to analyze AIX and Linux performancepublish-date=lonelycloud1218的频道-优酷视频
0视频播放数
还没有收到留言
频道介绍：
还未添加频道介绍
今日新增:0
最近没有访客
点击这里添加你的微博秀,展示你的微博和粉丝。
微信分享给好友
@对他说/推荐给粉丝
自定义主页模块
自定义视频栏目扫扫二维码，随身浏览文档
手机或平板扫扫即可继续访问
I Wandered Lonely as a Cloud
举报该文档为侵权文档。
举报该文档含有违规或不良信息。
反馈该文档无法正常浏览。
举报该文档为重复文档。
推荐理由：
将文档分享至：
分享完整地址
文档地址：
粘贴到BBS或博客
flash地址：
支持嵌入FLASH地址的网站使用
html代码：
&embed src='/DocinViewer-4.swf' width='100%' height='600' type=application/x-shockwave-flash ALLOWFULLSCREEN='true' ALLOWSCRIPTACCESS='always'&&/embed&
450px*300px480px*400px650px*490px
支持嵌入HTML代码的网站使用
您的内容已经提交成功
您所提交的内容需要审核后才能发布，请您等待！
3秒自动关闭窗口很久没去写东西了，工作了一年多，有时候感觉什么事都没心思做了，也就没心思写了。
&&&&&一直以来没写过博客，原来也只是看看过儿的文章，看看她怎么样了，然后就做其他事了，也就没什么了。
这些天很孤独，事情总还是在做，一旦静下来，就想起很多事，无奈的事情，却又无法释怀。
&&&&&想的累了，也想的很透了，却还是不由自主去想。
于是希望自己是有事情做的，喜欢打游戏，一晚上也很容易过去，只有临睡着的那几十分钟——
喜欢看看电视剧了，还是长点的好，一直拖着我也还能看，实在累了，也该睡了。
&&&& 就这样了。一直以为自己在推着生活走，有一阵被生活推着走了。
&&&& 现在都走不动了吧。
&&&&&精神不怎么好了，体质也没那么好了，这么半睁着眼想来也写不了什么好的来，就这么吧。
&&&& 回头过个几年或许想起来，回头看看！
亲爱的朋友：
&&&&欢迎您在新浪博客安家，您的博客地址是：
&&&&您可以用文字、图片、视频记录和展示最真实的自我，与网友交流，与线上好友聊天，还能通过手机发表博文和上传图片，随时随地记录心情和身边趣闻。
&&&&我们为您提供了丰富的炫酷模板来装点您在网上的家园，强大的音乐播放功能更能陪伴您的网络生活。准备好了吗？现在就开始精彩的博客之旅！Lonely一cloud
现居：其他
曼谷→素可泰→清迈→派县→清莱→曼谷→帕岸岛→苏梅→甲米→普吉→华欣→曼谷→回家。大概路线就这样，但是请教下是先南下开始走起舒服还是先北上舒服呢？
|回答 6同问 0
求类似穷游，爱廉价之类的结伴网站~谢谢啊~
|回答 1同问 0
2013年7月的满月派对是21还是23号啊？8月的满月派对时间是几号啊？
|回答 1同问 0
/u/2395109/ask/}