chdev -l sys0 -a iostat=true
How to run the tool interactively
For 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:
cmd
How to get help information while running interactively
Press the h key.
Additional help information
For 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 graphing
Run 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 120
The second line also captures the top processes. Both of these create the output file in the current directory called:
_date_time.nmon
This file is in a comma-separated values (CVS) 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_311201_1030.nmon > xxx.csv
Notes to save you time:
- To load the nmon data capture file into a spreadsheet, check the spreadsheet documentation for loading CVS 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 nmon
- Read 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!
Back to top
New features for nmon on AIX Version 10
New Features
Description
Starting up
There 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. The idea is to make it easier to install and run.
N = NFS
NFS is completely new for nmon 10.
p = Partitions
This is for shared CPU partitions information -- the big p5/AIX5.3 feature.
C = CPU
This is for machines with 32 plus CPUs -- up to 128 logical CPUs by demand.
c = CPU
Details your physical CPU use -- if you are on a POWER5 with AIX 5.3 and in a shared CPU environment.
S = Subclass
This is for WLM subclasses -- by request.
a = Disk adapters
Gives you details of the disk adapter -- like their full type.
r = Resources
This includes your CPU speed in MHz.
k = Kernel
Gives some new fields.
L = Large pages
Gives you large-page stats -- popular with high-performance guys.
D = Disk
Gives you more information about your disks, disk type sizes, free, volume groups, adapter, and so forth.
n = Network
Gives you information about your network adapters details, MTU, and errors.
m = Memory
Gives you more details on where your memory is going, system (kernel) and processes, and active virtual memory.
-B
This is a start-up option to remove the boxes.
Back to top
本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/8211/showart_68291.html
| 欢迎光临 Chinaunix (http://bbs.chinaunix.net/) | Powered by Discuz! X3.2 |