How to use nmon

One 、 brief introduction

1、nmon It's a kind of AIX With all kinds of Linux Monitoring and analysis tools are widely used in operating systems , It can capture the usage of system resources in real time during the operation of the system , The recorded information is relatively comprehensive ,

And can output the results to the file , And then through nmon_analyzer Tools produce data files and graphical results .

2、nmon Types of data that can be monitored

Memory usage

Disk adapter

Free space in file system

CPU Usage rate

Page space and page speed

asynchronous I/O, Only applicable to AIX

Network file system （NFS）

disk I/O Speed and read-write ratio

Server details and resources

Kernel Statistics

Processes that consume the most resources

Run queue information

3、 characteristic

①、 Less system resources （ It's usually less than 2%）

②、 Powerful （ Comprehensive monitoring of data types ）

③、 combination grafana Instrument diagrams like this , It can more intuitively display the monitored data in real time

④、 portability 、 Good compatibility

One 、 Check the installation environment

#  View operating system information 
uname -a 
#  see linux Release version  
lsb_release -a

Two 、nmon Download and install

1、 Official address ：nmon for Linux | Site / Download

According to the operating system and linux edition , Select the corresponding supported version , as follows ：

  Two 、 install

1、 First download to local , And then through mkdir nmon Create a folder ,cd go in nmon Folder , Can pass rz command , perhaps ftp Download the nmon Upload to the server created nmon Folder . And then through tar -zxvf Pressure file .

2、 Select the corresponding version and use mv nmon_x86_64_centos7 nmon Change of name （ You'd better add the path you want to put here ）, use chmod 777 nmon to nmon Empowerment .

 3、 stay nmon Execute under the path where the execution file is located ./nmon The following figure shows that the installation is successful .

  3、 ... and 、 Collect data

# c
 see CPU Related information 
# m
 View memory related information 
# d          
 View disk information 
# n          
 View network related information 
# t
 View the relevant process information 
# h          
 View help related information 

 nmon Through the command ./nmon -ft -s 10 -c 60 -m /root/nmon Start the monitoring , Capture various data of the server

#  Parameter description  
-f    The monitoring results are output in the form of files , Default machine name + date .nmon Format  （YYYYMMDD_HHMM.nmon）
-F    Specify the filename of the output , such as test.nmon 
-s    It refers to the sampling frequency , The unit is millisecond  
-c    It refers to the number of samples , That is, how many times to collect with the above sampling frequency  
-m    Specify the generated file directory 

PS： Generally speaking, it is not recommended to use nmon monitor , Because of the nmon The document exceeds 10M when , The analysis tool will report an error due to insufficient memory .

If necessary , It is suggested to increase the sampling frequency , Reduce sampling times （ lower than 330 Time ）

When the command starts , Will be in nmon Generate monitoring files in the directory , And continue to write resource data , until 360 Collection of monitoring points completed —— I.e. monitoring 1 Hours , These operations are done automatically , No manual intervention ,

The tester can continue to do other things . If you want to stop the monitoring , Need to pass through “#ps –ef|grep nmon” Query process number , Then kill the process to stop monitoring .

ps-ef |grep nmon  # Inquire about nmon process kill-9 process ID      # Forcibly interrupt the monitoring process

nmon The output file is named ： Server name _ Date time .nmon

Such as ：localhost_220416_2309.nmon n

By the following command , take .nmon File to .csv file , Generate the corresponding... In the current directory .csv file

sortlocalhost_220416_0138.nmon>localhost_220416_0138.csv

Four 、 Generate reports

Download the file generated by monitoring to the local

adopt nmon analyser Tools （nmon analyser v51_2.xlsm） Turn into excel file .

1） Open after download nmon analyser v51_2.xlsm

3） And then click Analyser nmon data Button , Select the downloaded file , Then it will be transformed into .excel file , Generate graphical files

nmon Command provides the following views interactively ：

1. System resource view ( Use r key );
2. Process view ( Use t and u key );
3. AIO Process view ( Use A key );
4. Small view of processor usage ( Use c key );
5. Big view of processor usage ( Use C key );
6. Shared processor logical partition view ( Use p key );
7. NFS panel ( Use N key );
8. Network interface view ( Use n key );
9. WLM View ( Use W key );
10. Disk busy graph ( Use o key );
11. Disk group ( Use g key );
12. ESS Virtual path statistics view ( Use e key );
13. JFS View ( Use j key );
14. Kernel Statistics ( Use k key );
15. Long term processor average utilization view ( Use l key );
16. Big page analysis ( Use L key );
17. Paging space ( Use P key );
18. Volume group statistics ( Use V key );
19. Disk Statistics ( Use D key );
20. Disk statistics and graphics ( Use d key );
21. Memory and paging Statistics ( Use m key );
22. Adapter I/O Statistics ( Use a key );
23. Share Ethernet adapter Statistics ( Use O key );
24. Redundancy check good / Warning / Danger view ( Use v key );
25. Details page Statistics ( Use M key );
26. Fibre channel adapter Statistics ( Use ^ key );