"Htop, Glances, dstat" introduced the Knife class in--linux system monitoring

System Monitoring tools Htop, Glances, Dstat introduction

background: in an enterprise production environment, many users prefer to monitor the system with the top tools that come with a variety of distributions, but sometimes it may be difficult to find an application or process that occupies a large system resource by using top. Because the top command itself does not help us highlight processes that consume more system resources. Here is a more sharp monitoring tool for the relative top.

htop: is the enhanced version of top. A multi-functional dynamic system monitoring tool that supports mouse operation, highlighting, and automatic sequencing. You can define a specified refresh

Room and interactive operations. The system is not self-bringing, so we need to install it ourselves. Let's take a look at its gorgeous interface.

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Here's an introduction to this interface:

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The CPU, memory, and swap interfaces in the picture are visually visible in strips and numerals. The load average (average load) represents the queue length of the current CPU waiting for the process queue to run, such as a length of 1 for 1 processes, with three values representing

average of the last 1 minutes, 5 minutes, 15 minutes process queue length. A larger value indicates that the current CPU load is higher and you can also use the Htop heel option:-D #: Refresh interval,-u USERNAME: Displays only the process of the specified user-s COLUMN:

The specified fields are sorted.

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s tracks the system calls initiated by the selected process and wants to track a process directly with the mouse selected and type S into the tracking process interface, pressing ESC to end the trace. L Track the files that are open when the selected process is run, the mouse first selects process--type L into the trace process

interface, press F5 to refresh-press the ESC key to end the trace. The T key also has the function of the directory tree. How is not very strong!

   

glances: glances is a GPL-licensed free software used to monitor the Gnu/linux and FreeBSD operating systems. Glances also offers a number of practical options. with glances, we can monitor the utilization of CPU, average load, memory, network traffic, disk I/O, other processors and file system space.

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The same glances also needs to be installed on its own, where the M key means sorting by memory, and the C key means sorting by CPU. More we pass, press H for help.

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For example:   first install Nginx module to start nginx service-->glances-o html-f  /usr/share/nginx/html/.

     dstat: is a real-time refresh tool, and the functionality is very powerful. total-cpu-usage for CPU usage statistics,-dsk/total for disk read/write rate, net/total for network transfer rate, paging for memory page swap, system for interrupt and up and down text toggle.

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     dstat - C: Statistics onlyCPUUsage status. - D: Displays only disk-related usage.- G: Displays only the memory page swap out condition.- N: Displays only the status of the network transport. --io: Displays only The Read and write rate status of the IO device. Where several parameters of the CPUUsr:user space. Sys:system, Idl:idle wai:waiting IO, Hiq:hardware interrupt, Si:software interrupt

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--aio: Displaying asynchronous IO statistics

--IPC:IPC Related Information

--raw:raw socket

--TCP:TCP socket

--UDP:UDP socket

--socket:raw, TCP, UDP

--unix:unix Sock

--TOP-CPU: Show CPU-intensive processes

--top-bio: Shows the process that most occupies block IO

--top-mem: Show the most memory-intensive processes

--top-io: Most IO-intensive process

This article is from the "I and Linux years" blog, please be sure to keep this source http://guanqianjian.blog.51cto.com/9652236/1584766

"Htop, Glances, dstat" introduced the Knife class in--linux system monitoring