Use of the Process management tool Htop/glances/dstat

First, the Linux process related knowledge points:

1) Process concept: a process is a running program.

2) Classification of the process:

1. Follow the status of the process :

Operating state: Running

Sleep state: Sleeping

Interruptible: interruptable

Non-disruptive: uninterruptable

Stop state: Stopped

Zombie State: Zombie

2, according to process processing mode :

(1) Batch Process

(2) Interactive process

(3) Real-time process

3, according to the intensity of operation:

CPU Intensive: The Cpu-bound process consumes more CPU time while it is running.

IO-intensive: The io-bound process consumes more I/O time while it is running.

Note: Typically, I/o-intensive priorities are higher than CPU intensive.

3) Follow the process priority level :

(1) Real-time priority: 0-99, the higher the number, the higher the priority

(2) Static priority: 100-139, the smaller the number, the higher the priority

------NOTE: You can use nice to adjust the value of the Nice value range is [ -20,19], corresponding to 100 to 139; start the process with its default nice value of 0; Its default priority is 120.

(3) Dynamic priority: Kernel maintenance, dynamic adjustment;

II. Process Management tools:

1) Process management tool Htop:

The Htop command is an upgraded version of the top command, which is better than the top command, both functionally and in the interface display.

Enter the command #htop into the user interface:

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Below is the function of F1~F10 and the corresponding letter shortcut keys

f1	View instructions for use of Htop
f2	htop settings
f3	search process
f4	incremental process filter
f5	Show tree structure
f6	select sort by
f7
f8
f9
f10	end htop

support mouse function, mouse click Help or press F1 to display their own assistance

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< Strong> mouse click Setup or press F2 to enter Htop Settings page

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Options:

-D #: Refresh time interval

-U USERNAME: Displays only the processes of the specified user

-S COLUMN: Sort by the specified field

Interactive commands:

U: Show only the process of the specified user

S: Tracks system calls initiated by the selected process

L: Track files opened by selected process

T: Show Process Tree

A: Set CPU affinity (binds the selected process to a CPU)

2) Process management tool glances:

A powerful system monitoring tool: real-time monitoring of information such as Cpu,meomory,load,swap,network,mount,disk.

Enter the command #glances enter the operator interface

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Description of the Glances working interface:

The upper part of the graph is CPU, load (payload), Mem (memory use), swap (swap partition) usage

glances [-BDEHMNRSVYZ1] [-B bind] [-C Server] [-C conffile] [-P port] [-p password] [--password] [-t refresh] [-f file] [- O Output]

Options:

-B: Displays the network card data rate in bytes;

-D: Turn off the disk I/O module

-f/path/to/somewhere: Sets the location of the output file and its format;

-O {html| CSV}

-M: Disable Mount Module

-N: Disable network module

-T #: Specify the Refresh time interval

-1: Data for each CPU is displayed separately

Interactive Commands : There are many interactive commands to define the display information of the glances, and how to sort;

H: Show Help

run the Glances command in C/s mode :

Service mode:

Glances-s-B ipaddr

IPADDR: The native address of your own listener

Client mode:

Glances-c ipaddr

IPADDR: The address that the remote server listens on

3) Process management tool Dstat: Support Plugin

Input #dstat into the operator interface

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Dstat [-AFV] [options:] [Delay [Count]]

Options:

- C: Display CPU statistics, if there are multiple CPU summary statistics

- D: Show disk Statistics, if there are multiple disks summary statistics

- G,--page: Display page information

-I display broken statistics

- l Display system load Information

- m display statistics for memory

- p Show process queue

-R,--io statistical I/O requests, including read and write requests

-S,--swap show swap status

-T,--time displays statistical time, which is useful for analyzing historical data

-y,--sys statistics System information, including interrupts, context switches

--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 "Little Brother Linux" blog, please be sure to keep this source http://9612520.blog.51cto.com/9602520/1582954

Use of the Process management tool Htop/glances/dstat