Htop the use of the top PS dstat command

Htop the use of the top PS dstat command

Top command
Top provides a real-time, dynamic view of the current running system, which is the running process. By default, displays the task with the highest CPU utilization in the system and refreshes every 5 seconds.


Common hotkeys

Hotkey Usage
T displays the summary information switch.
m Displays the memory information switch.
A classification shows the use of different resources of the system. Helps to quickly identify tasks that are resource-intensive in your system.
F Add Delete the field you want to display.
o Adjust the order in which you want to display the fields.
R adjusts the nice value of a running process.
K to end a running process.
Z Color/Black and white display switch



PS-Displays the process, and the PS command displays a snapshot of the current running process. Displays all processes using-a or-E.

# ps-a

Sample output:

PID TTY Time CMD
1? 00:00:02 Init

2? 00:00:02 migration/0

3? 00:00:01 ksoftirqd/0

6} 00:00:00 watchdog/0

5? 00:00:00 MIGRATION/1

4} 00:00:15 KSOFTIRQD/1

......
......



PS is very similar to top, but PS provides more information.

Output Long format
# Ps-al


Output append full format (shows parameters passed in when the process executes)
# Ps-alf


Show process Structure
# PS-ALFH


Show threads after a process
# PS-ALLM


Print all processes on the server
# PS AX
# PS Axu


Print Process Tree
# PS-EJH
# PS AXJF
# Pstree


Print security information
# Ps-eo Euser,ruser,suser,fuser,f,comm,label
# PS AXZ
# Ps-em


View processes running with the Vivek user name
# ps-u Vivek OR-u Vivek or PS U


Setting Custom output formats
# Ps-eo Pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm
# PS Axo Stat,euid,ruid,tty,tpgid,sess,pgrp,ppid,pid,pcpu,comm
# Ps-eopid,tt,user,fname,tmout,f,wchan


Show only the LIGHTTPD process ID
# ps-c Lighttpd-o pid=
Or
# pgrep Lighttp


Show process name with PID 55977
# ps-p 55977-o comm=


Identify the top 10 processes that consume the most memory
# PS-AUXF | Sort-nr-k 4 | Head-10


Find the top 10 processes with the most CPU
# PS-AUXF | Sort-nr-k 3 | Head-10






1.htop command


Interactive commands:

U: Filter only shows users ' processes

S: Tracks system calls initiated by the selected process

L: Displays the files opened by the selected process

A: Sets the affinity of the CPU of the process (binds the selected process to the specified CPU)

T: Show process Tree of processes



Options:

-D #: Latency often

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

-S COLUMN: Sort according to the specified field



The parameters of the monitoring interface represent meaning

Upper left corner:

Indicates the CPU usage,

MEM represents memory usage,

Swap table Swap partition usage


In the upper right corner:

Tasks: Total number of processes, current number of running processes;

Load average: Represents the average load of the system for 1 minutes, 5 minutes, 15 minutes,

Uptime: Time of system operation


PID means: The identification number of the process;

User represents the users of the running process;

PRI: The priority of the process;

NI: The nice value of the process, the priority value of the process, default to 0;

VIRT: Process consumes virtual memory value;

RES: The physical memory value that the process occupies;

SHR: The shared memory value that the process occupies;

S: The running state of the process, R: Indicates that it is running. S: Indicates sleep state, waiting to wake up. Z: Indicates a zombie state;

CPU%: Percentage of CPU consumed by the process;

mem%: Percentage of memory consumed by the process;

Time+: The time that the process starts to occupy the CPU;

Command: The name of the process command that started the process.





Usage: dstat [-AFV] [Options ...] [Delay [Count]]

Options:

-C: Display statistics related to CPU performance metrics

-D: Show disk-related rate data

-G: Show page-related rate data

-I: Show Interrupt (interrupt)-related rate data

-L: Displays statistics related to load average (i.e. load)

-M: Show memory-related statistics

-N: Shows the rate of data sent and received by the network

-N eth#: Displays the specified interface

-P: Displays the relevant statistics for the process (the rate of the new process, etc.)

Rate of-r:io requests

-S: Show data about swap

-Y: Displays system-related data, including terminal and process switching

--TOP-CPU: Show CPU-intensive processes

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

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

--top-io: The most CPU-owning process

--IPC: Display rate data for interprocess communication

--raw: Displaying data related to raw sockets

--TCP: Displaying data related to TCP sockets

--UDP: Displaying data related to UDP sockets

--unix: Display Inux sock interface related statistics

--socket: Displays all statistics related statistics above (total, TCP, UDP, Raw)

-A:-cdngy

This article from "My Heart _ Sunny" blog, please be sure to keep this source http://wyg11.blog.51cto.com/11253863/1783119

Htop the use of the top PS dstat command