Shulou(Shulou.com)06/01 Report--

Today, I will talk to you about how to view the corresponding information analysis system for CentOS CPU utilization. Many people may not know much about it. In order to make you understand better, the editor has summarized the following contents for you. I hope you can get something according to this article.

Before giving you a detailed introduction to CentOS CPU, first let you know about CentOS CPU, and then a comprehensive introduction to CentOS CPU, I hope it will be useful to you. In the process of system maintenance, it may be necessary to check the CentOS CPU utilization rate at any time and analyze the status of the system according to the corresponding information.

In CentOS, you can view CentOS CPU usage through the top command. After running the top command, the CentOS CPU usage status is displayed in full screen and in conversation mode-using top-based commands, you can control how it is displayed, and so on. The command to exit top is Q (hit the Q key once while top is running).

Operation example:

Type "top" on the command line to start top

The full-screen dialogue mode of top can be divided into three parts: system information bar, command input bar and process list bar.

* * section-- the top system information bar:

* Line (top):

"00:11:04" is the current time of the system; "3:35" is the operating time since the system was started; "2 users" is the number of users currently logged in to the system, more specifically, the number of terminals logged in to the user-the connection of the same user to multiple terminals of the system at the same time will be regarded as multiple users connected to the system.

The number of users here will also be shown as the number of terminals; "load average" is the average of the current system load, and the next three values are the average number of processes before 1 minute, 5 minutes ago and 15 minutes ago, respectively. It is generally believed that when this number exceeds the number of CentOS CPU, CentOS CPU will be more laborious to load the processes contained in the current system.

The second line (Tasks):

"59 total" is the total number of processes in the current system

"1 running" is the number of processes currently running

"58 sleeping" is the number of processes currently waiting

"0 stoped" is the number of system processes stopped

"0 zombie" is the number of processes restored

The third line (Cpus):

Represents the current utilization of CentOS CPU, respectively.

Line 4 (Mem):

Represents the total amount of memory, the current usage, the amount of free memory, and the amount of memory in buffer use

Line 5 (Swap):

Indicates that the category is the same as the fourth line (Mem), but here reflects the use of the swap partition (Swap). In general, the frequent use of swap partitions (Swap) will be seen as the result of insufficient physical memory.

The second part-the internal command prompt bar of the middle part:

During the operation of top, the display mode of the process can be controlled by the internal commands of top. The internal commands are as follows:

S-change the screen update frequency

L-turn off or turn on the representation of top information of * partial * lines

T-turn off or turn on the representation of the second line Tasks and the third line Cpus information in the * * section.

M-turn off or turn on the representation of the fourth line Mem and the fifth line Swap information in the * * section

N-represents the list of processes in order of PID size (later in part 3)

P-sorts the list of processes in the order of CentOS CPU occupancy (later in part 3)

M-sorts the list of processes in order of memory usage (later in part 3)

H-Show help

N-sets the number of processes displayed in the process list

Q-exit top

S-change the screen update cycle

Part III-the process list bar at the bottom:

The list of processes distinguished by PID will be updated periodically according to the set screen update time. You can control how it is displayed here through top internal commands.

After reading the above, do you have any further understanding of how to use CentOS CPU to view the corresponding information analysis system? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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